KR102705083B1 - Method, server and computer program for analyzing power network including distributed power - Google Patents

Abstract

A method for analyzing a power network including a distributed power source according to various embodiments of the present invention for realizing the aforementioned task is disclosed. The method may include a step of obtaining a system diagram related to a power network including a distributed power source, a step of generating a system tree in a vertical structure based on section information of the system diagram, and a step of generating power analysis information through analysis of the system tree.

Description

METHOD, SERVER AND COMPUTER PROGRAM FOR ANALYZING POWER NETWORK INCLUDING DISTRIBUTED POWER

Various embodiments of the present invention relate to a method, server and computer program for generating a single-line diagram that provides convenience in calculating power demand and protection coordination criteria in a power system including distributed power sources.

Today, due to economic growth and changes in lifestyle, the demand for electricity continues to increase, and as social concerns about global warming increase, the demand for the use of new and renewable energy as a new energy source is also increasing. In this environment, distributed power sources (or distributed power sources) are being connected to the distribution system according to the government's policy to expand and distribute new and renewable energy.

As the utilization of distributed power sources increases, unlike large-scale centralized power sources such as thermal and nuclear power plants, they can be distributed and placed near areas where power is consumed. Distributed power sources can include new energies such as fuel cells, liquefied natural gas gasification, and hydrogen energy, as well as renewable energies such as geothermal heat, bio, wave power, hydropower, wind power, waste, solar power, and solar energy.

Since power supply through distributed power sources is difficult to supply consistently due to many environmental factors, it can be mainly linked to the power grid, such as an energy storage system. This reduces the peak load of distribution facilities during times of high power demand, and can supply power stably and efficiently. In addition, since it is small in size and placed near power consumption areas, it has the advantage of resolving the imbalance in power plant locations.

However, the current distribution system infrastructure and operation method may have many limitations in accommodating a large number of distributed power sources. Since the distribution system is a system designed and operated for the purpose of supplying power to the load, the reverse current that may occur when a power source is connected to the distribution system may cause various technical problems that were not considered in the existing distribution system. In addition, when connected to a distributed power source, the impedance of the power source decreases, and in the event of an accident, it may be difficult to detect the cause of the failure on the power source side or the distribution protection equipment side.

More specifically, the current distribution system is designed to operate based on one-way power flow in terms of line configuration and protection coordination system, so if a large number of distributed power sources that generate reverse power flow are connected to the system, problems such as system reliability and power quality may arise. In addition, when distributed power sources are connected, it is difficult to determine the actual demand power as the calculation of supply/demand power becomes more complicated, and power factor calculation may also become more complicated.

In particular, in the distribution system, when a specific line fails, the nearest protective device is shut off, and only the part connected to the protective device is powered off. In the case where the protective coordination is not properly performed, problems may occur, such as judging a normal state as a failure and shutting down the line, or not shutting down the line in a shut-off situation. This problem can cause a lot of damage to power demanders, as it can shut down not only the part connected to the protective device, but also the entire region.

In order for the protection device to operate in the protection coordination process, the maximum current and fault current of the installed point must be used to determine the cutoff reference point. In general, in the case of a one-way system, if only the length of the wire from the fault point to the circuit breaker is known, the fault current can be determined by calculating the impedance. However, in the case of distributed power sources, since a formula is established for each connected power source and a comprehensive calculation is made, the formula is complex and the calculation can be difficult. For example, if 50 to 60 distributed power sources with different patterns are connected, the calculation itself for identifying the fault current can be very difficult.

In addition, the current distribution system is not linked to the geographic information system (GIS) and power grid information, making it difficult to integrate them to create a power network. For example, if the geographic information and power grid information do not match, there is a concern that the information on the field of distribution facilities and the information on power demand forecasts will not match, which may provide incorrect information to managers who perform monitoring and management accordingly.

Therefore, the industry may require research and development on a data structure that facilitates simulation for load calculation and diagnosis even when distributed power sources are connected to the grid, and integrates geographic information and power system information.

Republic of Korea registered patent 10-2254008

The problem to be solved by the present invention is to provide a single-line diagram that improves the convenience of calculating power demand and protection coordination criteria in a power system including distributed power sources, in response to the aforementioned background technology.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to solve the above-described problem, a method for analyzing a power network including a distributed power source according to one embodiment of the present invention is disclosed. The method may include a step of obtaining a system diagram related to a power network including a distributed power source, a step of generating a system tree in a vertical structure based on section information of the system diagram, and a step of generating power analysis information through analysis of the system tree.

In an alternative embodiment, the section information of the genealogy includes information related to a connection between one or more nodes, and the step of generating the genealogy tree includes the step of creating the genealogy tree by setting a node related to a reference point as a top node and connecting one or more nodes according to a hierarchical level based on the top node, and one or more nodes included in the genealogy tree may include a parent node related to an upper node and a child node related to a lower node of the parent node.

In an alternative embodiment, the step of generating the lineage tree may include the step of identifying whether a branch exists between connected nodes based on the interval information, and if the branch exists, the step of generating one or more sibling nodes corresponding to the branch at the same level as the child node.

In an alternative embodiment, the reference point is associated with at least one of a substation and a fault point, and the grid tree may include a forward grid tree with the substation as the top node and a reverse grid tree with the fault point as the top node.

In an alternative embodiment, the step of generating the system tree includes at least one of the steps of generating the forward system tree and the step of generating the reverse system tree, wherein the forward system tree can be utilized for analyzing malfunction of the protection device, and the reverse system tree can be utilized for non-operation analysis and fault current analysis of the protection device.

In an alternative embodiment, the step of generating the reverse system tree may include the step of generating the reverse system tree by setting the low-voltage distributed power source associated with the fault point as a branch of the fault point, if there is a low-voltage distributed power source associated with the fault point.

In an alternative embodiment, the step of generating the reverse power tree may include, if the distributed power source is connected to the load side of the fault point, a step of generating the reverse power tree by setting the distributed power source as a branch of the fault point, and, if the trunk connection point of the distributed power source is on the load side of the trunk connection point of the fault point, a step of generating the reverse power tree by setting the trunk connection point of the fault point as a trunk of the reverse power tree and setting the trunk connection point of the distributed power source as a branch.

In an alternative embodiment, the step of generating the reverse power tree may include the step of generating the reverse power tree by inserting the distributed power source as an upper node of a node registered as the power source side of the distributed power source, if the distributed power source is linked to the power source side of the fault point.

In an alternative embodiment, the step of generating power analysis information through analysis of the system tree may include the steps of generating relative coordinate information based on the system tree, generating absolute coordinate information based on the relative coordinate information, generating a single-line diagram based on the absolute coordinate information, and generating power analysis information through analysis of the single-line diagram.

In an alternative embodiment, the single-line diagram includes a forward-line single-line diagram generated in response to the forward-line tree information and a reverse-line single-line diagram generated in response to the reverse-line tree information, and the power analysis information may include at least one of information on a power outage, information on a power supply plan, information on protection cooperation, information on a facility plan, and information on section load management.

A computing device according to another embodiment of the present invention is disclosed. The computing device includes a memory storing one or more instructions and a processor executing one or more instructions stored in the memory, and the processor can perform a power network analysis method including the above-described distributed power source by executing the one or more instructions.

According to another embodiment of the present invention, a computer program stored in a computer-readable recording medium is disclosed. The computer program is combined with a computer as hardware and can perform a method for analyzing a power network including a distributed power source.

Other specific details of the present invention are included in the detailed description and drawings.

According to various embodiments of the present invention, a single-line diagram can be provided to improve the convenience of calculating power demand and calculating protection coordination criteria in a power system including a distributed power source.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

FIG. 1 is a conceptual diagram illustrating a system in which various aspects of a method for generating a single-line diagram that provides convenience in calculating power demand and calculating protection coordination criteria in a power system including a distributed power source related to one embodiment of the present invention can be implemented.
FIG. 2 illustrates a block diagram of a computing device that generates a single-line diagram that provides convenience in calculating power demand and calculating protection coordination criteria in a power system including a distributed power source according to one embodiment of the present invention.
FIG. 3 illustrates a flowchart exemplarily showing a method for generating a single-line diagram related to one embodiment of the present invention.
FIG. 4 illustrates a flowchart exemplarily illustrating a method for generating power analysis information related to one embodiment of the present invention.
FIG. 5 is a flowchart exemplarily showing a method for synchronizing system information between a distribution automation system and a geographic information system according to one embodiment of the present invention.
FIG. 6 is an exemplary diagram showing a system diagram related to one embodiment of the present invention.
FIG. 7 is an exemplary diagram illustrating a system diagram and system tree related to one embodiment of the present invention.
FIG. 8 is an exemplary diagram illustrating a system tree and relative coordinate information related to one embodiment of the present invention.
FIG. 9 illustrates an exemplary diagram exemplifying relative coordinate information related to one embodiment of the present invention.
FIG. 10 is an exemplary diagram showing a phylogenetic tree and an inverse phylogenetic tree related to one embodiment of the present invention.
FIG. 11 is an exemplary diagram illustrating a process of generating a reverse phylogenetic tree related to one embodiment of the present invention.
FIG. 12 is an exemplary diagram illustrating a process of generating a reverse phylogenetic tree related to another embodiment of the present invention.
FIG. 13 is an exemplary diagram illustrating a process of generating a reverse phylogenetic tree according to another embodiment of the present invention.
FIG. 14 is an exemplary diagram illustrating a process of generating a reverse phylogenetic tree according to another embodiment of the present invention.
FIG. 15 is an exemplary diagram illustrating a process of generating a reverse phylogenetic tree according to another embodiment of the present invention.
Figure 16 is an exemplary diagram showing a first block diagram and a second block diagram related to one embodiment of the present invention.
FIG. 17 is an exemplary diagram illustrating first tree structure information and second tree structure information related to one embodiment of the present invention.
FIG. 18 is an exemplary diagram illustrating a subtree cumulative score calculation process related to one embodiment of the present invention.
FIG. 19 is an exemplary diagram illustrating a note count score calculation process related to one embodiment of the present invention.
FIG. 20 is an exemplary diagram illustrating a process of modifying tree structure information related to one embodiment of the present invention.
FIG. 21 and FIG. 22 are diagrams exemplarily showing diagnostic result reports related to one embodiment of the present invention.
Figures 23 to 27 are drawings exemplifying analysis tools related to one embodiment of the present invention.

Various embodiments are now described with reference to the drawings. In this specification, various descriptions are set forth to provide an understanding of the invention. However, it will be apparent that these embodiments may be practiced without these specific descriptions.

The terms "component," "module," "system," and the like, as used herein, refer to a computer-related entity, hardware, firmware, software, a combination of software and hardware, or an execution of software. For example, a component may be, but is not limited to, a procedure running on a processor, a processor, an object, a thread of execution, a program, and/or a computer. For example, an application running on a computing device and the computing device may both be components. One or more components may reside within a processor and/or a thread of execution. A component may be localized within a single computer. A component may be distributed between two or more computers. Furthermore, such components may execute from various computer-readable media having various data structures stored therein. The components may communicate via local and/or remote processes, for example, by a signal comprising one or more data packets (e.g., data from one component interacting with another component in a local system, a distributed system, and/or data transmitted via a network such as the Internet to another system via the signal).

Additionally, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or." That is, unless otherwise specified or clear from the context, "X employs A or B" is intended to mean either of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, "X employs A or B" can apply to any of these cases. Furthermore, the term "and/or" as used herein should be understood to refer to and include all possible combinations of one or more of the associated items listed.

Also, the terms "comprises" and/or "comprising" should be understood to mean the presence of the features and/or components. However, it should be understood that the terms "comprises" and/or "comprising" do not exclude the presence or addition of one or more other features, components, and/or groups thereof. Also, unless otherwise specified or clear from the context to refer to the singular form, the singular form as used in the specification and claims should generally be construed to mean "one or more."

Those skilled in the art should additionally recognize that the various illustrative logical blocks, configurations, modules, circuits, means, logics, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as combinations of electronic hardware, computer software, or both. To clearly illustrate the interchangeability of hardware and software, various illustrative components, blocks, configurations, means, logics, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application. However, such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

The description of the disclosed embodiments is provided to enable a person skilled in the art to make or use the present invention. Various modifications to these embodiments will be apparent to a person skilled in the art. The general principles defined herein may be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention is not limited to the disclosed embodiments. The present invention is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

In this specification, a computer means any kind of hardware device including at least one processor, and may be understood to encompass software configurations operating on the hardware device according to an embodiment. For example, a computer may be understood to encompass, but is not limited to, a smartphone, a tablet PC, a desktop, a laptop, and all user clients and applications running on each device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

Although each step described in this specification is described as being performed by a computer, the subject of each step is not limited thereto, and at least some of each step may be performed by different devices depending on the embodiment.

FIG. 1 is a conceptual diagram illustrating a system in which various aspects of a method for generating a single-line diagram that provides convenience in calculating power demand and calculating protection coordination criteria in a power system including a distributed power source related to one embodiment of the present invention can be implemented.

As illustrated in FIG. 1, a system according to embodiments of the present invention may include a server (100), a user terminal (20), an external server (30), and a network. The components illustrated in FIG. 1 are exemplary, and additional components may exist or some of the components illustrated in FIG. 1 may be omitted. The server (100), the user terminal (20), and the external server (30) according to embodiments of the present invention may mutually transmit and receive data for a system according to embodiments of the present invention through a network.

A network according to embodiments of the present invention may use various wired communication systems such as a public switched telephone network (PSTN), xDSL (x Digital Subscriber Line), RADSL (Rate Adaptive DSL), MDSL (Multi Rate DSL), VDSL (Very High Speed DSL), UADSL (Universal Asymmetric DSL), HDSL (High Bit Rate DSL), and a local area network (LAN).

Additionally, the network presented herein can use various wireless communication systems such as Code Division Multi Access (CDMA), Time Division Multi Access (TDMA), Frequency Division Multi Access (FDMA), Orthogonal Frequency Division Multi Access (OFDMA), Single Carrier-FDMA (SC-FDMA), and other systems.

The network according to embodiments of the present invention can be configured regardless of its communication mode, such as wired or wireless, and can be configured with various communication networks, such as a personal area network (PAN) and a wide area network (WAN). In addition, the network can be the well-known World Wide Web (WWW), and can also use a wireless transmission technology used for short-distance communication, such as infrared (IrDA: Infrared Data Association) or Bluetooth. The technologies described in this specification can be used not only in the networks mentioned above, but also in other networks.

According to an embodiment of the present invention, a user terminal (20) may mean any type of node(s) in a system having a mechanism for communicating with a server (100). The user terminal (20) may be a terminal that can receive information related to a power distribution system through information exchange with the server (100), and may mean a terminal carried by a user. For example, the user terminal (20) may be a terminal related to a manager who monitors field information (status information, current, voltage, presence or absence of a fault) of a power distribution facility in real time and remotely controls the power distribution system based on this. The user terminal (20) may receive, for example, information related to power demand prediction information, fault prediction information, and real-time fault recovery in relation to the power distribution system.

The user terminal (20) may mean any type of entity(ies) in a system having a mechanism for communicating with the server (100). For example, the user terminal (20) may include a personal computer (PC), a notebook, a mobile terminal, a smart phone, a tablet PC, a wearable device, etc., and may include all types of terminals that can connect to a wired/wireless network. In addition, the user terminal (20) may include any server implemented by at least one of an agent, an Application Programming Interface (API), and a plug-in. In addition, the user terminal (20) may include an application source and/or a client application.

According to an embodiment of the present invention, the external server (30) may mean a server that stores information required by the server (100). For example, the external server (30) may be a server related to a Geographic Information System (GIS). The external server (30) may mean a server related to an information processing system that digitizes and processes various geographical information collected from a region, and analyzes and synthesizes the information in various ways according to a user's request and provides it. For example, the external server (30) may store information on the locations of multiple switches included in a distribution line, pole numbers, open/closed states, and connecting lines.

The external server (30) may be a digital device, such as a laptop computer, a notebook computer, a desktop computer, a web pad, or a mobile phone, which may be equipped with a processor and a computing capability equipped with memory. The external server (30) may be a web server that processes a service. The types of servers described above are merely examples, and the present invention is not limited thereto.

According to one embodiment of the present invention, the server (100) can perform analysis on a power network to which a distributed power source (or a distributed power source) is connected. Here, the analysis is related to monitoring of the power network to which the distributed power source is connected, and may include, for example, analysis of fault current or analysis for collecting protection cooperation methods of the distributed power source. For a more specific example, the analysis on the power network may be related to information on a power outage, information on a power supply plan, information on protection cooperation, information on a facility plan, and information on section load management. The specific description of the analysis on the power network described above is only an example, and the present invention is not limited thereto.

Distribution system infrastructure and operation methods (e.g., Distribution Automation System (DAS)) may have many limitations in accommodating a large number of distributed power sources. Since the distribution system is designed and operated for the purpose of supplying power to loads, reverse power flow may occur when additional power sources are connected to the distribution system. If the power flow is unidirectional from the substation to the load, the current flowing in the distribution line may change due to changes in the load, causing voltage fluctuations. Since the voltage monotonically decreases from the substation outlet to the end of the distribution line, voltage regulation of the line can be performed relatively easily using the LDC (Line Drop Compensation) method and the tap adjustment of the transformer. However, if a distributed power source is introduced in the middle of the distribution line and reverse power flow occurs in the power system, it may be difficult to maintain an appropriate voltage because the voltage at the connection point increases. That is, voltage fluctuations may occur due to changes in the power flow and reverse current in distribution lines caused by the interconnection of distributed power sources.

In addition, when distributed power sources are connected, the impedance of the power source decreases, and in the event of an accident, it may become difficult to detect the cause of the failure on the power source side or the distribution protection equipment side.

More specifically, the current distribution system is designed to operate based on one-way power flow in terms of line configuration and protection coordination system, so if multiple distributed power sources that generate reverse power flow are connected to the system, it can cause problems such as system reliability and power quality. In addition, if distributed power sources are connected, it is difficult to determine the actual demand power as the calculation of supply/demand power becomes more complicated, and power factor calculation can also become more complicated.

In particular, in the distribution system, when a specific line fails, the nearest protective device is shut off, and only the part connected to the protective device is powered off. In the case where the protective coordination is not properly performed, problems may occur, such as judging a normal state as a failure and shutting down the line, or not shutting down the line in a shut-off situation. This problem can cause a lot of damage to power demanders, as it can shut down not only the part connected to the protective device, but also the entire region.

In order for the protection device to operate in the protection coordination process, the maximum current and fault current of the installed point must be used to determine the reference point for the blocking. In general, in the case of a one-way system, if only the length of the wire from the fault point to the circuit breaker is known, the fault current can be determined by calculating the impedance. However, in the case of distributed power sources, since a formula is established for each connected power source and a comprehensive calculation is made, the formula is complex and the calculation can be difficult. For example, if 50 to 60 distributed power sources with different patterns are connected, the calculation itself for identifying the fault current can be very difficult.

The server (100) of the present invention can easily perform calculations on the criteria of power demand and protection cooperation when connecting multiple distributed power sources in an existing distribution system. Specifically, the server (100) can generate and provide a single-line diagram reflecting distributed power sources connected to a distribution line. Here, the single-line diagram may be a diagram that simply represents the existence and interconnection relationship of electrical devices as a single line. For example, it may be intended to display general and comprehensive information data on the power system operation status by briefly indicating the connection status of generators, transformers, transmission and distribution lines, circuit breakers, etc. The server (100) can express multiple distributed power sources included in a power system as a simple single-line diagram with the power source as the root. Since the single-line diagram in the present invention can flexibly reflect distributed power sources connected to various locations, when utilizing such a single-line diagram, load calculation and simulation for various analyses (e.g., simulation related to protection cooperation) can be facilitated. That is, the server (100) can generate a single-line diagram that is easy to simulate for load calculation and various analyses in response to a distribution line to which a plurality of distributed power sources are connected, and perform analysis based on the single-line diagram to provide various analysis information corresponding to the power network. The method for the server (100) to generate a single-line diagram in response to a power system to which distributed power sources are connected and to provide various analysis information corresponding to the power network based on the single-line diagram will be described later with reference to FIGS. 2 to 20.

Although only one server (100) is illustrated in FIG. 1, it will be apparent to those skilled in the art that more servers may also be included in the scope of the present invention and that the server (100) may include additional components. That is, the server (100) may be composed of a plurality of computing devices. In other words, a set of a plurality of nodes may constitute the server (100).

According to one embodiment of the present invention, the server (100) may be a server providing a cloud computing service. More specifically, the server (100) may be a server providing a cloud computing service that processes information with another computer connected to the Internet rather than the user's computer, as a type of Internet-based computing. The cloud computing service may be a service that stores data on the Internet and allows the user to use the data or programs required by the user anytime and anywhere through an Internet connection without having to install them on their computer, and allows the data stored on the Internet to be easily shared and transmitted with simple manipulation and clicks. In addition, the cloud computing service may be a service that not only simply stores data on a server on the Internet, but also allows the user to perform desired tasks by utilizing the functions of application programs provided on the Web without having to install a separate program, and allows multiple people to simultaneously share documents and work on them. In addition, the cloud computing service may be implemented in at least one form among IaaS (Infrastructure as a Service), PaaS (Platform as a Service), SaaS (Software as a Service), a virtual machine-based cloud server, and a container-based cloud server. That is, the server (100) of the present invention may be implemented in at least one form among the above-described cloud computing services. The specific description of the cloud computing service described above is only an example, and may include any platform that constructs the cloud computing environment of the present invention.

A specific description of a method for analyzing a power network linked to a distributed power source in the present invention will be described below with reference to FIGS. 2 to 20.

FIG. 2 is a hardware configuration diagram of a server that provides convenience of calculating power demand and protection cooperation criteria in a power system including a distributed power source related to one embodiment of the present invention.

Referring to FIG. 2, a server (100) (hereinafter, “server (100)”) that generates a single-line diagram that provides convenience of calculating power demand and protection cooperation criteria in a power system including a distributed power source according to another embodiment of the present invention may include one or more processors (110), a memory (120) that loads a computer program (151) executed by the processor (110), a bus (130), a communication interface (140), and a storage (150) that stores the computer program (151). Here, only components related to the embodiment of the present invention are illustrated in FIG. 2. Therefore, a person skilled in the art will appreciate that other general-purpose components may be included in addition to the components illustrated in FIG. 2.

The processor (110) controls the overall operation of each component of the server (100). The processor (110) may be configured to include a CPU (Central Processing Unit), an MPU (Micro Processor Unit), an MCU (Micro Controller Unit), a GPU (Graphics Processing Unit), or any other type of processor well known in the art of the present invention.

The processor (110) can read a computer program stored in the memory (120) and perform data processing to generate a single-line diagram that provides convenience in calculating power demand and protection coordination criteria in a power system including a distributed power source according to one embodiment of the present invention.

According to one embodiment of the present invention, the processor (110) can typically process the overall operation of the server (100). The processor (110) can process signals, data, information, etc. input or output through the components described above, or can operate an application program stored in the memory (120) to provide or process appropriate information or functions to a user or a user terminal.

Additionally, the processor (110) may perform operations for at least one application or program for executing a method according to embodiments of the present invention, and the server (100) may have one or more processors.

In various embodiments, the processor (110) may further include a RAM (Random Access Memory, not shown) and a ROM (Read-Only Memory, not shown) that temporarily and/or permanently store signals (or data) processed within the processor (110). In addition, the processor (110) may be implemented in the form of a system on chip (SoC) that includes at least one of a graphics processing unit, a RAM, and a ROM.

The memory (120) stores various data, commands, and/or information. The memory (120) can load a computer program (151) from the storage (150) to execute a method/operation according to various embodiments of the present invention. When the computer program (151) is loaded into the memory (120), the processor (110) can perform the method/operation by executing one or more instructions constituting the computer program (151). The memory (120) may be implemented as a volatile memory such as RAM, but the technical scope of the present disclosure is not limited thereto.

The bus (130) provides a communication function between components of the server (100). The bus (130) can be implemented as various types of buses such as an address bus, a data bus, and a control bus.

The communication interface (140) supports wired and wireless Internet communication of the server (100). In addition, the communication interface (140) may support various communication methods other than Internet communication. To this end, the communication interface (140) may be configured to include a communication module well known in the technical field of the present invention. In some embodiments, the communication interface (140) may be omitted.

Storage (150) can non-temporarily store a computer program (151). When performing a process for generating a single-line diagram through the server (100), storage (150) can store various information necessary to provide a process for generating a single-line diagram.

Storage (150) may be configured to include nonvolatile memory such as ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), flash memory, a hard disk, a removable disk, or any form of computer-readable recording medium well known in the art to which the present invention pertains.

The computer program (151) may include one or more instructions that cause the processor (110) to perform a method/operation according to various embodiments of the present invention when loaded into the memory (120). That is, the processor (110) may perform the method/operation according to various embodiments of the present invention by executing the one or more instructions.

In one embodiment, the computer program (151) may include one or more instructions that cause a method for generating a single-line diagram that provides convenience of power demand calculation and protection coordination criterion calculation in a power system including a distributed power source, the method including the steps of generating a system tree in a vertical structure form based on section information of the system diagram, generating state coordinate information based on the system tree, generating absolute coordinate information based on relative coordinate information, and generating a single-line diagram based on the absolute coordinate information.

The steps of a method or algorithm described in connection with the embodiments of the present invention may be implemented directly in hardware, implemented in a software module executed by hardware, or implemented by a combination of these. The software module may reside in a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a flash memory, a hard disk, a removable disk, a CD-ROM, or any other form of computer-readable recording medium well known in the art to which the present invention pertains.

The components of the present invention may be implemented as a program (or application) to be executed by being combined with a computer as hardware and may be stored in a medium. The components of the present invention may be executed as software programming or software elements, and similarly, the embodiments may be implemented in a programming or scripting language such as C, C++, Java, assembler, etc., including various algorithms implemented as a combination of data structures, processes, routines, or other programming elements. The functional aspects may be implemented as an algorithm executed on one or more processors. Hereinafter, with reference to FIGS. 3 to 20, a method for analyzing a power network linked to a distributed power source performed by a server (100) will be described.

FIG. 3 is a flow chart illustrating a method for generating a single-line diagram according to one embodiment of the present invention. The steps illustrated in FIG. 3 may be changed in order as needed, and at least one or more steps may be omitted or added. That is, the following steps are merely an embodiment of the present invention, and the scope of the rights of the present invention is not limited thereto.

According to one embodiment of the present invention, the server (100) can obtain a system diagram (10). In one embodiment, the system diagram (10) may be a power system diagram related to a power network including a distributed power source. The power system diagram (10) may mean data that represents a power system in a diagram form in order to control and manage the flow of electricity in order to maintain a smooth flow of electricity and quality of electricity. For example, the power system diagram (10) may include linkage information between various nodes, as illustrated in FIG. 6. For example, it may include section information for a section existing between one node and another node. The system diagram illustrated in FIG. 6 is merely an example for understanding the present invention, and the system diagram presented in the present invention is not limited to the system diagram illustrated in FIG. 6.

The acquisition of the system diagram (10) according to one embodiment of the present invention may be receiving or loading the system diagram stored in the memory (120). In addition, the acquisition of the system diagram may be receiving or loading data from another storage medium, another computing device, or a separate processing module within the same computing device based on a wired/wireless communication means.

According to one embodiment of the present invention, the server (100) can generate a system tree in a vertical structure based on section information of the system diagram (10) (S110).

In one embodiment, the section information of the system diagram (10) may include information related to a connection between one or more nodes. For example, referring to FIG. 7, the system diagram (10) may represent a connection relationship between each node from a substation (i.e., CB). One or more nodes included in the system diagram (10) may be the first node to the fifth node. In this case, it may be identified through the system diagram (10) that the first node is connected to the second node, the second node is connected to the third node, and the third node is connected to the fourth to sixth nodes, respectively. Here, the connection from the substation to the fourth node corresponds to a distribution trunk line, and the third node to the fifth node and the third node to the sixth node may correspond to branches. The trunk line may be an important part of a primary distribution line that is connected to a feeder line from a primary distribution line and reaches the vicinity of the center of a receiving point depending on the distribution state of the load, and a branch line may branch from the trunk line. The server (100) can extract interval data of nodes connected to each other in the system diagram (10) and, based on this, generate a system tree (200).

More specifically, the server (100) may create a system tree (200) by making a node related to a reference point the top node and connecting one or more nodes according to a hierarchical level based on the top node. Here, the reference point is, for example, related to the starting point of a system that sends electricity to a power demander, and may mean a substation installed to change the properties of voltage or current in the process of sending electricity. That is, the server (100) may create a system tree (200) having a vertical structure based on connection information on each node based on a substation, as illustrated in FIG. 7.

According to an embodiment, one or more nodes included in the genealogy tree (200) may include a parent node related to an upper node and a child node related to a lower node of the parent node. For example, referring to FIG. 7, a first node may be a parent node of a second node, and the second node may be a child node of the first node.

According to one embodiment, the server (100) can identify whether a branch exists between connected nodes based on the section information of the system diagram (10). A branch refers to a branch line connected to a main line, and may mean that one node is connected to at least two or more nodes. For example, referring to FIG. 7, the third node may be connected to each of the fourth to sixth nodes. In this case, the connection between the third node and the fourth node corresponds to a main line, and the connection between the third node and the fifth node and the connection between the third node and the sixth node may each correspond to a branch. That is, the server (100) can identify that the third node is connected to two or more nodes, and thus determine that a branch exists in the corresponding third node.

If the server (100) identifies that a branch exists between connected nodes, it may create one or more sibling nodes corresponding to the branch at the same level as the child node. More specifically, the third node may be a parent node of each of the fourth to sixth nodes and may be a node corresponding to the branch. In this case, the server (100) may create one or more sibling nodes corresponding to each of the fourth, fifth, and sixth nodes corresponding to the child nodes of the third node. In this case, the sibling nodes of the fourth node may be the fifth and sixth nodes. That is, the fourth to sixth nodes may be sibling nodes formed at the same level (e.g., the same height), as illustrated in FIG. 7.

According to one embodiment, each of the one or more nodes may include point structure information. Here, the point structure information may include first information related to a node ID, second information related to a lower node connection link, third information related to a sibling node connection link, fourth information related to an upper node connection link, and fifth information related to an additional upper node connection link. In a further embodiment, the point structure information may further include connection link information related to a terminal number in the case of an underground line.

According to one embodiment of the present invention, the server (100) can generate relative coordinate information (300) based on the genealogy tree (200) (S120). The server (100) can generate relative coordinate information (300) related to display on the two-dimensional coordinates of nodes based on the genealogy tree (200) generated based on the genealogy diagram (10).

Specifically, the server (100) can set the best node of the system tree (200) as the origin. For example, the system tree (200) can be a hierarchical level with each node connected through a vertical structure based on a reference point. In this case, the reference point of the system tree is related to the system starting point, and can be related to a substation. That is, the server (100) can set the best node related to the system starting point (i.e., a node related to the reference point (e.g., a substation)) as the origin. The origin is related to the center point on a two-dimensional coordinate and can mean (0, 0).

In addition, the server (100) can sequentially position child nodes connected to the top node in the first horizontal direction (e.g., the right direction, the direction in which the x-coordinate becomes positive) to generate a horizontal reference line. The horizontal reference line may be related to a distribution edge of the system diagram.

Referring to Fig. 8 for more detailed explanation, Fig. 8 (a) illustrates an exemplary phylogenetic tree (200). As illustrated in Fig. 8 (a), the top node is a parent node, the first node exists as a child node, the second node exists as a child node with the first node as a parent node, and the third node and the fourth node exist as sibling nodes of the second node. That is, the first node includes two branches (related to the third node and the fourth node). When the phylogenetic tree (200) corresponding to Fig. 8 (a) is to be converted into relative coordinate information (300), the server (100) generates an origin based on the top node. That is, the 0th node can be set to (0, 0). Thereafter, the child nodes connected to the top node can be sequentially connected in the first horizontal direction to generate a horizontal reference line (310). Specifically, the server (100) can generate a horizontal reference line (310) based on the edges of the genealogy tree. In other words, as shown in (b) of FIG. 8, the top node (i.e., the 0th node) can be used as the origin, and the first node and the second node corresponding to the edges can be sequentially connected in the horizontal direction (i.e., the x-axis direction) to generate a horizontal reference line. In other words, the server (100) can generate a horizontal reference line by setting the first node connected to the top node to (1, 0) and setting the second node connected to the first node to (2, 0).

The server (100) may sequentially connect sibling nodes corresponding to the branch to the horizontal reference line when there is a branch in each of the top node and child nodes forming the horizontal reference line. For example, referring to FIG. 8, the third node and the fourth node may be sibling nodes of the second node. As illustrated in (b) of FIG. 8, the server (100) may display the third node and the fourth node by connecting them to the first node forming the horizontal reference line (310). In an embodiment, the server (100) may be characterized by connecting one or more sibling nodes corresponding to the branch to be perpendicular to the horizontal reference line (310). For example, as illustrated in (b) of FIG. 8, the server (100) may vertically connect the third node and the fourth node to the horizontal reference line (310) (i.e., the first node). The server (100) can generate relative coordinate information (300) corresponding to the genealogy tree by connecting the third node to the upper direction of the first node and indicating it as (1, -1), and connecting the fourth node to the lower direction of the first node and indicating it as (1, 1). That is, when there are two branches in the same node, the server (100) can connect the first branch by rotating it 90 degrees, and can connect the second branch by rotating it 180 degrees to the first branch.

According to an additional embodiment, when there are three or more branches in the same node, the server (100) can connect the third branch by rotating it in the 45 degree direction, the fourth branch by rotating it in the 315 degree direction, the fifth branch by rotating it in the 225 degree direction, and the sixth branch by rotating it in the 135 degree direction. The server (100) can generate relative coordinate information (300) by sequentially connecting branches of the same node through angular rotation as described above so that interference between each node is minimized.

According to one embodiment, if there is a branch in the lower nodes corresponding to each of the sibling nodes, the server (100) may connect the lower nodes in a direction perpendicular to the direction of progression of each of the sibling nodes in response to the branch. For a specific example, referring to FIG. 8, although not shown in FIG. 8, the fifth node and the sixth node may be connected to the fourth node. In this case, the sixth node may correspond to a branch to the fourth node. First, the server (100) may set the fifth node in a direction lower than the fourth node according to the existing direction of progression. That is, the coordinates of the fifth node may be set to (1, 2). The server (100) may connect the sixth node in a direction perpendicular to the existing direction of progression of the corresponding node in response to the fourth node corresponding to the branch. For example, the coordinates of the sixth node may be set to (2, 1), and may be connected to the fourth node (e.g., (1, 1)) so as to be parallel to the horizontal reference line (310). That is, the server (100) can determine the display direction of the branched path to be 90 degrees (i.e., vertical direction) from the direction before branching. Accordingly, when a branch occurs for each node, a diagram corresponding to the branch can be made possible. In other words, it can be easily identified whether or not a branch is present based on connection information that is vertical to the direction of progress.

In one embodiment, the server (100) can connect sibling nodes connected to each of the upper nodes located in an upward direction based on the horizontal reference line in an upward direction based on each of the upper nodes. In addition, the server (100) can connect sibling nodes connected to each of the lower nodes located in a downward direction based on the horizontal reference line in a downward direction based on each of the lower nodes.

To explain in more detail, when a branch occurs in nodes located in the upper direction with respect to the horizontal reference line (i.e., when the upper nodes include sibling nodes), the coordinates of the sibling nodes can be set in the vertical direction of the existing progress direction (or connection direction) of the corresponding upper nodes. For a specific example, referring to FIG. 9, upper nodes related to the 7th node, the 8th node, the 9th node, the 10th node, and the 11th node can exist in the upper direction of the horizontal reference line. Here, the 2nd node can be a branch, and thus the 9th node can be positioned in the vertical direction with respect to the progress direction of the 7th node. In addition, the 11th node can exist as a branch of the 9th node. In this case, the 11th node corresponding to the branch (i.e., the 11th node, which is a sibling node of the 10th node) can be connected to the 9th node in the vertical direction of the existing progress direction. In other words, in principle, the 11th node can be connected to the 9th node in the direction of the 4th node. However, the server (100) may be characterized by connecting branches connected to sibling nodes of upper nodes in an upward direction. That is, the server (100) may connect the 11th node in an upward direction rather than a downward direction of the 9th node.

Conversely, sibling nodes connected to each of the subnodes located downward from the horizontal reference line can be connected downward from each of the subnodes.

In summary, the server (100) sets the connection direction for the sibling nodes (or branches) related to the upper nodes and lower nodes, respectively (i.e., the sibling nodes of the upper nodes are connected in an upward direction, and the sibling nodes of the lower nodes are connected in a downward direction), thereby preventing the lower nodes from overlapping with the horizontal reference line in the process of expressing (or converting) them into relative coordinate information. That is, there is an advantage in that the relative coordinate information is generated so that the overlap with the horizontal reference line is minimized through the above-described configuration.

According to one embodiment of the present invention, when overlapping occurs during the process of generating relative coordinate information, the server (100) can reset the coordinates of at least one node among the nodes related to the overlapping.

More specifically, the server (100) can identify overlapping nodes in relation to whether two or more nodes overlap at the same coordinates. An overlapping node may be two or more nodes recorded on one coordinate during the process of generating relative coordinate information based on a genealogy tree.

According to an embodiment, when an overlapping node is identified, the server (100) can identify the number of nodes connected to each of two or more nodes included in the overlapping node. The server (100) can compare the number of nodes connected to each of the overlapping nodes and determine movement of at least one node based on the comparison result. In this case, the server (100) can determine the node related to the movement based on the identified position of the overlapping node.

For a more specific example, the server (100) can identify whether the overlapping node is located at least in one of the upper and lower directions with respect to the horizontal reference line. If the overlapping node is located in the upper direction with respect to the horizontal reference line, the server (100) can identify the number of nodes connected in the upper direction to each node corresponding to the overlapping node. For example, the number of nodes connected in the upper direction to the first node of the overlapping node may be four, and the number of nodes connected in the upper direction to the second node may be three. In this case, the server (100) can determine to move the second node, which has a relatively small number of nodes connected in the upper direction among the overlapping nodes, in the upper direction.

For another example, if the server (100) has an overlapping node positioned downward with respect to a horizontal reference line, the server (100) can identify the number of nodes connected upward to each node corresponding to the overlapping node. For example, the number of nodes connected upward to the third node of the overlapping node may be two, and the number of nodes connected upward to the fourth node may be four. In this case, the server (100) can decide to move the third node, which has a relatively small number of nodes connected downward, downward among the overlapping nodes.

For another example, the server (100) can identify the number of nodes laterally connected to each node corresponding to the overlapping node. For example, the number of nodes connected to the left in the fifth node of the overlapping node may be 1, and the number of nodes connected to the left in the sixth node may be 2. In this case, the server (100) can determine movement to the fifth node among the overlapping nodes, which has a relatively small number of nodes connected to the left. The specific numerical description of the number of nodes connected to each node described above is only an example, and the present invention is not limited thereto.

In other words, the server (100) can determine the node among the nodes corresponding to the overlapping node that has fewer lower nodes in the upper and lateral directions as the node to be moved. In this case, if the overlapping node is upward with respect to the horizontal reference line, the node determined as the node to be moved can be moved upward, and if the overlapping node is downward with respect to the horizontal reference line, the node determined as the node to be moved can be moved downward. In addition, the node among the overlapping nodes that has fewer lower nodes in the lateral direction (left or right) can be moved to the right (i.e., the direction of travel when generating relative coordinate information). In addition, if at least one node among the overlapping nodes is moved, the server (100) can move the lower nodes of the node related to the movement. For example, if the first node among the overlapping nodes is moved upward (i.e., the y-coordinate is moved by -1), all of the lower nodes of the corresponding first node can be moved by -1 in the y-coordinate.

That is, when an overlap between nodes is identified, the server (100) can move a node that includes fewer subordinate nodes to a different coordinate. That is, by moving a node that has relatively fewer subordinate nodes, the possibility of additional overlap can be reduced. In addition, the server (100) can allow movement to a point where the probability of overlap occurrence is minimized depending on the location of the overlapping node in the process of moving at least one node among the overlapping nodes. That is, the server (100) can move at least one node among the nodes included in the overlapping node in the direction of generation of relative coordinate information (at least one direction among the upper, lower, and right directions) depending on the location of each overlapping node.

According to one embodiment of the present invention, when an overlapping node is identified, the server (100) can identify coordinates corresponding to the starting point of each of two or more nodes included in the overlapping node. The coordinates corresponding to the starting point may be coordinates related to the starting point of a transit point located in the horizontal direction of each of the two or more nodes. The server (100) can compare the coordinates identified corresponding to the starting point of each of the two or more nodes, and determine the movement of at least one node based on the comparison result. In this case, the server (100) can determine the node related to the movement based on the identified position of the overlapping node.

For example, the overlapping node may be positioned upward with respect to the horizontal reference line, and may include a first node and a second node. In this case, the coordinate related to the starting point of the passage of the first node may be (3, -2), and the coordinate related to the starting point of the passage of the second node may be (1, -1). The server (100) may identify the y-coordinate related to the starting point of the passage corresponding to each node, and may move upward a node related to a side with a relatively smaller y-coordinate (i.e., located further upward). That is, the server (100) may move upward the first node among the overlapping nodes.

For another example, the overlapping node may be positioned downward with respect to the horizontal reference line, and may include a third node and a fourth node. In this case, the coordinate related to the starting point of the passage of the third node may be (5, 3), and the coordinate related to the starting point of the passage of the fourth node may be (1, 4). The server (100) may identify the y-coordinate related to the starting point of the passage corresponding to each node, and may move the node related to the side with a relatively smaller y-coordinate (i.e., toward the lower side) downward. That is, the server (100) may move the fourth node among the overlapping nodes downward.

For another example, the server (100) may include a fifth node and a sixth node as overlapping nodes. In this case, the coordinate related to the starting point of the passage of the fifth node may be (2, -1), and the coordinate related to the starting point of the passage of the sixth node may be (3, -2). The server (100) may identify the x-coordinate related to the starting point of the passage corresponding to each node, and may move the node related to the side with a relatively large x-coordinate (i.e., located further to the right) to the right. That is, the server (100) may move the sixth node among the overlapping nodes to the right.

That is, when an overlap between nodes is identified, the server (100) can move at least one node to a different coordinate based on the coordinate corresponding to the starting point of the transition point. In this case, when the overlapping node is upward with respect to the horizontal reference line, the node with a higher starting point of the transition point (i.e., a smaller y-coordinate) can be moved upward. In addition, when the overlapping node is downward with respect to the horizontal reference line, the node with a lower starting point of the transition point (i.e., a larger y-coordinate) can be moved downward. Additionally, regardless of whether it is upward or downward with respect to the horizontal reference line, the node with a larger starting point x-coordinate of each transition point of the overlapping nodes (i.e., a node located further to the right) can be moved to the right. That is, the server (100) can move at least one node among the nodes included in the overlapping node in the direction of generation of the relative coordinate information (at least one direction among the upper, lower, and right directions) so that the overlap is resolved, depending on the position of each overlapping node.

According to one embodiment of the present invention, the server (100) can generate absolute coordinate information based on relative coordinate information (S130). Generating absolute coordinate information may be for making all negative numbers in the relative coordinate information positive.

Specifically, the server (100) can obtain the first correction point based on the x-coordinate with the largest absolute value among the x-coordinates of each of the nodes located in the second horizontal direction with respect to the origin of the relative coordinates. Here, the second horizontal direction may mean the left direction (i.e., the direction in which the x-coordinate becomes negative). For example, the relative coordinate information may be connected with an edge in the right direction (i.e., the direction in which the x-coordinate becomes positive) with respect to the origin (0, 0). In an embodiment, a node having a negative x-coordinate on the upper side or the lower right side with respect to the horizontal reference line may be generated depending on the branching of the edge. In this case, the server (100) can obtain the first correction point based on the x-coordinate that is the leftmost with respect to the origin.

Additionally, the server (100) can obtain a second correction point based on the y-coordinate with the largest absolute value among the y-coordinates of each node located in the upper direction with respect to the origin of the relative coordinate information.

That is, the server (100) can obtain correction points (i.e., the first correction point and the second correction point) related to the x and y coordinates with the largest absolute value among the x and y coordinates related to the negative number (i.e., the x and y coordinates related to the largest negative number).

The server (100) can perform coordinate transformation on the relative coordinate information based on the first correction point and the second correction point to generate absolute coordinate information. In other words, the server (100) can process a movement in the right and downward direction by the largest absolute value of the negative number in order to change a negative number (left or top) in the relative coordinate information to a positive number. Accordingly, absolute coordinates can be generated with the upper left corner of the screen as the origin.

According to one embodiment of the present invention, the server (100) can generate a single-line diagram based on absolute coordinate information (S140).

In an embodiment, a single-line diagram may be a simple single-line diagram that represents the existence and interconnection relationship of electrical devices. For example, it may be intended to display comprehensive and overall information data on the operating status of a power system by simply displaying the connection status of a generator, transformer, transmission and distribution line, circuit breaker, etc. The server (100) may express various distributed power sources included in a power system as a simple single-line diagram with the power source as the root. Since such a single-line diagram can flexibly reflect distributed power sources connected to various locations, it has the advantage of being able to more easily perform load calculation and simulations for various analyses (e.g., simulations related to protection cooperation). That is, the server (100) may generate a single-line diagram by extracting only switches according to the open/closed state based on absolute coordinate information. In other words, the single-line diagram may be generated by resetting the parent/child node relationship of the system tree according to the open/closed state of each node and generating a system tree according to the open/closed state based on this. For example, if there is an independent section that is not connected to the CB due to the switch being turned off, the independent section is not supplied with power and can be excluded from the single-line diagram generation process. A single-line diagram showing only such switches not only improves the readability of users, but can also be useful for power outage (report), supply plan review, protection cooperation review, facility planning, and section load management.

Fig. 4 illustrates a flow chart exemplarily showing a process for generating power analysis information related to one embodiment of the present invention. The steps illustrated in Fig. 4 may be changed in order as needed, and at least one or more steps may be omitted or added. That is, the following steps are merely one embodiment of the present invention, and the scope of the rights of the present invention is not limited thereto.

According to one embodiment of the present invention, the server (100) can generate power analysis information through analysis of a system tree. The power analysis information is analysis information related to a power network to which distributed power sources are connected, and may include, for example, at least one of information on power outages, information on power supply methods, information on protection cooperation, information on facility plans, and information on section load management.

Specifically, the server (100) can obtain a power system diagram (10) related to a power network including a distributed power source (S210). The power system diagram (10) may be a power system diagram related to a power network including a distributed power source. The power system diagram (10) may mean data that represents the power system in a drawing form in order to control and manage the flow of electricity in order to maintain a smooth flow of electricity and the quality of electricity.

The acquisition of the system diagram (10) according to one embodiment of the present invention may be receiving or loading the system diagram stored in the memory (120). In addition, the acquisition of the system diagram may be receiving or loading data from another storage medium, another computing device, or a separate processing module within the same computing device based on a wired/wireless communication means.

According to one embodiment of the present invention, the server (100) can generate a system tree in a vertical structure form based on section information of the system diagram (S220). In one embodiment, the section information of the system diagram (10) can include information related to a connection between one or more nodes. More specifically, the server (100) can generate a system tree (200) by making a node related to a reference point a top node and connecting one or more nodes according to a hierarchical level based on the top node. In one embodiment, the reference point can be related to at least one of a substation and a fault point.

According to an embodiment, one or more nodes included in the genealogy tree (200) may include a parent node related to an upper node and a child node related to a lower node of the parent node.

According to one embodiment, the server (100) can identify whether a branch exists between connected nodes based on section information of the system diagram (10). A branch refers to a branch line connected to a main line, and may mean that one node is connected to at least two or more nodes. If the server (100) identifies that a branch exists between connected nodes, it can create one or more sibling nodes corresponding to the branch at the same level as the child node.

According to one embodiment, the system tree may include at least one of a forward system tree and a reverse system tree. Specifically, the server (100) may generate a forward system tree with a substation as the top node. In addition, the server (100) may generate a reverse system tree with a fault point as the top node. That is, the server (100) may generate at least one of a forward system tree and a reverse system tree.

In the embodiment, as shown in FIG. 10, the forward system tree may be a system tree having a substation as the top node. This forward system tree may be utilized to analyze malfunction of a protection device. In addition, the reverse system tree may be a system tree having a fault point as the top node. This reverse system tree may be utilized to analyze malfunction of a protection device and analyze fault current.

To be more specific, a protective device may mean a device that automatically cuts off the power supply when a power distribution line is in an abnormal state (e.g., a fault) to protect the line by detecting a fault. For example, the protective device may include a leakage circuit breaker, Recloser, CB, etc.

Such protective devices may have failures involving at least one of the following: non-operation, in which the protective device does not operate because a failure has occurred but the failure condition cannot be detected; and malfunction, in which the protective device performs unnecessary operations.

According to the embodiment, the malfunction may cause confusion in identifying the fault section due to unnecessary operation of the protective device, and may cause delay in fault recovery. For example, when a line fault occurs, the protective device installed on the load side of the fault section should not operate, but if the fault current generated from the distributed power source connected to the load side of the protective device is greater than the set value, there is a concern that a malfunction may occur in which the protective device, which does not need to operate, is blocked.

The server (100) can generate a reverse system tree based on the system diagram in order to analyze malfunctions of the protection device. To this end, the server (100) can analyze the location of the distributed power source connection based on the fault point. In addition, the server (100) can search for a location to add the distributed power source to the reverse system tree.

More specifically, the server (100) can determine where the distributed power source is connected to the fault point. For example, the distributed power source can be connected to the fault point, the load side of the fault point, or the power side of the fault point. That is, the server (100) can identify that the distributed power source is connected to at least one of the fault point, the load side of the fault point, and the power side of the fault point. In addition, the server (100) can determine whether the distributed power source is related to at least one of low voltage and high voltage.

In an embodiment, the server (100) may determine the connection location of a distributed power source in a reverse power system tree based on the location to which the distributed power source is connected and whether it is low voltage or high voltage.

To explain in detail, as illustrated in FIG. 11, when there is a low-voltage distributed power source linked to a fault point (i.e., a low-voltage distributed power source is linked to the fault point), the server (100) can create a reverse power tree by setting the low-voltage distributed power source as a branch of the fault point.

According to one embodiment, as illustrated in FIG. 12, when a high-voltage distributed power source is connected to the load side of a fault point, the server (100) can create a reverse power system tree by setting the distributed power source as a branch of the fault point.

In one embodiment, when the distributed power source connected to the load side of the fault point is low voltage, it may be characterized by adding one more node between the low voltage distributed power source connected to the fault point, as illustrated in FIG. 12.

In addition, as illustrated in FIG. 13, if it is connected to the load side of the fault point but needs to be inserted into an already registered branch (i.e., in the case of the power side of an already registered distributed power source), the server (100) can create a reverse power tree by setting the corresponding distributed power source as a branch between the fault point and the previously registered distributed power source.

In addition, as illustrated in FIG. 14, when the trunk connection point of the distributed power source is on the load side of the trunk connection point of the fault point, the server (100) can create a reverse system tree by setting the trunk connection point of the fault point as a trunk of the reverse system tree and setting the trunk connection point of the distributed power source as a branch.

According to one embodiment of the present invention, when a distributed power source is connected to the power side of a fault point, the server (100) can create a reverse power tree by inserting the distributed power source into an upper node of a node registered as the power side of the distributed power source, as illustrated in FIG. 15.

As described above, the server (100) can determine the connection location of the distributed power source in the reverse power system tree based on the location where the distributed power source is connected and whether it is low voltage or high voltage. That is, the server (100) can display the connection location of the distributed power source in the process of creating the reverse power system tree based on the fault point, and accordingly, the creation of subsequent power analysis information can be made possible.

In some embodiments, the malfunction may affect the entire line because the fault is not resolved. In such cases of malfunction, the fault current may be smaller than the set value at which the protection device operates. Accordingly, the set value for fault detection may be larger than the maximum load current of the protection device installation location.

Specifically, the server (100) can generate a pure power system tree based on the system diagram in order to analyze the malfunction of the protection device. To this end, the server (100) can analyze the location of the distributed power source connection based on the substation. In addition, the server (100) can search for a location to add the distributed power source to the pure power system tree. In the embodiment, the process of the server (100) generating the pure power system tree can be the same as the process performed in S110 of FIG. 3. That is, the server (100) can generate the system tree based on the section data of the nodes connected to each other in the system diagram.

That is, when the server (100) wants to generate power analysis information related to the malfunction of a protection device, it can generate a reverse power tree based on the fault point, and when it wants to generate power analysis information related to the non-operation of a protection device, it can generate a forward power tree based on the substation. In particular, in the process of generating a reverse power tree based on the fault point, the server (100) can display distributed power sources by linking them in the reverse power tree according to the connected location of the distributed power source and whether it is high or low voltage. This can generate analysis information related to the malfunction of a protection device in a power network where a plurality of distributed power sources are linked. For example, since the calculation of the fault current becomes easier based on the reverse power tree generated based on the fault point, it is possible to obtain meaningful information related to the malfunction of the protection device (e.g., obtaining a reference point for blocking through the fault current).

According to one embodiment of the present invention, the server (100) can generate power analysis information through analysis of a system tree (S230). The server (100) can generate relative coordinate information based on the system tree. In addition, the server (100) can generate absolute coordinate information based on the relative coordinate information. In addition, the server (100) can generate a single-line diagram based on the absolute coordinate information. For features that overlap with the features described above with respect to FIG. 3 among the features of the process in which the server (100) generates a single-line diagram based on the system tree, refer to the contents described in FIG. 4, and the description thereof will be omitted herein.

In one embodiment, the server (100) can generate a single-line diagram based on a lineage tree. Here, the lineage tree can include at least one of a forward lineage tree and a reverse lineage tree. The server (100) can generate a forward lineage single-line diagram based on a forward lineage tree, and can generate a reverse lineage single-line diagram based on a reverse lineage tree.

In addition, the server (100) can generate power analysis information through analysis of a single-line diagram generated based on a system tree. The server (100) can generate power analysis information through analysis of a direct system single-line diagram corresponding to a direct system tree, and can generate power analysis information through analysis of a reverse system single-line diagram corresponding to a reverse system tree. In an embodiment, the server (100) can calculate current, demand power power factor, demand power, etc. corresponding to each switch included in a power network based on at least one of a direct system single-line diagram and a reverse system single-line diagram, and based on this, can generate power analysis information including at least one of information on a power outage, information on a power supply plan, information on protection cooperation, information on a facility plan, and information on section load management.

According to one embodiment of the present invention, the server (100) can generate power analysis information through analysis of a single-line diagram. Specifically, the server (100) can calculate the size and direction of current corresponding to each switch included in the power network, and based on this, can obtain information on demand power from the switch current.

The presence of a current value at a particular switch may mean that power consumption or generation exists after the switch. In other words, the current value measured at the switch may indicate the load (demand or generation) situation after the switch.

In the present invention, the power network that serves as the basis for the analysis of power is a distributed power source, and since the calculation of supply/demand according to the direction of the current becomes complicated, it is difficult to determine the actual demand power, and the calculation of the power factor may also be complicated. In general, the switching current related to one direction (i.e., the switching current when the distributed power source is not connected) can be calculated using the following equation.

Switch current =

That is, in the case where the distributed power source is not connected, the switch current can be calculated through the composite value of the active current and reactive current flowing in the switch.

In the case where a distributed power source is connected to the load side of the switch, the switch current can be the composite value of the current obtained by subtracting the distributed power generation amount from the demand power, as in the following equation.

Switch current =

In addition, when distributed power sources are not connected, the total power demand of the line can be calculated by adding the power demand of high-voltage and low-voltage customers, and can be expressed using the following equation.

Track demand power =

Also, if the distributed power source is not connected, the power factor ( ) can be calculated using the following formula.

Power factor ( ) = = Active power /

However, if there are low-voltage customers after the switch, it may be difficult to determine the low-voltage demand power (i.e., low-voltage demand active power and low-voltage demand reactive power), making it difficult to calculate the switch current, total demand power, and power factor.

According to one embodiment of the present invention, the server (100) can calculate the switching current, power factor, and demand power even when a distributed power source is connected.

In one embodiment, the server (100) can calculate the switch current using the following formula when there are no low-voltage customers after the switch.

Switch current =

In the above equation, high voltage may mean the active and reactive power related to high voltage demand, and DR may mean the power generation of the distributed power source. That is, in the case where there is no low voltage customer, the server (100) may have a switch current as a composite value of the current obtained by subtracting the power generation of the distributed power source from the high voltage demand power.

Additionally, in one embodiment, the server (100) can calculate the switch current (I _sw ) using the following equation when there is a low-voltage customer after the switch.

I _sw =

These formulas can be summarized as follows.

For convenience of organization, each power in the formula is expressed as follows.

High voltage effective power: , high voltage reactive power: , distributed power source effective power: , Distributed power reactive power: , low pressure effective power: = and low pressure reactive power: =

(I _sw ) ² =

(I _sw ) ² = [Formula 1]

Here, In the process of calculating the power factor as follows, k( ) - can be defined as

Specifically, the power factor can be solved using the following formula.

Power factor ( ) =

-> = /

-> 1 + = -> 1 + =

-> = x

-> = x =

∴ = = k( ) -

in other words, = k( ) - It can be defined as , and this can be applied to [Formula 1] and organized into the following formulas.

(I _sw ) ² =

=

Here, C = , and D = It could be.

(I _sw ) ^{2 =} = (1+

-> (1+ = 0 [Formula 2]

According to an embodiment, it is possible to determine whether there is a forward or reverse current using the root formula based on [Formula 2].

ax ² + bx + c = 0

(root formula) =

In a specific embodiment, the server (100) can determine that the current is positive if one of the result values is positive and the other is negative based on the result of the root formula execution based on [Formula 2]. Specifically, the server (100) can determine that the variable value corresponding to the formula is >0, If <0, it can be judged as a pure current.

In this case, the server (100) By substituting each variable corresponding to (i.e., low-pressure demand effective power) can be calculated, and the calculated Based on (i.e. low pressure demand reactive power) is calculated. = ) can be done.

In another embodiment, the server (100) may determine that the reverse current is present if all the result values of the root formula execution result based on [Formula 2] are positive. Specifically, the server (100) may determine that the variable values corresponding to the formula are >0, If >0, it can be judged as a reverse current.

In this case, the server (100) By substituting each variable corresponding to (i.e., low-pressure demand effective power) can be calculated, and the calculated Based on (i.e. low pressure demand reactive power) is calculated. = ) can be done.

In summary, the server (100) can determine whether there is a forward or reverse flow based on the result of the root formula execution based on [Formula 2]. In addition, if the server (100) determines that there is a forward flow, Based on this, the low-pressure demand power (valid and invalid) is calculated, and if it is judged to be reverse current, Based on the formula, the low-voltage demand power (active and reactive) can be calculated.

The server (100) can calculate low-voltage demand power (i.e., low-voltage demand active power and low-voltage demand reactive power) in response to each of the forward and reverse current situations, and thus can calculate the total demand power and power factor of the line.

As described above, the server (100) can determine the direction of the switch current and calculate the power factor and demand power according to the direction even when the distributed power source is connected. That is, the active current and reactive current related to the low-voltage demand can be calculated and it can identify who supplies power at the corresponding switch location, so the load status related to the corresponding location can be identified. In addition, the server (100) can generate power analysis information based on the calculated information. The power analysis information is analysis information related to the power network to which the distributed power source is connected, and can include, for example, at least one of information on a power outage, information on a power supply plan, information on protection cooperation, information on a facility plan, and information on section load management.

FIG. 5 is a flow chart illustrating a method for synchronizing system information between a distribution automation system and a geographic information system according to one embodiment of the present invention. The steps illustrated in FIG. 5 may be changed in order as necessary, and at least one or more steps may be omitted or added. That is, the following steps are merely an embodiment of the present invention, and the scope of the rights of the present invention is not limited thereto.

A series of facilities that produce electricity and supply it to users is called a power system (or power network). The power system is composed of various facilities, and can be largely composed of power generation facilities, transmission facilities, substation facilities, and distribution facilities. The power automation system can include a system that remotely monitors and controls the above facilities that make up the power system.

These power automation systems may include an energy management system (EMS) that controls the demand, supply, and transportation of overall energy, a supervisory control and data acquisition (SCADA) system that supervises and controls transmission and substation facilities, a distribution automation system (DAS) that manages and operates distribution system facilities, and an automatic meter reading (AMR) system that remotely reads the meters of consumers.

In the embodiment, the current domestically operated distribution system (or distribution automation system) can only remotely monitor and control the switches installed on the distribution line. Meanwhile, the distribution intelligence system may refer to a system capable of remotely monitoring and controlling all power facilities from the substation to the distribution system and consumers. The distribution intelligence system can manage high and low voltage distribution facilities on a GIS basis, and perform the function of integrated operation of distribution lines by linking distributed power sources with systems such as SCADA, DAS, AMR, and TCS (Trouble Call System). For example, it can enable optimized operation of the distribution system, such as minimizing loss of the distribution system, load equalization, voltage and reactive power control, and power quality management, through a transformer with built-in diagnostic sensors, a voltage controller, and a power quality controller.

However, since the current distribution intelligence system does not link the geographic information system (GIS) and power system information, it may be difficult to integrate them to create and manage a distribution system (i.e., a power network). Accordingly, the server (100) of the present invention can check and harmonize the system between the geographic information system (GIS) and the distribution automation system (DAS) in order to implement a distribution line integrated operation function distribution intelligence system that links distributed power sources with systems such as SCADA, DAS, AMR, and TCS.

According to one embodiment of the present invention, the server (100) can convert a first single-line diagram related to a distribution automation system into a tree structure to generate first tree structure information (S310). The distribution automation system can include a comprehensive system that can reduce power outage sections and shorten power outage times by remotely controlling and acquiring and monitoring field information of distribution facilities in real time through electric and electronic communication devices. Monitoring and control of distribution line switches can be performed through the distribution automation system.

The first single-line diagram may be a single-line diagram generated through information acquired in real time on-site through a distribution automation system, for example, as illustrated in (a) of FIG. 16. In an embodiment, the distribution automation system may be characterized by registering a system based on a user's input. That is, the first single-line diagram generated through information acquired from the distribution automation system may be generated based on a system registered based on a user's input. The server (100) may convert this first single-line diagram into a tree structure to generate first tree structure information. For example, the server (100) may generate a first tree structure as illustrated in (a) of FIG. 17 based on the first single-line diagram illustrated in (a) of FIG. 16.

According to one embodiment of the present invention, the server (100) can convert a second-line diagram related to a geographic information system (GIS) into a tree structure to generate second-tree structure information (S320). The geographic information system can include an information system that processes and manages geographic information, that is, spatially distributed information. The server (100) can convert this second-line diagram into a tree structure to generate second-tree structure information. For example, the server (100) can generate a second tree structure as shown in (b) of FIG. 17 based on the second-line diagram as shown in (b) of FIG. 16.

The tree structure may be a structure in which a node related to a reference point is the top node, and one or more nodes are connected downwards according to a hierarchical level based on the top node. One or more nodes may include a parent node related to the upper node and a child node related to the lower node of the parent node.

According to an embodiment, the system information included in each system may include information on at least one of a distribution line ID, a line name, a computerized number, a device type, a terminal number, an open/closed state, and whether it is automated.

According to one embodiment, the reason why the server (100) changes each single-line diagram (i.e., the first single-line diagram and the second single-line diagram) into each tree structure may be to compare and match each system information. That is, by changing each single-line diagram into each tree structure, the server (100) can perform an inspection or comparison of the systems of each system.

According to one embodiment, the first-line diagram related to the distribution automation system (DAS) can be used as a reference for comparing the systems of each system, since it is registered in the system based on the user's input (i.e., the user's manual work), as described above. In other words, the second-line diagram can be modified based on the first-line diagram.

According to one embodiment of the present invention, the server (100) performs a comparison of the first tree structure information and the second tree structure information, and can modify system information related to at least one of the distribution automation system and the geographic information system according to the comparison result (S330).

Specifically, the server (100) can perform a comparison for each tree structure information corresponding to each connected hierarchical level starting from the top node of each tree structure information. That is, the server (100) can compare the connection information of each tree structure information in order based on the substation CB.

According to an embodiment, the server (100) may perform a comparison for each tree structure information based on whether a branch exists at a corresponding level of each tree structure information.

Comparison can be performed by checking whether a branch exists at the same location (i.e., at the same level) corresponding to each of the first tree structure information and the second tree structure information. According to an embodiment, identifying whether a branch exists can be important for comparing lower nodes on each structure. For example, if a branch exists at the same level, since each node corresponding to the branch includes different nodes as lower nodes, comparison of lower nodes can be performed depending on whether there is a branch.

In one embodiment, the server (100) can move to a lower level and perform a comparison if there is no branch in both the first tree structure information and the second tree structure information corresponding to the same level. That is, if there is no branch, a comparison between nodes at the same level corresponding to each tree structure can be performed, and if there is a match, the server can move to the next level and perform a comparison for nodes between each tree structure.

That is, if there is no branch in both the first tree structure information and the second tree structure information (i.e., there are no sibling nodes in both with respect to the corresponding position (level)), the lineage is consistent, so a sequential comparison can be performed for the nodes below.

If there are branches in both the first tree structure information and the second tree structure information corresponding to the same level, the server (100) can adjust the branch information of the second tree structure information based on the branch information of the first tree structure information. That is, if there are all sibling nodes in relation to the same position (level) in the system of each system, the server (100) can adjust the branch information of the second tree structure information based on the branch information of the first tree structure information. In other words, the branch information of the second tree structure information can be adjusted based on the corresponding branch information of the first tree structure information. In the embodiment, the first tree structure information is related to a distribution automation system (DAS) in which a system is registered based on a user's input (i.e., a user's manual work), and therefore, it can be a criterion for comparing the systems of each system.

Specifically, the server (100) can adjust the branch information of the second tree structure information based on the comparison between the sub-tree cumulative scores corresponding to each tree structure information at the corresponding level. That is, the server (100) can calculate the sub-tree cumulative scores of each node corresponding to each branch, and adjust the branch information of the second tree structure information based on the calculated sub-tree cumulative scores. In other words, the server (100) can compare the sub-tree cumulative scores and perform adjustments to the second tree structure information so that they correspond to the same sub-tree cumulative scores.

For a specific example, referring to FIG. 17, it can be seen that the first tree structure information and the second tree structure information do not match the edges and branches at the fourth level where the third, fifth, and ninth nodes are located. That is, the second tree structure information may need to be modified based on the edges and branches indicated in the first tree structure information. To this end, the server (100) may calculate a sub-tree cumulative score corresponding to each node located at a level where a branch exists, and may modify the second tree structure information to correspond to the first tree structure information through a comparison of the calculated sub-tree cumulative scores.

For example, in the first tree structure information, the subtree cumulative score of the third node located at the far left of the fourth level may be 4, the subtree cumulative score of the fifth node may be 15, and the subtree cumulative score of the ninth node may be 15. In addition, in the second tree structure information, the subtree cumulative score of the fifth node located at the far left of the fourth level may be 15, the subtree cumulative score of the third node may be 4, and the subtree cumulative score of the ninth node may be 15. In this case, the server (100) may compare the subtree cumulative scores corresponding to each node of each tree structure information, and modify the second tree structure information to correspond to the first tree structure information. That is, the server (100) may cause the third node with the subtree cumulative score of 4 in the second tree structure to move to the far left, and cause the fifth node with the subtree cumulative score of 15 to be positioned in the middle. In other words, the server (100) can modify the second tree structure information so that the cumulative scores of each subtree are arranged as 4, 15, and 15 based on the first tree structure information. That is, edges and branches incorrectly expressed in the second tree structure information can be correctly displayed. The specific numerical description of the cumulative scores of the subtrees of the nodes included in each of the tree structures described above is only an example, and the present invention is not limited thereto.

The subtree cumulative score may be calculated by summing the tree scores of the lower nodes. Specifically, if there is no sibling node, or if there is a sibling node but it is a node located at the far left of the same level of the tree structure, the tree score may be generated based on the parent node score corresponding to the upper node and the current corresponding level score. In addition, if it is a node that includes a sibling node on the left corresponding to the same level of the tree structure, it may be generated based on the current corresponding level score and the tree score of the sibling node located on the left. The subtree cumulative score may be calculated by summing the tree scores of each of the lower nodes including itself.

For a specific example, referring to (a) of FIG. 18, the T node is a top-level node and has no parent node, so the tree score can be '1'. The server (100) can calculate the tree score as '3' (i.e., 1+2) based on the score of the parent node being '1' and the current level being '2' in response to the first node. The server (100) can calculate the tree score as '6' (i.e., 3+3) based on the score of the parent node being '3' and the current level being '3' in response to the second node. In addition, the server (100) can calculate the tree score as '9' (i.e., 3+6) based on the current level being '3' and the score of the sibling node located on the left being '6' in response to the third node. In addition, the server (100) can calculate the tree score as '10' (i.e., 10) based on the score of the parent node being '6' and the current level being '4' in response to the fourth node. In this case, the server (100) can calculate the subtree cumulative score by adding up the tree scores corresponding to each node. The server (100) can calculate the server tree cumulative score as 29 (i.e., 1+3+6+9+10).

In one embodiment, the server (100) may check the subtree cumulative score for each branch of each tree structure information to identify a matching branch whose subtree cumulative scores match each other when there is no branch in the first tree structure information corresponding to the same level and a branch in the second tree structure information, or when there is a branch in the first tree structure information corresponding to the same level but no branch in the second tree structure information. The server (100) may perform a check for matching branches corresponding to the same level and process branches that are not matching branches as mismatches. That is, the server (100) may perform a check only corresponding to matching branches and process all remaining branches (i.e., branches with different subtree cumulative scores) as mismatches.

That is, the server (100) can identify matching branches in response to whether a branch occurs by introducing the concept of a subtree cumulative score corresponding to each node included in each tree structure information. In addition, the server (100) can modify each tree structure information based on the matching branches, thereby harmonizing the system in each system.

In additional embodiments, the subtree cumulative score may include a node count score for additional validation of the matching branch. The node count score may be computed for additional validation of the matching branch.

For example, depending on the number of cases, the form of the branch may be different, but the same subtree cumulative score may be produced. In other words, since duplication may occur depending on the case, if the match is determined simply through the subtree cumulative score, there may be a possibility that different nodes may be determined to be the same node.

For a more specific example, referring to FIG. 18, although the branching forms of each tree structure are different, the calculated subtree cumulative scores may be the same. Specifically, the subtree cumulative score corresponding to the tree structure corresponding to (b) of FIG. 18 may be 29. Specifically, the T node is the top node and has no parent node, so the tree score may be '1'. The server (100) may calculate the tree score as '3' (i.e., 1+2) based on the fact that the score of the parent node corresponding to the first node is '1' and the current level is '2'. The server (100) may calculate the tree score as '5' (i.e., 2+3) based on the fact that the current level is '2' and the score of the sibling node located on the left is '3' corresponding to the second node. In addition, the server (100) can calculate the tree score as '8' (i.e., 5+3) based on the tree score of the parent node being '5' and the current level being '3' in response to the third node. In addition, the server (100) can calculate the tree score as '12' (i.e., 8+4) based on the tree score of the parent node being '8' and the current level being '4' in response to the fourth node. In this case, the server (100) can calculate the subtree cumulative score by adding up the tree scores corresponding to each node. The server (100) can calculate the server tree cumulative score as 29 (i.e., 1+3+5+8+12).

That is, each of (a) and (b) of Fig. 18 may have different branching forms but may have the same subtree cumulative score. If the server (100) performs a comparison between the phylogenetic tree information corresponding to each system based only on the subtree cumulative score, there is a risk of an error occurring. Accordingly, the server (100) may calculate a node count score for performing additional verification.

The node count score can be calculated by the sum of the first tree scores calculated for each of the lower nodes with the node itself as the top node. Here, the first tree score can be characterized in that it is determined by adding a first setting value in relation to the hierarchical level based on the top node of each tree structure information, and adding a second setting value in relation to one or more sibling nodes corresponding to the same level of each tree structure information.

Here, the first setting value and the second setting value may be related to different place values. For example, if the first setting value is a number related to the ones place (e.g., 1), the second setting value may be a number related to the hundreds place (e.g., 100).

For a more specific example, referring to (a) of FIG. 19, a T node may be a top node and have a first tree score of '1'. The server (100) may calculate the first tree score as '2' based on the score of the parent node being '1' corresponding to the first node and adding a first setting value (e.g., 1) according to the level. The server (100) may calculate the first tree score as '3' based on the score of the parent node being '2' corresponding to the second node and adding the first setting value according to the level. In addition, the server (100) may calculate the first tree score as '103' based on the first tree score of the sibling node including a sibling node on the left corresponding to the third node. Additionally, the server (100) can calculate the first tree score as '4' based on the score of the parent node being '3' corresponding to the fourth node and adding the first setting value according to the level.

In this case, the server (100) can calculate the node count score by adding the first tree scores corresponding to each node. The server (100) can calculate the node count score as 113 (i.e., 1+2+3+103+4).

Also, referring to (b) of FIG. 19, the T node may have a tree score of '1' as a top node. The server (100) may calculate the first tree score as '2' based on the score of the parent node being '1' corresponding to the first node and adding a first setting value (e.g., 1) according to the level. The server (100) may calculate the first tree score as '102' based on the score of the second node including a sibling node on the left and adding a second setting value to the first tree score of the sibling node. Also, the server (100) may calculate the first tree score as '103' based on the score of the parent node being '102' corresponding to the third node and adding the first setting value according to the level. Additionally, the server (100) can calculate the first tree score as '104' based on the score of the parent node corresponding to the fourth node being '103' and adding the first setting value according to the level.

In this case, the server (100) can calculate the node count score by adding the first tree scores corresponding to each node. The server (100) can calculate the node count score as 312 (i.e., 1+2+102+103+104).

That is, referring to (a) and (b) of Fig. 19, when the subtree cumulative score is utilized to identify matching branches between tree structure information corresponding to each system, there may be a possibility that the branches may be recognized as the same even if the branch shapes are different. On the other hand, when the node count score is utilized, since each branch shape has a different output value, it is possible to prevent errors from occurring in the process of identifying matching branches.

According to an embodiment, when identifying a matching branch, the server (100) can identify a node count score corresponding to each piece of tree structure information. The server (100) can determine whether the matching branch is appropriate by comparing the node count scores corresponding to each piece of tree structure information.

That is, the server (100) can identify matching branches in response to whether a branch occurs by introducing the concept of a subtree cumulative score corresponding to each node included in each tree structure information. In addition, the server (100) can identify matching branches by performing additional verification using the node count score when the subtree cumulative scores match. In addition, the server (100) can modify each tree structure information based on the matching branches.

Specifically, as illustrated in FIG. 20, the server (100) can adjust the branch information of the second tree structure information based on the branch information of the first tree structure information to harmonize the systems in each system. Accordingly, since the geographic information and the power system information can be linked to each other, they can be integrated to create and manage a distribution system (i.e., a power network). In other words, it can be possible to implement a distribution line integrated operation function distribution intelligence system that links distributed power sources with systems such as SCADA, DAS, AMR, and TCS.

According to one embodiment of the present invention, the server (100) can generate a diagnosis result report based on a comparison of first power system information related to a distribution automation system and second power system information related to a geographic information system.

The diagnosis result report is information for making the user aware of the difference between the power system information corresponding to each system, and can be generated based on the comparison results between the power system information related to each system. The diagnosis result report can include information related to the power system information recorded differently from each other. For example, the diagnosis result report can include information for making the user aware that the pole number is recorded differently in the distribution automation system and the geographic information system for the first switch located in a specific section.

For a specific example, the diagnosis result report may include a first power system information display area (S10) and a second power system information display area (S20), as illustrated in Fig. 21. In this case, the diagnosis result report may be characterized in that separate highlighting is applied corresponding to different system information.

Referring to FIG. 21, in the case of the first power system information display area (S10) related to the distribution automation system, the computerized number is recorded as '3795B571' corresponding to the pole number 'Chunggi 214', but in the case of the second power system information display area (S20) related to the geographic information system, the computerized number may be unrecorded (null) corresponding to the same pole number 'Chunggi 214'. In this case, the server (100) may identify that the recorded information in each grid information display area is different and may highlight the unrecorded portion as shown in FIG. 21. Through this highlighting, the user can easily identify the inconsistent portion between the two systems.

For another example, referring to FIG. 21, in the second power system information display area (S20), multiple power pole numbers below the pole number 'Chunggi S115' and information corresponding to each pole number are recorded, but in the first power system information display area (S10), information corresponding to the pole number 'Chunggi S115' and the pole numbers below the corresponding column may not be recorded (S30). Through this diagnosis result report, the user can easily identify information that is not recorded in each system, i.e., missing information.

As another example, the diagnosis result report may be characterized in that, as illustrated in FIG. 22, highlighting is applied to information on different computerized numbers in each of the first power system information display area (S10) and the second power system information display area (S20). For example, since the computerized number is manually input into the system by the user, errors may occur during the input process. The diagnosis result report may provide each display area by applying highlighting to the computerized numbers that are recorded differently from each other so that they can be easily identified when the computerized numbers recorded in relation to each system are input differently from each other.

For example, if a diagnostic result report such as the above is not provided, manual processing is inevitable because the user must search or identify the serial number on each system and compare information on both systems.

As described above, the server (100) provides a diagnostic result report that includes power system information corresponding to each of the distribution automation system and the geographic information system, but allows for easier identification of different information, thereby providing convenience for users to manage each system in a consistent manner.

According to one embodiment of the present invention, the server (100) may provide an analysis tool related to power analysis information. Specifically, the server (100) may provide an analysis tool that visually and easily displays information related to power analysis information, receives setting values for performing various simulations on a power network, and calculates and provides a result value accordingly to a user. This analysis tool may be related to a user interface for receiving a setting value input from a user and calculating and displaying an output value corresponding thereto. A more specific description of the analysis tool will be described below with reference to FIGS. 23 to 27.

According to one embodiment, the analysis tool can display a single-line diagram generated corresponding to a power network. For example, the single-line diagram displayed through the analysis tool can be as illustrated in FIG. 23. In the embodiment, the single-line diagram illustrated in (a) of FIG. 23 can be a single-line diagram related to a distribution automation system, and the single-line diagram illustrated in (b) of FIG. 23 can be a single-line diagram related to a geographic information system. The server (100) can display single-line diagrams related to each system by comparing them with each other through the analysis tool as illustrated in FIG. 23. Referring to FIG. 23, it can be confirmed that different parts in both systems are visually recognized as different parts in both systems are displayed through the single-line diagram. That is, by expressing the system data related to each system in the same data structure (e.g., single-line diagram), the comparison of the system structures between each system can be facilitated. Accordingly, the user can compare the inconsistent parts in each system relatively easily by comparing the single-line diagrams corresponding to both systems.

According to one embodiment, the interpretation tool may allow for various visual representations when providing a single-line diagram. The visual representation may mean visual information expressed on the single-line diagram to allow the user to more intuitively recognize the interconnection characteristics of the system.

For example, each switch can be represented by a different shape on the single-line diagram depending on the operating method. Referring to Fig. 24, a switch that can be turned on/off remotely can be represented by a circle on the single-line diagram, and a switch that can be turned on/off manually can be represented by a square.

For another example, a switch that is turned on in the grid can be indicated with a green color, and a switch that is turned off in the grid can be indicated with a red color.

As another example, the current value corresponding to each switch can be displayed and provided on the single-line diagram. In this case, the corresponding current value of each switch can be expressed as a negative or positive number depending on the direction of the current. For example, in the case of a switch corresponding to a reverse current, the current value can be displayed as a negative number.

For example, the color of the line for each section can be displayed differently based on who supplies power at a specific location in the single-line diagram. For example, referring to Fig. 24, in the case of line supply, the color of the line can be displayed in blue, in the case of distributed power supply, the color of the line can be displayed in green, and in the case of simultaneous supply (i.e., both line and distributed power supply), the color of preference can be displayed in orange. In other words, by analyzing the customer distribution and distributed power output and displaying the single-line diagram with different visual representations for each section, it can be made easy to identify the power supply.

In addition, as illustrated in Fig. 24, information related to current, voltage, switch name, demand source, etc. can be displayed in connection with each section. The specific descriptions of the single-line diagram display method or visual expression described above are only examples to help understand the present invention, and the present invention is not limited to the above-described descriptions.

These visual representations allow users to perceive information about the system status more intuitively.

According to one embodiment of the present invention, the analysis tool can provide various simulation functions based on a single-line diagram. For example, the analysis tool can provide a simulation function related to a change in demand for a distribution line, a simulation function related to new installation of equipment, or a simulation function related to distributed power source fault current analysis and protection cooperation.

In an embodiment, the analysis tool may receive demand fluctuation information related to a specific switch related to a user's input, and perform a simulation related to the demand fluctuation based on the demand fluctuation information. For example, the user may select a specific distributed power source in a single-line diagram, and input a changed setting value for the power generation amount (e.g., an increased power generation amount compared to before) for the distributed power source. The analysis tool may perform a simulation to monitor whether an overvoltage occurs due to an increase in the power generation amount based on the changed setting value input by the user. In other words, by utilizing the analysis tool, it is possible to detect whether an overvoltage or undervoltage occurs due to a change (increase or decrease) in the power generation amount of a distributed power source in a specific section.

In addition, in the embodiment, the analysis tool can perform a simulation to analyze the ripple effect related to the case where the system is changed. For example, the simulation related to the analysis of the ripple effect due to the system change can be a simulation that can be utilized when the system is changed due to a line failure, work, or new line construction. Referring to Fig. 25, the user can input a switch selection setting value for the system change corresponding to a specific section. In this case, the setting value can include information on whether the switch is on the power side or the load side, information on the switching load, information on the amount of power generation, and information on the current. Based on the information input by the user, the analysis tool can perform a simulation related to the ripple effect that may occur in the surroundings when the system is changed corresponding to a specific section.

In addition, in the embodiment, the analysis tool can provide a simulation related to the installation of new facilities. The simulation related to the installation of new facilities can be used to test the current, voltage, and flow fluctuations in advance when a new customer is connected to the line. The simulation related to the installation of new facilities can be used to review the supply plan for new facilities and the technology for linking high-voltage distributed power sources.

Referring to FIGS. 26 and 27, the analysis tool may provide an input window related to adding new facilities, and may perform a simulation based on setting values input by the user through the input window. For example, when a specific section is selected on a single-line diagram and setting values for customer name, power, and distance are input, the analysis tool may display a 'new customer' by connecting it to a specific section on the single-line diagram based on the setting values, as illustrated in FIG. 27, and provide information on system characteristics according to the connection. That is, as illustrated in FIG. 27, a simulation result related to the flow analysis result may be provided. In the above description, the installation of a high-voltage customer was described as an example, but the simulation related to the installation of facilities may further include simulations related to various new facilities (e.g., the installation of a high-voltage distributed power source).

In addition, in the embodiment, the analysis tool can perform a simulation related to the analysis of a fault current of a distributed power source. The simulation related to the analysis of a fault current can be a simulation that calculates a fault current by assuming a fault in an arbitrary facility. The analysis tool can perform a simulation related to protection cooperation. The simulation related to protection cooperation can include a simulation related to the analysis of the non-operation and malfunction of a protection device due to the distributed power source. The non-operation of a protection device can mean that a fault has occurred but the protection device does not operate, and the malfunction of a protection device can mean that unnecessary operations are performed.

For example, in the case of analysis of malfunction of protection devices due to distributed power sources, this may be a simulation that assumes a high-resistance ground fault at the end of the line, calculates a fault current, and confirms whether the potential protection device closest to the fault point operates. In addition, for example, in the case of analysis of malfunction of protection devices due to distributed power sources, this may be a simulation that assumes a fault in a protection device (on the power side or the load side), calculates a fault current, and confirms whether the protection device operates by the distributed power source on the load side. The specific description of the simulation method related to the aforementioned malfunction and non-operation is only an example, and the present invention is not limited thereto.

As described above, the server (100) can easily display a power network in which distributed power sources are connected through an analysis tool in a single-line diagram so that the readability of the user can be improved, and can provide various simulation functions based on the single-line diagram. In other words, information related to various grid connection situations including distributed power sources can be provided through a simulation utilizing the analysis tool, so that the convenience of the user can be improved.

The steps of a method or algorithm described in connection with the embodiments of the present invention may be implemented directly in hardware, implemented in a software module executed by hardware, or implemented by a combination of these. The software module may reside in a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a flash memory, a hard disk, a removable disk, a CD-ROM, or any other form of computer-readable recording medium well known in the art to which the present invention pertains.

The components of the present invention may be implemented as a program (or application) to be executed by being combined with a computer as hardware and stored on a medium. The components of the present invention may be executed as software programming or software elements, and similarly, the embodiments may be implemented in a programming or scripting language such as C, C++, Java, assembler, etc., including various algorithms implemented as a combination of data structures, processes, routines, or other programming elements. Functional aspects may be implemented as algorithms that are executed on one or more processors.

Those skilled in the art will appreciate that the various illustrative logical blocks, modules, processors, means, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, various forms of program or design code (referred to herein for convenience as “software”), or a combination of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Those skilled in the art may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The various embodiments presented herein can be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" includes a computer program, a carrier, or a medium that is accessible from any computer-readable device. For example, computer-readable media include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, magnetic strips, etc.), optical disks (e.g., CDs, DVDs, etc.), smart cards, and flash memory devices (e.g., EEPROMs, cards, sticks, key drives, etc.). In addition, the various storage media presented herein include one or more devices and/or other machine-readable media for storing information. The term "machine-readable media" includes, but is not limited to, wireless channels and various other media that can store, retain, and/or transmit instructions(s) and/or data.

It is to be understood that the specific order or hierarchy of steps in the processes presented is an example of exemplary approaches. It is to be understood that the specific order or hierarchy of steps in the processes may be rearranged within the scope of the present invention based on design priorities. The appended method claims provide elements of various steps in a sample order, but are not meant to be limited to the specific order or hierarchy presented.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the disclosed invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the disclosed invention. Thus, the disclosed invention is not intended to be limited to the disclosed embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (12)

A method performed on one or more processors of a computing device,
A step of obtaining a schematic diagram related to a power network including distributed power sources;
A step of generating a system tree in the form of a vertical structure based on the section information of the above system diagram; and
A step of generating power analysis information through analysis of the above system tree; including;
The section information of the above system diagram is:
Contains information regarding connections between one or more nodes,
The steps for generating the above phylogenetic tree are:
A step of creating a genealogical tree by making a node related to a reference point the highest node and connecting one or more nodes according to a hierarchical level based on the highest node; including;
One or more nodes included in the above genealogy tree include a parent node related to an upper node and a child node related to a lower node of the parent node.
A method for analyzing a power network including distributed power sources.
delete In the first paragraph,
The steps for generating the above phylogenetic tree are:
A step of identifying whether a branch exists between connected nodes based on the above section information; and
If the above branch exists, a step of creating one or more sibling nodes corresponding to the branch at the same level as the child node;
Including,
A method for analyzing a power network including distributed power sources.
In the first paragraph,
The above reference point is,
At least one of the substations and fault points is involved,
The above phylogenetic tree is,
Including a forward system tree with the substation as the top node and a reverse system tree with the fault point as the top node.
A method for analyzing a power network including distributed power sources.
In paragraph 4,
The steps for generating the above phylogenetic tree are:
a step of generating the above phylogenetic tree; and
A step of generating the above inverse phylogenetic tree;
Contains at least one of:
The above-mentioned phylogenetic tree is used to analyze malfunctions of protective devices.
The above reverse system tree is used for the analysis of the malfunction and fault current of the protective device.
A method for analyzing a power network including distributed power sources.
In paragraph 5,
The steps for generating the above inverse tree are:
A step of generating the reverse system tree by setting the low-voltage distributed power source as a branch of the fault point, when there is a low-voltage distributed power source linked to the fault point;
Including,
A method for analyzing a power network including distributed power sources.
In paragraph 5,
The steps for generating the above inverse tree are:
When the distributed power source is connected to the load side of the fault point, a step of creating the reverse system tree by setting the distributed power source as a branch of the fault point; and
A step of creating the reverse system tree by setting the trunk connection point of the fault point as a trunk of the reverse system tree and setting the trunk connection point of the distributed power source as a branch, when the trunk connection point of the distributed power source is on the load side of the trunk connection point of the fault point;
Including,
A method for analyzing a power network including distributed power sources.
In paragraph 5,
The steps for generating the above inverse tree are:
When a distributed power source is connected to the power side of the above fault point, a step of creating the reverse system tree by inserting the distributed power source into the upper node of the node registered as the power side of the distributed power source;
Including,
A method for analyzing a power network including distributed power sources.
In paragraph 4,
The step of generating power analysis information through analysis of the above system tree is:
A step of generating relative coordinate information based on the above-mentioned genealogy tree;
A step of generating absolute coordinate information based on the relative coordinate information;
A step of generating a single-line diagram based on the above absolute coordinate information; and
A step of generating power analysis information through analysis of the above single-line diagram;
Including,
A method for analyzing a power network including distributed power sources.
In Article 9,
The above single line diagram is,
It includes a linear diagram generated corresponding to the above linear tree and a reverse linear diagram generated corresponding to the above linear tree.
The above power analysis information is,
Contains at least one of the following information: information on power outages, information on power supply plans, information on protection cooperation, information on facility plans, and information on section load management.
A method for analyzing a power network including distributed power sources.
Memory that stores one or more instructions; and
A processor for executing one or more instructions stored in said memory;
Including,
The above processor executes one or more of the above instructions,
A computing device performing the method of claim 1.
A computer program stored on a computer-readable recording medium, which is combined with a computer as hardware and enables the method of claim 1 to be performed.