CN114527353B - Power distribution fault location method, device, server and storage medium - Google Patents
Power distribution fault location method, device, server and storage medium Download PDFInfo
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- CN114527353B CN114527353B CN202210153295.0A CN202210153295A CN114527353B CN 114527353 B CN114527353 B CN 114527353B CN 202210153295 A CN202210153295 A CN 202210153295A CN 114527353 B CN114527353 B CN 114527353B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention relates to the technical field of distribution fault analysis, in particular to a distribution fault positioning method, a device, a server and a storage medium, wherein the method analyzes lines layer by layer on the basis of system self-healing, firstly positions bus segments where faults occur, and then, determining whether a fault occurs on the bus according to the state of the feeder switch, and positioning the interval of feeder connection points where the bus fault is located by feeder current when the fault occurs on the bus, and finally giving out the specific fault point position by using a formula to realize accurate positioning. The method of the invention provides a solution for finding out the fault point from the complex logic and positioning the fault point on the basis of the self-healing of the system.
Description
Technical Field
The present invention relates to the field of power distribution fault analysis technologies, and in particular, to a power distribution fault positioning method, a device, a server, and a storage medium.
Background
In the prior art, some old lines in remote areas are urgently needed to be upgraded and improved so as to meet the requirement of time development. If the line switch does not have an intelligent power distribution terminal server, line power failure caused by single fault can be prevented, a fault area can be locked only through a manual line inspection mode, and power supply in a non-fault area can be recovered manually. The failure detection efficiency is low, and the user power supply reliability is low.
The intelligent transformation can obviously solve the problem of low efficiency of manually troubleshooting the fault region at present, and simultaneously automatically recover the power supply of the non-fault region, thereby achieving the effects of improving quality, enhancing efficiency and intelligent operation and maintenance.
Old equipment switches of the existing distribution lines do not follow standard designs, and intelligent transformation cannot be achieved by only adding and distributing intelligent distribution terminals. And cannot form linkage fit with newly-installed equipment.
The technical transformation performed on the existing conditions not only considers the problem that the self-healing can be realized after the line fails, but also considers how to quickly determine the position of the fault point when the fault occurs, and timely discover and solve the line fault.
Based on the above, a power distribution fault positioning method needs to be developed and designed.
Disclosure of Invention
The embodiment of the invention provides a power distribution fault positioning method, a device, a server and a storage medium, which are used for solving the problem that a power distribution system is difficult to position faults after self-healing in the prior art.
In a first aspect, an embodiment of the present invention provides a power distribution fault positioning method, including:
acquiring positions of a plurality of sectionalizing switches and positions of a plurality of ring network switches, wherein the sectionalizing switches are switches connected with each section of a bus, and the ring network switches are switches connected with different buses;
Determining a target bus segment according to the positions of the plurality of sectionalizing switches and the positions of the plurality of looped network switches, wherein the target bus segment is a bus segment connected with a fault line;
acquiring positions of switches of a plurality of target feeder lines, wherein the target feeder lines are feeder lines connected with the target bus section;
Determining a fault line according to the positions of the switches of the target feeder lines;
and detecting the fault line and determining the fault position.
In one possible implementation manner, the determining the target bus segment according to the positions of the plurality of segment switches and the positions of the plurality of ring network switches includes:
For each bus-section, the following steps are performed:
and if the positions of the two-end switches of the bus section are the opening positions, determining the bus section as a target bus section.
In one possible implementation manner, the determining a fault line according to the positions of the switches of the target feeders includes:
Determining whether the positions of the switches of the target feeder lines are all opening positions;
if the positions of the switches of the target feeder lines are all the opening positions, the target bus section is a fault line;
If at least one of the positions of the switches of the plurality of target feeder lines is not a switching-off position, acquiring a switching-off record for the target feeder line of which each switch is at the switching-off position;
and determining the target feeder line which is recorded as automatic brake separation as a fault line.
In one possible implementation manner, if the faulty wire is the target bus segment, detecting the faulty wire, and determining the location of the fault includes:
Acquiring historical currents among all connection points of the target bus segment and historical currents of the plurality of target feeders, wherein the historical currents are currents in fault, and the connection points are connection points of the target feeder and the target bus segment;
determining two adjacent connection points of a fault position according to the historical currents among connection points of the target bus segments and the historical currents of the target feeders, wherein the two adjacent connection points are a first connection point and a second connection point;
Obtaining a target bus length, bus resistivity and measured voltage drop, wherein the measured voltage drop is the voltage drop between the first connection point and the second connection point when a fault occurs, and the target bus length is the length of a bus between the first connection point and the second connection point;
and determining the fault position according to the length of the target bus, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus segment and the historical current of the plurality of target feeders.
In one possible implementation manner, the determining two adjacent connection points of the fault location according to the historical currents between the connection points of the target bus segment and the historical currents of the target feeders includes:
calculating the calculated current of the bus section between every two adjacent connection points according to the historical currents of the target feeder lines;
And starting from the most downstream connection point of the bus sections, selecting the bus section with the first calculated current different from the historical current as a fault section, and determining two adjacent connection points of the fault section as two adjacent connection points of a fault position.
In one possible implementation, the determining the fault location according to the target bus length, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus segment, and the historical current of the plurality of target feeders includes:
Determining a distance from a first connection point according to a target bus length, a bus resistivity, an actually measured voltage drop, a historical current between connection points of a target bus segment, historical currents of the plurality of target feeder lines and a first formula, wherein the first formula is as follows:
Wherein U is the actual measured voltage drop of a fault section, L is the bus length of the fault section, ρ is the bus resistivity, k is the corresponding positions of a first connecting point at a plurality of connecting points, N is the total number of connecting points, I is the actual measured current of a bus between two adjacent connecting points at the fault position, I i is the historical current of a feeder line connected with an ith connecting point, and L is the distance from the first connecting point;
the fault location is determined based on the location of the first connection point and the distance from the first connection point.
In one possible implementation manner, after the fault line is detected and the fault position is determined, the method includes:
Acquiring the position of a contact switch;
if the position of the interconnection switch is in a closing state, taking a bus section connected with the interconnection switch as a self-healing bus;
And the two bus segments connected with the self-healing bus are fault lines.
In a second aspect, an embodiment of the present invention provides a power distribution fault locating device, including:
the first acquisition module is used for acquiring the positions of a plurality of sectionalizing switches and the positions of a plurality of ring network switches, wherein the sectionalizing switches are switches connected with all sections of buses, and the ring network switches are switches connected with different buses;
the fault bus segment determining module is used for determining a target bus segment according to the positions of the plurality of sectionalizing switches and the positions of the plurality of looped network switches, wherein the target bus segment is a bus segment connected with a fault line;
the second acquisition module is used for acquiring the positions of the switches of a plurality of target feeder lines, wherein the target feeder lines are feeder lines connected with the target bus section;
A fault line determination module for determining a fault line based on the positions of the switches of the plurality of target feeders, and
And the fault positioning module is used for detecting the fault line and determining the fault position.
In a third aspect, embodiments of the present invention provide a server comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method as described above in the first aspect or any one of the possible implementations of the first aspect when the computer program is executed.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above in the first aspect or any one of the possible implementations of the first aspect.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
The embodiment of the invention discloses a power distribution fault positioning method, which is characterized in that a line is analyzed layer by layer on the basis of self-healing of a system, a bus segment where a fault occurs is firstly positioned, then whether the fault occurs on a bus is determined according to the state of a feeder switch, when the fault occurs on the bus, the interval of a feeder connection point where the fault of the bus occurs is positioned through feeder current, and finally the specific fault point position is given out by utilizing a formula, so that accurate positioning is realized. The method of the invention provides a solution for finding the fault point from the complex logic and positioning the fault point on the basis of the self-healing of the system, has clear level and accurate final positioning position, and is suitable for positioning the fault of the distribution line with the self-healing system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a power distribution fault location method provided by an embodiment of the present invention;
fig. 2 is a diagram of a ring network power supply topology provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of fault localization provided by an embodiment of the present invention;
FIG. 4 is a self-healing topology provided by an embodiment of the present invention;
FIG. 5 is a functional block diagram of a power distribution fault locating device provided by an embodiment of the present invention;
Fig. 6 is a functional block diagram of a server provided by an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made with reference to the accompanying drawings.
The following describes in detail the embodiments of the present invention, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation procedure are given, but the protection scope of the present invention is not limited to the following embodiments.
Fig. 1 is a flowchart of a power distribution fault locating method according to an embodiment of the present invention.
As shown in fig. 1, a flowchart of an implementation of a power distribution fault positioning method according to an embodiment of the present invention is shown, and the details are as follows:
In step 101, the positions of a plurality of segment switches and the positions of a plurality of ring network switches are obtained, wherein the segment switches are switches for connecting each segment of a bus, and the ring network switches are switches for connecting different buses.
Illustratively, as shown in fig. 2, the ring network power supply topology diagram provided by the embodiment of the invention is shown, in the diagram, a power supply 201 supplies power to each feeder line through each bus segment, and a plurality of sectionalizing switches 202 are arranged on the bus segment to respectively control one section of bus segment. The bus-section is realized by a feeder for powering the load 203. In the figure, an upper bus and a lower bus are arranged, the two buses are connected through a ring network switch 204, and in a normal working state, the ring network switch 204 is in a brake-separating state (a switch shown in the figure, a black filled state is a brake-closing state, and an unfilled state is a brake-separating state).
Each bus in fig. 2 comprises two bus sections, two ends of each bus section are provided with switches, the switches are used for isolating or connecting two adjacent bus sections, and each bus section is provided with three feeder lines.
The positions of the sectionalized switch and the ring network switch reflect the state of the switch, the closing position indicates that the switch is in a closed state, and the opening position indicates that the switch is in an open state.
In step 102, a target bus-section is determined according to the positions of the plurality of segment switches and the positions of the plurality of ring network switches, wherein the target bus-section is a bus-section connected with the fault line.
In some embodiments, step 102 includes, for each bus-section, performing the step of determining the bus-section as a target bus-section if the position of the switch across the bus-section is a brake-off position.
For example, for a line that fails, since the system is able to speed up the self-healing process, switching of the switch is performed automatically to reduce the scope of the effect of the failure. In general, the self-healing process is to switch the normal line to power by isolating the faulty line.
Thus, looking for faulty wires from a large direction, isolated bus-sections should be found. In the embodiment of the invention, the bus section with the two-end switch being opened is found to serve as the bus section connected with the fault line.
Taking fig. 2 as an example, switches at two ends of a left bus section of an upper bus in the drawing are in a switching-off state, which indicates that the bus section is isolated, and a fault line occurs in a power supply area of the bus section. And the bus segment on the right side of the upper bus is provided with a ring network switch 204 on the right side, and is in a closed state, and the surface of the bus segment is powered by the lower bus, so that self-healing is realized.
In step 103, the positions of the switches of a plurality of target feeders are acquired, wherein the target feeders are feeders connected with the target bus-section.
In step 104, determining a faulty line according to the positions of the switches of the target feeders;
In some embodiments, step 104 includes determining whether the positions of the switches of the plurality of target feeders are all open positions, if all the positions of the switches of the plurality of target feeders are open positions, the target bus segment is a faulty line, if at least one of the positions of the switches of the plurality of target feeders is not open, acquiring an open record for the target feeder for which each switch is in an open position, and determining that the open record is an automatically open target feeder is a faulty line.
Illustratively, after the range of fault generation is initially determined, the line in which the fault is generated should be further determined.
After the fault occurs, the line affected by the fault is affected by the fault, and the switch is opened. If the switches of the feeder lines connected with the bus sections are all in a brake-separating state, the fault of the bus is indicated, and the feeder lines isolate the bus in a brake-separating mode. If the switch of the feeder line connected with the bus section is only in a split-gate state, the feeder line in the split-gate state can be identified as a fault line if the feeder line is automatically split-gate.
Taking fig. 2 as an example, the switch of the feeder line at the leftmost upper side in the drawing is in a switching-off state, and the switches at the two ends of the corresponding bus section are not in a switching-off state, and if the switch of the feeder line at the leftmost upper side is in an automatic switching-off state, the feeder line is indicated to be a fault line.
In step 105, the faulty wire is detected and the location of the fault is determined.
In some embodiments, if the faulty wire is the target bus-section, step 105 includes:
Acquiring historical currents among all connection points of the target bus segment and historical currents of the plurality of target feeders, wherein the historical currents are currents in fault, and the connection points are connection points of the target feeder and the target bus segment;
Determining two adjacent connection points of the fault position according to the historical currents among connection points of the target bus segments and the historical currents of the target feeder lines, wherein the two adjacent connection points are a first connection point and a second connection point;
Obtaining a target bus length, bus resistivity and measured voltage drop, wherein the measured voltage drop is the voltage drop between the first connection point and the second connection point when a fault occurs, and the target bus length is the length of a bus between the first connection point and the second connection point;
and determining the fault position according to the length of the target bus, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus segment and the historical current of the plurality of target feeders.
In some embodiments, the determining two adjacent connection points of the fault location according to the historical currents between the connection points of the target bus segments and the historical currents of the target feeders comprises calculating the calculated currents corresponding to the bus segments between every two adjacent connection points according to the historical currents of the target feeders, selecting a bus segment with the first calculated current different from the historical currents as a fault segment from the most downstream connection point of the bus segments, and determining the two adjacent connection points of the fault segment as the two adjacent connection points of the fault location, wherein the most downstream connection point is the connection point farthest from a power supply.
In some embodiments, the determining the fault location based on the target bus length, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus segment, and the historical current of the plurality of target feeders comprises:
Determining a distance from a first connection point according to a target bus length, a bus resistivity, an actually measured voltage drop, a historical current between connection points of a target bus segment, historical currents of the plurality of target feeder lines and a first formula, wherein the first formula is as follows:
Wherein U is the actual measured voltage drop of a fault section, L is the bus length of the fault section, ρ is the bus resistivity, k is the corresponding positions of a first connecting point at a plurality of connecting points, N is the total number of connecting points, I is the actual measured current of a bus between two adjacent connecting points at the fault position, I i is the historical current of a feeder line connected with an ith connecting point, and L is the distance from the first connecting point;
the fault location is determined based on the location of the first connection point and the distance from the first connection point.
Illustratively, as shown in fig. 3, fig. 3 shows a line state at the moment when a bus segment fails, specifically, a ground fault occurs on a bus segment between kth and k+1 feeder lines, the current of the bus segment is I, the line has N feeder lines in total, and for any feeder line I, the current is I i.
When the specific position of the bus is initially positioned, the interval of fault occurrence is positioned first, and when the bus is grounded or is in phase-to-phase disconnection, the current of the bus is larger than the current of each feeder line at the downstream of the bus.
Taking the example of fig. 3, if a ground fault occurs on a bus segment between the kth and k+1 feeder, it is apparent that the current I of the bus segment is greater than the sum of the currents of the downstream individual feeders, which are I k～IN. There is also the problem of non-uniformity of the sum of the busbar current and the current of the downstream individual feeders for the busbar between the kth-1 and kth feeder, while there is no current non-uniformity for the busbar segment between the kth and k+1 feeders.
Thus, in locating the occurring interval, from downstream, the bus-section current and the respective downstream feeder current sums of the intervals are analyzed one by one, the bus-section interval at which the first current is inconsistent being the bus-section interval at which the fault exists.
After determining the spacing of the feeders where the fault occurred, a specific location can be determined by measuring the voltage drop, bus length, and bus resistivity.
The measured voltage drop is the voltage drop between the two feeder spacings (the measured voltage difference between the first connection point and the second connection point). The specific formula is as follows:
Wherein U is the actual measured voltage drop of a fault section, L is the bus length of the fault section, ρ is the bus resistivity, k is the corresponding positions of the first connecting point at a plurality of connecting points, N is the total number of connecting points, I is the actual measured current of the bus between two adjacent connecting points at the fault position, I i is the historical current of a feeder line connected with the ith connecting point, and L is the distance from the first connecting point.
According to the above formula, the distance l from the first connection point is solved, and then, according to the position coordinates of the first point, the accurate position of the fault occurrence point can be obtained.
In some embodiments, the method further comprises step 106, wherein step 106 comprises the steps of obtaining the position of the tie switch, taking a bus segment connected with the tie switch as a self-healing bus if the position of the tie switch is in a closing state, and taking two bus segments connected with the self-healing bus as fault lines.
For example, in some application scenarios, the power supply line is two power supplies, and the other power supplies can be used for supplying power, and one form of supplying power from the other power supplies is that the power supply line has more than two fault points.
As shown in fig. 4, a second power source is provided, which can be turned on by the tie switch 205. When tie switch 205 is closed, the bus-section connected to the tie switch is illustrated as a normal bus-section, and the bus-section isolated from the bus-section is the bus-section where the faulty line is located.
The invention relates to an embodiment of a power distribution fault positioning method, which is characterized in that a line layer by layer is analyzed on the basis of self-healing of a system, a bus segment where a fault occurs is firstly positioned, then whether the fault occurs on a bus is determined according to the state of a feeder switch, when the fault occurs on the bus, the interval of a feeder connection point where the fault of the bus occurs is positioned through feeder current, and finally, the position of a specific fault point is given by utilizing a formula, so that accurate positioning is realized. The method of the invention provides a solution for finding out the fault point from the complex logic and positioning the fault point on the basis of the self-healing of the system.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 5 is a functional block diagram of a power distribution fault positioning device according to an embodiment of the present invention, and referring to fig. 5, the power distribution fault positioning device 5 includes a first acquisition module 501, a fault bus-section determining module 502, a second acquisition module 503, a fault line determining module 504, and a fault positioning module 505.
The first obtaining module 501 is configured to obtain positions of a plurality of segment switches and positions of a plurality of ring network switches, where the segment switches are switches connected to each segment of a bus, and the ring network switches are switches connected to different buses.
The fault bus-section determining module 502 is configured to determine a target bus-section according to the positions of the plurality of segment switches and the positions of the plurality of ring network switches, where the target bus-section is a bus-section connected with the fault line.
A second obtaining module 503, configured to obtain positions of switches of a plurality of target feeders, where the target feeders are feeders connected to the target bus-section.
A fault line determination module 504, configured to determine a fault line according to positions of switches of the target feeders. And
The fault location module 505 is configured to detect the fault line and determine a fault location.
Fig. 6 is a functional block diagram of a server provided by an embodiment of the present invention. As shown in fig. 6, the server 6 of this embodiment comprises a processor 600, a memory 601 and a computer program 602 stored in said memory 601 and executable on said processor 600. The processor 600, when executing the computer program 602, implements the steps of the respective power distribution fault locating methods and embodiments described above, such as steps 101 through 105 shown in fig. 1.
Illustratively, the computer program 602 may be partitioned into one or more modules/units that are stored in the memory 601 and executed by the processor 600 to accomplish the present invention.
The server 6 may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The server 6 may include, but is not limited to, a processor 600, a memory 601. It will be appreciated by those skilled in the art that fig. 6 is merely an example of server 6 and is not limiting of server 6, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., the server may also include input and output devices, network access devices, buses, etc.
The Processor 600 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 601 may be an internal storage unit of the server 6, such as a hard disk or a memory of the server 6. The memory 601 may be an external storage device of the server 6, such as a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD) or the like, which are provided on the server 6. Further, the memory 601 may also include both an internal storage unit and an external storage device of the server 6. The memory 601 is used to store the computer program and other programs and data required by the server. The memory 601 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, and will not be described herein again.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the details or descriptions of other embodiments may be referred to for those parts of an embodiment that are not described in detail or are described in detail.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans 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.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/server and method may be implemented in other manners. For example, the above-described apparatus/server implementations are merely illustrative, and the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the procedures in the methods of the above embodiments, or may be implemented by instructing the relevant hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of the respective power distribution fault location method and power distribution fault location device embodiments described above when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The foregoing embodiments are merely illustrative of the technical solutions of the present invention, and not restrictive, and although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that modifications may be made thereto or equivalents may be substituted for some of the technical features thereof, and those modifications or substitutions may be made without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A method of locating a power distribution fault, comprising:
acquiring positions of a plurality of sectionalizing switches and positions of a plurality of ring network switches, wherein the sectionalizing switches are switches connected with each section of a bus, and the ring network switches are switches connected with different buses;
Determining a target bus segment according to the positions of the plurality of sectionalizing switches and the positions of the plurality of looped network switches, wherein the target bus segment is a bus segment connected with a fault line;
acquiring positions of switches of a plurality of target feeder lines, wherein the target feeder lines are feeder lines connected with the target bus section;
Determining a fault line according to the positions of the switches of the target feeder lines;
detecting the fault line and determining a fault position;
wherein,
The determining a fault line according to the positions of the switches of the target feeder lines comprises:
Determining whether the positions of the switches of the target feeder lines are all opening positions;
if the positions of the switches of the target feeder lines are all the opening positions, the target bus section is a fault line;
If at least one of the positions of the switches of the plurality of target feeder lines is not a switching-off position, acquiring a switching-off record for the target feeder line of which each switch is at the switching-off position;
determining the target feeder line which is recorded as automatic brake separation as a fault line;
wherein,
If the fault line is a target bus segment, detecting the fault line, and determining a fault position, including:
Acquiring historical currents among all connection points of the target bus segment and historical currents of the plurality of target feeders, wherein the historical currents are currents in fault, and the connection points are connection points of the target feeder and the target bus segment;
determining two adjacent connection points of a fault position according to the historical currents among connection points of the target bus segments and the historical currents of the target feeders, wherein the two adjacent connection points are a first connection point and a second connection point;
Obtaining a target bus length, bus resistivity and measured voltage drop, wherein the measured voltage drop is the voltage drop between the first connection point and the second connection point when a fault occurs, and the target bus length is the length of a bus between the first connection point and the second connection point;
determining a fault position according to the length of the target bus, the bus resistivity, the measured voltage drop, the historical current between each connection point of the target bus segment and the historical current of the plurality of target feeders;
wherein,
The determining two adjacent connection points of the fault location according to the historical currents between the connection points of the target bus segment and the historical currents of the target feeders comprises:
calculating the calculated current of the bus section between every two adjacent connection points according to the historical currents of the target feeder lines;
Starting from the most downstream connection point of the bus sections, selecting a first bus section with the calculated current different from the historical current as a fault section, and determining that two adjacent connection points of the fault section are two adjacent connection points of a fault position, wherein the most downstream connection point is the connection point farthest from a power supply;
wherein,
Determining the fault location according to the target bus length, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus segment and the historical current of the plurality of target feeders, including:
Determining a distance from a first connection point according to a target bus length, a bus resistivity, an actually measured voltage drop, a historical current between connection points of a target bus segment, historical currents of the plurality of target feeder lines and a first formula, wherein the first formula is as follows:
In the formula, The voltage drop is measured for the fault section,For the length of the bus bar of the fault section,In order to achieve a specific electrical resistance of the bus bar,For the first connection point at the corresponding position of the plurality of connection points,For the total number of connection points,For the measured current of the bus bar between two adjacent connection points at the fault location,Is the firstThe historical current of the feeder to which the connection point is connected,Is the distance from the first connection point;
the fault location is determined based on the location of the first connection point and the distance from the first connection point.
2. The method of claim 1, wherein determining the target bus-section based on the positions of the plurality of segment switches and the positions of the plurality of ring network switches comprises:
For each bus-section, the following steps are performed:
and if the positions of the two-end switches of the bus section are the opening positions, determining the bus section as a target bus section.
3. The power distribution fault location method according to any one of claims 1-2, characterized in that after said detecting said faulty line, determining the fault location, it comprises:
Acquiring the position of a contact switch;
if the position of the interconnection switch is in a closing state, taking a bus section connected with the interconnection switch as a self-healing bus;
And the two bus segments connected with the self-healing bus are fault lines.
4. A power distribution fault locating device for implementing the power distribution fault locating method as claimed in claim 1, the power distribution fault locating device comprising:
the first acquisition module is used for acquiring the positions of a plurality of sectionalizing switches and the positions of a plurality of ring network switches, wherein the sectionalizing switches are switches connected with all sections of buses, and the ring network switches are switches connected with different buses;
the fault bus segment determining module is used for determining a target bus segment according to the positions of the plurality of sectionalizing switches and the positions of the plurality of looped network switches, wherein the target bus segment is a bus segment connected with a fault line;
the second acquisition module is used for acquiring the positions of the switches of a plurality of target feeder lines, wherein the target feeder lines are feeder lines connected with the target bus section;
A fault line determination module for determining a fault line based on the positions of the switches of the plurality of target feeders, and
And the fault positioning module is used for detecting the fault line and determining the fault position.
5. A server comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of the preceding claims 1 to 3 when the computer program is executed.
6. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any of the preceding claims 1 to 3.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801143A (en) * | 2012-09-04 | 2012-11-28 | 山西省电力公司大同供电分公司 | Device and method for automatically isolating automatic system line fault in power distribution network |
| CN113884816A (en) * | 2021-10-25 | 2022-01-04 | 北京东土科技股份有限公司 | Single-phase earth fault section positioning method, device, equipment and storage medium |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014240767A (en) * | 2013-06-11 | 2014-12-25 | シャープ株式会社 | Grounding detection device |
| CN103792465B (en) * | 2013-12-24 | 2016-05-04 | 中国矿业大学 | A kind of method of the range finding of the one-phase earthing failure in electric distribution network based on residual voltage |
| CN104135080A (en) * | 2014-08-11 | 2014-11-05 | 国家电网公司 | Intelligent longitudinal interconnection feeder automation control method |
| CN104849625A (en) * | 2015-06-11 | 2015-08-19 | 中国电力工程顾问集团华东电力设计院有限公司 | Fault point location method and power grid system of power grid system containing ring network |
| CN107462805A (en) * | 2017-10-09 | 2017-12-12 | 国网山东省电力公司临沂供电公司 | A kind of short circuit fault of power distribution network protection and localization method |
| US10908203B2 (en) * | 2019-04-09 | 2021-02-02 | Mitsubishi Electric Research Laboratories, Inc. | Simultaneous fault detection and location of power distribution systems |
| CN111751655B (en) * | 2020-05-29 | 2022-07-15 | 深圳供电局有限公司 | Fault self-healing method and device for distribution line, computer equipment and storage medium |
| CN112165090A (en) * | 2020-09-29 | 2021-01-01 | 国电南瑞南京控制系统有限公司 | Cooperative self-healing system and method |
| CN113484659B (en) * | 2021-05-26 | 2022-07-29 | 贵州电网有限责任公司 | 10kV distribution line single-phase line break fault direction detection method and device based on phase voltage change information |
| CN113466628A (en) * | 2021-07-09 | 2021-10-01 | 国网江苏省电力有限公司扬州供电分公司 | Small current ground fault distance measurement method for power distribution network resonance grounding system |
| CN113962459B (en) * | 2021-10-21 | 2025-01-03 | 福建永福电力设计股份有限公司 | Post-disaster power grid restoration time prediction method considering distribution network resilience |
-
2022
- 2022-02-18 CN CN202210153295.0A patent/CN114527353B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801143A (en) * | 2012-09-04 | 2012-11-28 | 山西省电力公司大同供电分公司 | Device and method for automatically isolating automatic system line fault in power distribution network |
| CN113884816A (en) * | 2021-10-25 | 2022-01-04 | 北京东土科技股份有限公司 | Single-phase earth fault section positioning method, device, equipment and storage medium |
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