KR102366386B1 - Apparatus and Method for Selective Delivery of Distributed Energy Resources Information from Multiple Slave Devices in Smart Grid Environment - Google Patents

Abstract

In order to selectively transmit only the subscription-requested management information to the real-time distributed power management server after the master device establishes a connection with multiple slave devices, the distributed power management information of the slave devices is polled for master/slave communication in real time It is collected and temporarily stored in a hash table, which is a data memory, and when the data value of an item requested to be subscribed by the distributed power management server is changed, the data of the item temporarily stored from the hash table is read and converted into a data packet that can communicate with the distributed power management server to an apparatus and method of a distributed power information management system for real-time transmission.

Description

Apparatus and Method for Selective Delivery of Distributed Energy Resources Information from Multiple Slave Devices in Smart Grid Environment

The present invention relates to a smart grid system, and in particular, in a distributed power information management system, after collecting distributed power management information from slave devices such as switch controllers and various sensors in real time, only the management information requested to be subscribed to is selectively real-time distributed power It relates to an apparatus and method for transmitting to a management server.

Globally, the demand for power generation is increasing due to the increase in power consumption. In order to meet the increasing electricity consumption, plans are underway to build the most economical nuclear power plant, but there are cases where the construction of the power plant is delayed or the plan is withdrawn due to protests from residents around the power plant construction site and the transmission line construction site. is occurring It is exposed to the risk of a large-scale blackout at the national or metropolitan level by failing to meet the surge in summer or winter heating and cooling power peaks due to delays in power plant construction. In order to solve such a problem, power generation using a renewable energy source such as solar power or wind power is being sought.

In addition, research is underway to use the emergency generator as a distributed power source. Public facilities, commercial facilities, apartment complexes and factories are equipped with emergency generators to provide auxiliary power in case of emergency. The operating time of the emergency generator is insufficient to respond to power peaks, but it can be used as a regular power source through conversion to a gas-mixed co-fired generator. In the power consumer domain, if each microgrid can reduce power consumption by using its own power source or collect surplus power from multiple emergency generators and integrate it into large-scale virtual power generation and return it to the main grid, it is possible to respond more actively to the national power shortage. possible. As described above, depending on the state of the main grid, in order for the emergency generator to be actively interlocked with the main grid or to operate independently, a switch such as ATS (Automatic Transfer Switch) must be used. ATS has a temporary power outage to transition to independent and linked operation. However, uninterruptible transfer is possible when using a closed transition transfer switch (CTTS) switch.

Therefore, for a smart grid system for an efficient and active power grid, it is necessary to effectively control the comprehensive power operation together with a utility grid that effectively collects and monitors management information for various distributed power sources and interworks with the distributed power sources. am.

Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to establish a connection with multiple slave devices (eg, switch controller, various sensors, etc.) in a master device (eg, distributed power data feeder) Then, in order to selectively transmit only the subscription-requested management information to the real-time distributed power management server, the distributed power management information of the slave devices is collected in real time by a polling method for master/slave communication, and temporarily stored in a hash table, which is a data memory, and distributed When the data value of the item requested by the power management server is changed, it reads the data of the item temporarily stored from the hash table, converts it into a data packet that can communicate with the distributed power management server, and transmits it in real time. Device of the distributed power information management system (eg, distributed power data feeder) and to provide a method.

For example, it collects state information of distributed power from the switch controller to control switches such as ATS or CTTS capable of uninterruptible transfer, and collects real-time data provided by various sensors installed around the distributed power, and distributes power management server When data is changed with respect to the preset data items requested by It is to provide a device (eg, a distributed power data feeder) and a method of a distributed power information management system that can provide

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

First, to summarize the features of the present invention, the distributed power information management device in a smart grid environment according to an aspect of the present invention for achieving the above object establishes a connection with a switch controller and one or more sensors related to distributed power, and Slave connection to manage; a subscription data setting unit for receiving, setting, and managing one or more subscription request items from a distributed power management server on a network in relation to the distributed power; a slave data collection unit for collecting distributed power operation related data from the switch controller or a slave device including the sensor; a hash table management unit for storing and managing the distributed power operation related data in a hash table of a storage means for each item; a slave data conversion unit that selectively refers to the hash table for the subscription request item, monitors whether data is changed or added, extracts data of a corresponding item with data change or addition, and converts the data into a predetermined format; and a subscription data transmission unit for transmitting the converted data to the distributed power management server.

The switch controller controls a switch coupled for interworking between the distributed power supply and the utility grid and independent operation of the distributed power supply, and the sensor senses environmental information around the distributed power supply.

The switch may include a closed transition transfer switch (CTTS) or an automatic transfer switch (ATS).

The sensor may include a sensor for sensing vibration, noise, or temperature.

The slave data collection unit may collect information on the operation state of the distributed power supply from the switch controller in a polling manner, and collect environmental information around the distributed power supply from the sensor in a polling manner.

In addition, a method for managing distributed power information in a smart grid environment according to another aspect of the present invention comprises the steps of: establishing and managing a connection with a switch controller and one or more sensors related to distributed power; receiving, setting, and managing one or more subscription request items from a distributed power management server on a network in relation to the distributed power; collecting distributed power operation related data from the switch controller or a slave device including the sensor; storing and managing the distributed power operation related data in a hash table of a storage means for each item; monitoring whether data is changed or added by selectively referring to the hash table with respect to the subscription request item, extracting data of the corresponding item with data change or addition, and converting data into a predetermined format; and transmitting the converted data to the distributed power management server.

And, in the system for information management of the distributed power supply by being connected to a switch supporting the interworking between the distributed power supply and the utility grid or the independent operation of the distributed power supply according to another aspect of the present invention, the operation of the switch is controlled and a switch controller configured to receive information on an operating state of the distributed power supply through the switch; one or more sensors for sensing surrounding environment information of the distributed power supply; a distributed power management server for requesting a subscription for one or more items requiring management of the distributed power; and collects information on the operating state of the distributed power supply received from the switch controller and ambient environment information of the distributed power supply received from the one or more sensors, and monitors whether or not to selectively change the data of the subscription-requested item and a distributed power data feeder for transmitting the changed data of the corresponding item to the distributed power management server, wherein the distributed power management server receives the changed data of the corresponding item and displays the operational state of the distributed power or its surrounding environment It is characterized in that the management is performed.

According to the apparatus and method of a distributed power information management system for selectively transmitting distributed power information collected through multiple slave devices in a smart grid environment according to the present invention, for controlling switches such as ATS or CTTS capable of uninterruptible transfer Collects the status information of distributed power from the switch controller, collects real-time data provided by various sensors installed around the distributed power, and temporarily stores the information collected by the master/slave communication method from these multiple slave devices in a hash table After saving, if the value of only the data item requested by the distributed power management server is changed, it is transmitted to the distributed power management server in real time. Through this method, the distributed power management server selectively transmits only the data values of the subscribed items in real time, thereby solving the difficulties of system scalability and real-time data management that may arise from large-scale real-time data collection and management from multiple slave devices. .

1 is a diagram for explaining a smart grid system including a distributed power information management system for selectively transmitting distributed power information of multiple slave devices according to an embodiment of the present invention.
2 is a block diagram of a distributed power data feeder of a distributed power information management system according to an embodiment of the present invention.
3 is a flowchart for explaining the operation of the distributed power data feeder of the distributed power information management system according to an embodiment of the present invention.
4 is a view for explaining an example of a method for implementing a distributed power information management system according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

1 is for explaining a smart grid system 800 including a distributed power information management system 10 for selectively transmitting distributed power information of multiple slave devices 300 and 400 according to an embodiment of the present invention It is a drawing.

Referring to FIG. 1 , a smart grid system 800 according to an embodiment of the present invention includes a switch 500 , a distributed energy resource (DER, Distributed Energy Resource) 600, a utility grid (or a micro energy grid (MEG, Micro Energy Grid)) 700 , and a distributed power information management system 10 . The distributed power information management system 10 includes a switch controller 300 , a plurality of sensors 400 , a distributed power data feeder 200 , and a distributed power management server 100 .

The distributed power source 600 corresponds to a power source using renewable energy such as solar power, wind power, or tidal power, and a self-generated power source such as an emergency generator, and the utility grid 700 combines communication technology to connect the power grid between the power supplier and the power consumer. By managing efficiently, power can be effectively supplied to power consumers by using the power of the power supplier or by using the distributed power source 600 interlocking through the switch 500 .

The switch 500 that supports transfer switching to supply power to power consumers by interworking between the distributed power supply 600 and the utility grid 700 or independent operation of the distributed power supply 600 is a closed CTTS (closed) that supports uninterruptible transfer It is preferably a transition transfer switch (closed type transfer switch), but in some cases, other transfer switches such as ATS (Automatic Transfer Switch, automatic transfer switch) may be used.

The switch controller 300 of the distributed power information management system 10 controls the operation of the switch 500 for interlocking or independent operation as above, and information about the operating state of the distributed power supply 600 through the switch 500 can receive In some cases, the switch controller 300 may further receive information on the operating state of the utility grid 700 through the switch 500 .

For the safety management and control of the distributed power supply 600 , various sensors 400 for sensing environmental information around the distributed power supply 600 such as vibration, noise, and temperature are installed around the distributed power supply 600 .

In such a smart grid environment, the distributed power data feeder 200, which is the master managing multiple slave devices such as various sensors 400 and the switch controller 300, operates the distributed power supply 600 from the switch controller 300. (In some cases, it is also possible to collect information on the operating state of the utility grid 700), and collects environmental information around the distributed power source 600 from various sensors 400, and the distributed power management server ( 100) selectively changes (including addition) the data of the requested item, and when the data of the corresponding item is changed, the data of the corresponding item can be transmitted to the real-time distributed power management server 100 .

The distributed power management server 100 may receive an item that needs to be managed in relation to the distributed power 600 from a user, an operator, etc., and one or more items (eg, the voltage of the distributed power, You can request subscriptions for items related to operating conditions such as current and environmental information such as vibration, noise, and temperature around them). The distributed power management server 100 receives and monitors the data of the subscription-requested item from the distributed power data feeder 200, thereby managing the operating state of the distributed power supply 600 or whether there is an abnormality in the surrounding environment. there is. In some cases, the distributed power management server 100 transmits a control request for the operation of the distributed power source 600 or the operation of various sensors 400 to the distributed power data feeder 200, and by the distributed power data feeder 200 A predetermined operation for the distributed power supply 600 or a predetermined operation for the various sensors 400 may be controlled.

In the present invention, as described above in the smart grid environment, the distributed power data feeder 200 is the distributed power management server 100 of the information about the distributed power 600 collected through the multiple slave devices 300 and 400 of the item requested to be subscribed. Data can be selectively transmitted in real time, so that it is possible to solve system scalability and difficulties in real-time data management that may arise from large-scale real-time data collection and management from multiple slave devices 300 and 400 .

That is, the distributed power data feeder 200 collects information about the distributed power supply 600 by a master/slave communication method such as polling from such multiple slave devices 300 and 400, and a hash table which is a data memory. It can be temporarily stored in the distributed power management server 100, but when the value is changed only for the data item requested to be subscribed, it is transmitted to the distributed power management server 100 in real time, but the distributed power management server 100 has multiple (N) Even when data is collected from the slave devices 300 and 400, the distributed power management server 100 selectively transmits only the data values of the subscribed items in real time through the Publish/Subscribe method, which is advantageous for 1:N communication, in real time. Scalability can be increased and real-time data transmission and reception management can be easily realized.

2 is a block diagram of the distributed power data feeder 200 of the distributed power information management system 10 according to an embodiment of the present invention. For the description of the operation of the distributed power data feeder 200, reference is made to the flowchart of FIG. 3 .

First, referring to FIG. 2 , the distributed power data feeder 200 of the distributed power information management system 10 according to an embodiment of the present invention includes a slave connection unit 201 , a slave data collection unit 202 , and a hash table. It includes a management unit 203 , a subscription data setting unit 204 , a slave data conversion unit 205 , and a subscription data transmission unit 206 .

The slave connection unit 201 establishes and manages connections with the switch controller 300 and various sensors 400 that are slave devices for a role as a master in the master/slave communication method, and the subscription data setting unit 204 is a distributed power supply ( 600), a subscription request for one or more items requiring data management may be received from the distributed power management server 100 on a network, such as the Internet, and the received subscription request item(s) may be set and managed (FIG. 3). see S11 of). A storage means such as a memory may be used for such setting and management.

The slave data collection unit 202 may collect operation related data of the distributed power supply 600 stored in a storage means such as a register of multiple slave devices such as the switch controller 300 and various sensors 400 in a polling manner (FIG. 3). see S12 of). That is, the slave data collection unit 202 can collect information about the operating state of the distributed power supply 600 from the switch controller 300 (in some cases, it is also possible to collect information about the operating state of the utility grid 700 ) ), it is possible to collect environmental information around the distributed power source 600 from various sensors 400, a polling method for collecting data when a predetermined condition is satisfied, for example, monitoring the corresponding data value to determine the value Data can be collected in a way that periodically collects data when it is in the range of , or a range of unwanted values.

The hash table management unit 203 stores the data related to the operation of the distributed power supply 600, such as the information on the operation state of the distributed power supply 600 collected as above, the environment information around the distributed power supply 600, and the like, in a storage means such as a memory in a hash table form. can be stored and managed as (refer to S13 of FIG. 3). For example, when receiving data, the hash table management unit 203 may calculate a hash key for each item, convert it into data of a certain length corresponding to the location of the hash key according to a predetermined function, and store and manage it. .

The slave data conversion unit 205 selectively refers to the hash table with respect to the subscription request item(s) set by the subscription data setting unit 204 as above and monitors whether the data of the corresponding item is changed or added (FIG. 3). S14), when there is a change or addition of data of the corresponding item, data is extracted (or read) from the hash table using the hash key of the corresponding item (refer to S15 of FIG. 3). After extracting the data of the corresponding item, the slave data conversion unit 205 may convert the data into a data format that the distributed power management server 100 can receive according to a transmission method, etc. (refer to S16 of FIG. 3 ).

When the changed data of the subscription request item is converted into a predetermined format as described above, the subscription data transmission unit 206 may transmit the corresponding data packet to the distributed power management server 100 in real time.

The distributed power management server 100 receives and monitors the data of the corresponding item with data change or addition from the distributed power data feeder 200 for the subscription request item(s) requested as above, thereby operating the distributed power supply 600 It is possible to manage whether there is an abnormality in the state or the surrounding environment. According to such monitoring, if necessary, the distributed power management server 100 transmits a control request for the operation of the distributed power supply 600 or the operation of various sensors 400 to the distributed power data feeder 200 to the distributed power data feeder. A predetermined operation for the distributed power supply 600 or a predetermined operation for the various sensors 400 may be controlled by 200 .

4 is a view for explaining an example of an implementation method of the distributed power information management system 10 according to an embodiment of the present invention. That is, the distributed power data feeder 200 and the distributed power management server 100 of the distributed power information management system 10 according to an embodiment of the present invention may be formed of hardware, software, or a combination thereof. For example, the distributed power data feeder 200 and the distributed power management server 100 may be implemented as a computing system 1000 as shown in FIG. 4 .

The computing system 1000 includes at least one processor 1100 , a memory 1300 , a user interface input device 1400 , a user interface output device 1500 , a storage 1600 connected through a bus 1200 , and a network An interface 1700 may be included. The processor 1100 may be a central processing unit (CPU) or a semiconductor device that processes instructions stored in the memory 1300 and/or the storage 1600 . The memory 1300 and the storage 1600 may include various types of volatile or nonvolatile storage media. For example, the memory 1300 may include a read only memory (ROM) 1310 and a random access memory (RAM) 1320 .

Accordingly, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be directly implemented in hardware, a software module executed by the processor 1100 , or a combination of the two. A software module resides in a storage medium (ie, memory 1300 and/or storage 1600 ) such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM. You may. An exemplary storage medium is coupled to the processor 1100 , the processor 1100 capable of reading information from, and writing information to, the storage medium. Alternatively, the storage medium may be integrated with the processor 1100 . The processor and storage medium may reside within an application specific integrated circuit (ASIC). The ASIC may reside within the user terminal. Alternatively, the processor and storage medium may reside as separate components within the user terminal.

As described above, in 200 for managing distributed power information according to the present invention for selectively transmitting distributed power related information of multiple slave devices 300 and 400 in a smart grid environment, ATS or uninterruptible switching is possible The state information of the distributed power supply 600 is collected from the switch controller 300 for controlling a switch such as CTTS, and real-time data provided by various sensors 400 installed around the distributed power supply 600 are collected, and this Information collected by the master/slave communication method from the same multiple slave devices 300 and 400 is temporarily stored in a hash table and then distributed in real time when the value is changed only for the data item requested by the distributed power management server 100 for subscription It is transmitted to the power management server 100, but after data collection by data polling from the slave devices 300 and 400, the distributed power management server 100 subscribes through the Publish/Subscribe method, which is advantageous for 1:N communication. By selectively transmitting only the data values of items in real time, it is possible to solve system scalability and difficulties in real-time data management that may arise from large-scale real-time data collection and management from multiple slave devices 300 and 400 .

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

switch controller (300)
Various sensors (400)
Distributed Power Data Feeder (200)
Distributed Power Management Server (100)
switch(500)
Distributed Power (600)
Utility Grid(700)
Slave connection (201)
Slave data collection unit 202
Hash table management unit (203)
Subscription data setting unit (204)
Slave data conversion unit (205)
Subscription data transmission unit (206)

Claims (10)

As a device for managing distributed power information in a smart grid environment,
A switch controller for controlling the operation of the distributed power supply and a slave connection unit for establishing a connection with one or more sensors;
a subscription data setting unit for setting one or more subscription request items related to the distributed power from a distributed power management server on a network;
a slave data collection unit for collecting operation related data of the distributed power supply from the switch controller or a slave device including the sensor;
a hash table management unit for storing operation-related data of the distributed power source for each item in a hash table of the storage means; and
and a slave data converter for extracting data of an item in which data is changed or added among the subscription request items by referring to the hash table, and converting the extracted data into a predetermined format. According to claim 1,
The switch controller is
A distributed power information management device for controlling a switch coupled for interworking between the distributed power supply and the utility grid and for independent operation of the distributed power supply. 3. The method of claim 2,
The switch includes a closed transition transfer switch (CTTS) or an automatic transfer switch (ATS), distributed power information management device. According to claim 1,
The slave data collection unit,
Distributed power information management device that collects operation status information of utility grid. According to claim 1,
Distributed power information management apparatus further comprising a subscription data transmission unit for transmitting the data converted into a predetermined format to the distributed power management server. According to claim 1,
The slave data collection unit,
Collecting information about the operating state of the distributed power supply from the switch controller in a polling method,
Distributed power information management device for collecting environmental information around the distributed power supply from the sensor in a polling method. A method for managing distributed power information in a smart grid environment, comprising:
establishing a connection with a switch controller controlling the operation of the distributed power supply and one or more sensors;
setting one or more subscription request items related to the distributed power from a distributed power management server on a network;
collecting operation related data of the distributed power supply from the switch controller or a slave device including the sensor;
storing operation-related data of the distributed power supply for each item in a hash table of a storage means; and
A method for managing distributed power information comprising extracting data of an item in which data is changed or added among the subscription request items by referring to the hash table, and converting the extracted data into a predetermined format. 8. The method of claim 7,
The switch controller is
Distributed power information management method for controlling a switch coupled for interworking between the distributed power supply and the utility grid and for independent operation of the distributed power supply. 8. The method of claim 7,
The step of collecting distributed power operation related data from a slave device including the switch controller or the sensor comprises:
collecting information on the operation state of the distributed power supply from the switch controller in a polling manner; and
Collecting environmental information around the distributed power supply from the sensor in a polling method, the distributed power information management method. A system for managing information on the distributed power supply by being connected to a switch that supports interworking between distributed power and the utility grid or independent operation of the distributed power supply,
a switch controller for controlling the operation of the switch and receiving information on the operation state of the distributed power supply through the switch;
One or more sensors are provided for sensing information about the surrounding environment of the distributed power supply;
a distributed power management server for requesting subscription to one or more items requiring management of the distributed power; and
For information management of the distributed power source, information on the operating state of the distributed power source received from the switch controller and ambient environment information of the distributed power source received from one or more sensors are collected, and subscription-requested data of the item A distributed power data feeder that selectively monitors whether or not there is a change and transmits the changed data of the corresponding item to the distributed power management server,
The distributed power management server receives the changed data of the corresponding item and manages the operating state of the distributed power or its surrounding environment, the distributed power information management system.

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