Power distribution fault location method, device, server and storage medium

Abstract

The present invention relates to the technical field of power distribution fault analysis, and in particular to a power distribution fault location method, device, server and storage medium. The method of the present invention analyzes the line layer by layer on the basis of system self-healing, first locates the busbar section where the fault occurs, then determines whether the fault occurs on the busbar according to the state of the feeder switch, and when it occurs on the busbar, locates the interval of the feeder connection point where the busbar fault occurs by passing the feeder current, and finally uses a formula to give the specific fault point location to achieve accurate positioning. The method of the present invention provides a solution for finding the fault point from complex logic and locating the fault point on the basis of system self-healing.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution fault analysis, and in particular to a power distribution fault locating method, device, server and storage medium. Background Art

[0002] In the existing technology, some old lines in remote areas are in urgent need of upgrading and transformation to meet the needs of the times. For example, if the line switch does not have an intelligent power distribution terminal server, when a line power outage is caused by a single fault, the only way is to lock the fault area through manual line inspection and manually restore power supply to non-fault areas. The fault troubleshooting efficiency is low and the user power supply reliability is low.

[0003] Intelligent transformation can significantly solve the current problem of low efficiency in manual troubleshooting of faulty areas, while automatically restoring power supply to non-faulty areas, achieving the effect of improving quality and efficiency and intelligent operation and maintenance.

[0004] The old equipment switches of the existing power distribution lines do not follow the standard design and cannot be transformed into intelligent ones by simply adding intelligent power distribution terminals. Moreover, they cannot form linkage with the newly installed equipment.

[0005] When carrying out technical transformation based on existing conditions, in addition to considering the issue of self-healing after a line fault occurs, we should also consider how to quickly locate the fault point when a fault occurs, so as to promptly discover and resolve the line fault.

[0006] Based on this, it is necessary to develop and design a power distribution fault location method. Summary of the invention

[0007] The embodiments of the present invention provide a method, device, server and storage medium for locating a power distribution fault, which are used to solve the problem in the prior art that it is difficult to locate a fault after the power distribution system is self-healed.

[0008] In a first aspect, an embodiment of the present invention provides a method for locating a power distribution fault, comprising:

[0009] Obtaining the positions of a plurality of segment switches and a plurality of ring network switches, wherein the segment switch is a switch connecting each segment of a bus, and the ring network switch is a switch connecting different busbars;

[0010] Determine a target bus section according to the positions of the plurality of section switches and the positions of the plurality of ring network switches, wherein the target bus section is a bus section connected to the fault line;

[0011] Acquire positions of switches of a plurality of target feeders, wherein the target feeders are feeders connected to the target bus section;

[0012] determining a fault line according to positions of switches of the plurality of target feeders;

[0013] The faulty line is detected to determine the fault location.

[0014] In a possible implementation, determining the target bus section according to the positions of the plurality of section switches and the positions of the plurality of ring network switches includes:

[0015] For each busbar section, perform the following steps:

[0016] If the positions of the switches at both ends of the bus section are in the open position, the bus section is determined as the target bus section.

[0017] In a possible implementation manner, determining the fault line according to the positions of the switches of the plurality of target feeders includes:

[0018] Determining whether the positions of the switches of the plurality of target feeders are all in the open position;

[0019] If the positions of the switches of the multiple target feeders are all in the open position, the target bus section is a fault line;

[0020] If at least one of the positions of the switches of the plurality of target feeders is not an open position, acquiring an open record for each target feeder whose switch is in an open position;

[0021] It is determined that the target feeder whose opening record is automatic opening is a fault line.

[0022] In a possible implementation manner, if the fault line is a target bus section, detecting the fault line to determine the fault location includes:

[0023] Acquire historical currents between the connection points of the target bus section and historical currents of the multiple target feeders, wherein the historical currents are currents at the time of a fault, and the connection points are connection points between the target feeders and the target bus section;

[0024] Determine two adjacent connection points of the fault location according to the historical current between the connection points of the target bus section and the historical current of the multiple target feeders; the two adjacent connection points are a first connection point and a second connection point;

[0025] Obtaining a target bus length, a bus resistivity, and a measured voltage drop, wherein the measured voltage drop is a voltage drop between the first connection point and the second connection point when a fault occurs, and the target bus length is a length of the bus between the first connection point and the second connection point;

[0026] The fault location is determined according to the target bus length, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus section, and the historical current of the multiple target feeders.

[0027] In a possible implementation manner, determining two adjacent connection points of the fault location according to the historical currents between the connection points of the target bus section and the historical currents of the plurality of target feeders includes:

[0028] Calculate the calculated current of the busbar section between every two adjacent connection points according to the historical currents of the plurality of target feeders;

[0029] Starting from the most downstream connection point of the bus segment, the first bus segment whose calculated current is different from the historical current is selected as the fault segment, and two adjacent connection points of the fault segment are determined as two adjacent connection points of the fault position.

[0030] In a possible implementation, 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 section, and the historical current of the plurality of target feeders includes:

[0031] The distance from the first connection point is determined according to the target bus length, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus section, the historical current of the plurality of target feeders, and a first formula, wherein the first formula is:

[0032]

[0033] Where U is the measured voltage drop of the fault section, L is the length of the busbar in the fault section, ρ is the busbar resistivity, k is the corresponding position of the first connection point among multiple connection points, N is the total number of connection points, I is the measured current of the busbar between two adjacent connection points at the fault location, and I i is the historical current of the feeder connected to the i-th connection point, and l is the distance from the first connection point;

[0034] The fault location is determined according to the location of the first connection point and the distance from the first connection point.

[0035] In a possible implementation manner, after detecting the faulty line and determining the fault location, the method further includes:

[0036] Get the position of the tie switch;

[0037] If the tie switch is in a closed state, the busbar section connected to the tie switch is used as a self-healing busbar;

[0038] The two busbar sections connected to the self-healing busbar are fault lines.

[0039] In a second aspect, an embodiment of the present invention provides a power distribution fault location device, comprising:

[0040] A first acquisition module is used to acquire the positions of a plurality of segment switches and a plurality of ring network switches, wherein the segment switch is a switch connecting each segment of a bus, and the ring network switch is a switch connecting different busbars;

[0041] A faulty bus section determination module, used to determine a target bus section according to the positions of the multiple section switches and the positions of the multiple ring network switches, wherein the target bus section is a bus section connected to the faulty line;

[0042] A second acquisition module is used to acquire positions of switches of a plurality of target feeders, wherein the target feeders are feeders connected to the target bus section;

[0043] a fault line determination module, configured to determine the fault line according to the positions of the switches of the plurality of target feeders; and

[0044] The fault location module is used to detect the fault line and determine the fault location.

[0045] In a third aspect, an embodiment of the present invention provides a server, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method described in the first aspect or any possible implementation of the first aspect are implemented.

[0046] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described in the first aspect or any possible implementation of the first aspect are implemented.

[0047] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0048] The embodiment of the present invention discloses a method for locating a power distribution fault. On the basis of system self-healing, the line is analyzed layer by layer. First, the busbar segment where the fault occurs is located. Then, according to the state of the feeder switch, it is determined whether the fault occurs on the busbar. When the fault occurs on the busbar, the interval of the feeder connection point where the busbar fault is located is located by passing the feeder current. Finally, the specific fault point position is given by a formula to achieve accurate positioning. The method of the present invention provides a solution for finding the fault point from complex logic and locating the fault point on the basis of system self-healing. The method has clear layers and the final positioning position is relatively accurate. It is suitable for locating faults in distribution lines with self-healing systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0050] Figure 1 is a flow chart of a power distribution fault location method provided by an embodiment of the present invention;

[0051] Figure 2 It is a ring network power supply topology diagram provided by an embodiment of the present invention;

[0052] Figure 3 is a fault location principle diagram provided by an embodiment of the present invention;

[0053] Figure 4 is a self-healing topology diagram provided by an embodiment of the present invention;

[0054] Figure 5 is a functional block diagram of a power distribution fault locating device provided in an embodiment of the present invention;

[0055] Figure 6 It is a functional block diagram of a server provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary details.

[0057] In order to make the purpose, technical solutions and advantages of the present invention more clear, a specific implementation method will be described below in conjunction with the accompanying drawings.

[0058] The following is a detailed description of an embodiment of the present invention. This example is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0059] Figure 1 A flow chart of a power distribution fault locating method provided in an embodiment of the present invention.

[0060] like Figure 1 As shown, it shows a flow chart of the implementation of the power distribution fault location method provided by an embodiment of the present invention, which is described in detail as follows:

[0061] In step 101, the positions of a plurality of segment switches and a plurality of ring network switches are obtained, wherein the segment switch is a switch connecting each segment of a bus, and the ring network switch is a switch connecting different busbars.

[0062] For example, Figure 2 As shown, the figure shows a ring network power supply topology diagram provided by an embodiment of the present invention. In the figure, a power supply 201 supplies power to each feeder through each bus segment. A plurality of segment switches 202 are provided on the bus segment, each of which controls a bus segment. The bus segment supplies power to a load 203 through a feeder. In the figure, two upper and lower busbars are provided, and the two busbars are connected through a ring network switch 204. Under normal working conditions, the ring network switch 204 is in an open state (the switches shown in the figure are filled in black for the closed state and unfilled for the open state).

[0063] Figure 2 Each busbar includes two busbar sections. Switches are provided at both ends of each busbar section. The function of the switch is to isolate or connect two adjacent busbar sections. Each busbar section is provided with three feeders.

[0064] The position of the section switch and the ring network switch reflects the state of the switch. The closed position indicates that the switch is in the closed state, and the open position indicates that the switch is in the open state.

[0065] In step 102, a target bus section is determined according to the positions of the plurality of section switches and the positions of the plurality of ring network switches, wherein the target bus section is a bus section connected to the fault line.

[0066] In some embodiments, step 102 includes: for each bus section, performing the following steps: if the positions of the switches at both ends of the bus section are in the open position, the bus section is determined as the target bus section.

[0067] For example, for a faulty line, the system will automatically switch on and off to reduce the scope of the fault in order to speed up the self-healing process. Generally speaking, the self-healing process is to isolate the faulty line and transfer power to the normal line.

[0068] Therefore, when searching for the faulty line in a general direction, the isolated busbar section should be found. In the embodiment of the present invention, the busbar section with the switches at both ends being open is found as the busbar section connected to the faulty line.

[0069] by Figure 2For example, the switches at both ends of the left bus section of the upper bus in the figure are in the open state, indicating that the bus section is isolated and the fault line occurs in the area powered by the bus section. The bus section on the right side of the upper bus has a ring network switch 204 on the right side, which is in the closed state, indicating that the bus section is powered by the lower bus, achieving self-healing.

[0070] In step 103, positions of switches of a plurality of target feeders are acquired, where the target feeders are feeders connected to the target bus section.

[0071] In step 104, a fault line is determined according to the positions of switches of the plurality of target feeders;

[0072] In some embodiments, step 104 includes: determining whether the positions of the switches of the multiple target feeders are all in the open position; if the positions of the switches of the multiple target feeders are all in the open position, the target bus section is a fault line; if at least one of the positions of the switches of the multiple target feeders is not in the open position, obtaining an opening record for each target feeder whose switch is in the open position; determining that the target feeder whose opening record is automatic opening is a fault line.

[0073] Exemplarily, after preliminarily determining the scope where the fault occurs, the line where the fault occurs should be further determined.

[0074] After a fault occurs, the lines affected by the fault will be affected by the fault and the switches will be opened. If the switches of the feeders connected to the bus section are all in the open state, it means that there is a fault in the bus, and the feeders isolate the bus by opening the switches. If only some of the switches of the feeders connected to the bus section are in the open state, for the feeder lines in the open state, if they are automatically opened, they can be identified as faulty lines.

[0075] by Figure 2 For example, the switch of the feeder line on the far left in the upper part of the figure is in the open state, and the switches at both ends of the corresponding bus section are also not in the open state. If the switch of the feeder line on the far left in the upper part is automatically opened, it means that the feeder line is a fault line.

[0076] In step 105, the faulty line is detected to determine the fault location.

[0077] In some implementations, if the fault line is a target bus section, step 105 includes:

[0078] Acquire historical currents between the connection points of the target bus section and historical currents of the multiple target feeders, wherein the historical currents are currents at the time of a fault, and the connection points are connection points between the target feeders and the target bus section;

[0079] Determine two adjacent connection points of the fault location according to the historical current between the connection points of the target bus section and the historical current of the multiple target feeders; the two adjacent connection points are a first connection point and a second connection point;

[0080] Obtaining a target bus length, a bus resistivity, and a measured voltage drop, wherein the measured voltage drop is a voltage drop between the first connection point and the second connection point when a fault occurs, and the target bus length is a length of the bus between the first connection point and the second connection point;

[0081] The fault location is determined according to the target bus length, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus section, and the historical current of the multiple target feeders.

[0082] In some embodiments, determining two adjacent connection points of the fault location based on the historical current between the connection points of the target bus segment and the historical currents of the multiple target feeders includes: calculating the calculated current of the bus segment between every two adjacent connection points based on the historical currents of the multiple target feeders; starting from the most downstream connection point of the bus segment, selecting the first bus segment whose calculated current is different from the historical current as the fault segment, and determining two adjacent connection points of the fault segment as the two adjacent connection points of the fault location, the most downstream connection point being the connection point farthest from the power source.

[0083] In some embodiments, 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 section, and the historical current of the plurality of target feeders includes:

[0084] The distance from the first connection point is determined according to the target bus length, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus section, the historical current of the plurality of target feeders, and a first formula, wherein the first formula is:

[0085]

[0086] Where U is the measured voltage drop of the fault section, L is the length of the busbar in the fault section, ρ is the busbar resistivity, k is the corresponding position of the first connection point among multiple connection points, N is the total number of connection points, I is the measured current of the busbar between two adjacent connection points at the fault location, and I i is the historical current of the feeder connected to the i-th connection point, and l is the distance from the first connection point;

[0087] The fault location is determined according to the location of the first connection point and the distance from the first connection point.

[0088] For example, Figure 3As shown, Figure 3 The figure shows the line state when a bus section fault occurs. Specifically, a ground fault occurs on the bus section between the kth and k+1th feeders. The current of this bus section is I. There are N feeders in the line. For any feeder i, its current is I i .

[0089] When initially locating the specific position of the bus, first locate the interval where the fault occurs. When the bus is grounded or the phases are open, the bus current is greater than the current of each feeder downstream of this section of the bus.

[0090] by Figure 3 For example, if a ground fault occurs on the busbar section between the kth and k+1th feeders, it is obvious that the current I of this busbar section is greater than the sum of the currents of the downstream feeders, which are I k ~I N For the busbar between the k-1th and kth feeders, there is also a problem of inconsistency between the busbar current and the sum of the currents of each downstream feeder, while for the busbar section between the kth and k+1th feeders, there is no current inconsistency.

[0091] Therefore, when locating the interval where the fault occurs, starting from the downstream, the bus section current of the interval and the current of each downstream feeder are analyzed one by one. The first bus section interval with inconsistent current is the bus section interval with fault.

[0092] After determining the interval of the feeder where the fault occurs, the specific location can be determined by measuring the voltage drop, bus length, and bus resistivity.

[0093] The measured voltage drop is the voltage drop between two feeder bays (the measured voltage difference between the first connection point and the second connection point). The specific formula is:

[0094]

[0095] Where U is the measured voltage drop of the fault section, L is the length of the busbar in the fault section, ρ is the busbar resistivity, k is the corresponding position of the first connection point among multiple connection points, N is the total number of connection points, I is the measured current of the busbar between two adjacent connection points at the fault location, and I i is the historical current of the feeder connected to the i-th connection point, and l is the distance from the first connection point.

[0096] 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 precise location of the fault occurrence point can be obtained.

[0097] In some embodiments, step 106 is further included, and step 106 includes: obtaining the position of the connecting switch; if the position of the connecting switch is in a closed state, using the bus section connected to the connecting switch as a self-healing bus; and the two bus sections connected to the self-healing bus are fault lines.

[0098] For example, in some application scenarios, the power supply line has two power supplies, and power can be transferred from other power supplies. One form of power transfer from other power supplies is that more than two fault points occur in the power supply line.

[0099] like Figure 4 As shown, a second power source is provided in the figure, and the second power source can supply power through the tie switch 205. When the tie switch 205 is closed, it means that the bus section connected to the tie switch is a normal bus section, and the bus section isolated from the bus section is the bus section where the fault line is located.

[0100] The implementation method of the power distribution fault location method of the present invention analyzes the line layer by layer on the basis of system self-healing, first locates the busbar section where the fault occurs, then determines whether the fault occurs on the busbar according to the state of the feeder switch, and when it occurs on the busbar, locates the interval of the feeder connection point where the busbar fault occurs by passing the feeder current, and finally uses the formula to give the specific fault point location to achieve accurate positioning. The method of the present invention provides a solution for finding the fault point from complex logic and locating the fault point on the basis of system self-healing.

[0101] It should be understood that the size of the serial numbers of the steps in the above implementation does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation method of the present invention.

[0102] The following is an implementation of the device of the present invention. For details not described in detail, reference may be made to the corresponding method implementation described above.

[0103] Figure 5 is a functional block diagram of a power distribution fault location device provided in an embodiment of the present invention, referring to Figure 5 The power distribution fault locating device 5 includes: a first acquisition module 501 , a faulty bus section determining module 502 , a second acquisition module 503 , a faulty line determining module 504 and a fault locating module 505 .

[0104] The first acquisition module 501 is used to acquire the positions of multiple segment switches and multiple ring network switches, wherein the segment switch is a switch connecting each segment of a bus, and the ring network switch is a switch connecting different busbars.

[0105] The faulty bus section determination module 502 is used to determine a target bus section according to the positions of the multiple section switches and the positions of the multiple ring network switches, wherein the target bus section is a bus section connected to the faulty line.

[0106] The second acquisition module 503 is used to acquire positions of switches of multiple target feeders, where the target feeders are feeders connected to the target bus section.

[0107] A fault line determination module 504 is used to determine the fault line according to the positions of the switches of the plurality of target feeders. And,

[0108] The fault location module 505 is used to detect the fault line and determine the fault location.

[0109] Figure 6 is a functional block diagram of a server provided by an embodiment of the present invention. Figure 6 As shown, the server 6 of this embodiment includes: a processor 600, a memory 601, and a computer program 602 stored in the memory 601 and executable on the processor 600. When the processor 600 executes the computer program 602, the steps in the above-mentioned distribution fault location method and the embodiment are implemented, for example Figure 1 Steps 101 to 105 are shown.

[0110] Exemplarily, the computer program 602 may be divided into one or more modules / units, and the one or more modules / units are stored in the memory 601 and executed by the processor 600 to implement the present invention.

[0111] The server 6 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The server 6 may include, but is not limited to, a processor 600 and a memory 601. Those skilled in the art will appreciate that Figure 6 It is only an example of server 6 and does not constitute a limitation on server 6. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the server may also include input and output devices, network access devices, buses, etc.

[0112] The processor 600 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0113] The memory 601 may be an internal storage unit of the server 6, such as a hard disk or memory of the server 6. The memory 601 may also be an external storage device of the server 6, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the server 6. Further, the memory 601 may also include both an internal storage unit of the server 6 and an external storage device. 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.

[0114] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the implementation method can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method implementation method, which will not be repeated here.

[0115] In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0116] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0117] In the embodiments provided by the present invention, it should be understood that the disclosed devices / servers and methods can be implemented in other ways. For example, the device / server implementation described above is only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0118] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0119] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0120] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned implementation method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, it can implement the steps of the above-mentioned various power distribution fault location methods and power distribution fault location device implementation methods. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practices, computer-readable media does not include electrical carrier signals and telecommunication signals.

[0121] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for locating a power distribution fault, characterized in that: include: Obtaining the positions of a plurality of segment switches and a plurality of ring network switches, wherein the segment switch is a switch connecting each segment of a bus, and the ring network switch is a switch connecting different busbars; Determine a target bus section according to the positions of the plurality of section switches and the positions of the plurality of ring network switches, wherein the target bus section is a bus section connected to the fault line; Acquire positions of switches of a plurality of target feeders, wherein the target feeders are feeders connected to the target bus section; determining a fault line according to positions of switches of the plurality of target feeders; Detecting the faulty line to determine the fault location; in, The step of determining the fault line according to the positions of the switches of the plurality of target feeders comprises: Determining whether the positions of the switches of the plurality of target feeders are all in the open position; If the positions of the switches of the multiple target feeders are all in the open position, the target bus section is a fault line; If at least one of the positions of the switches of the plurality of target feeders is not an open position, acquiring an open record for each target feeder whose switch is in an open position; Determine that the target feeder for which the opening record is automatic opening is a fault line; in, If the fault line is a target bus section, the fault line is detected to determine the fault location, including: Acquire historical currents between the connection points of the target bus section and historical currents of the multiple target feeders, wherein the historical currents are currents at the time of a fault, and the connection points are connection points between the target feeders and the target bus section; Determine two adjacent connection points of the fault location according to the historical current between the connection points of the target bus section and the historical current of the multiple target feeders; the two adjacent connection points are a first connection point and a second connection point; Obtaining a target bus length, a bus resistivity, and a measured voltage drop, wherein the measured voltage drop is a voltage drop between the first connection point and the second connection point when a fault occurs, and the target bus length is a length of the bus between the first connection point and the second connection point; Determine 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 section, and the historical current of the plurality of target feeders; in, The determining two adjacent connection points of the fault location according to the historical currents between the connection points of the target bus section and the historical currents of the plurality of target feeders comprises: Calculate the calculated current of the busbar section between every two adjacent connection points according to the historical currents of the plurality of target feeders; Starting from the most downstream connection point of the bus segment, selecting the first bus segment where the calculated current is different from the historical current as the fault segment, determining two adjacent connection points of the fault segment as two adjacent connection points of the fault position, and the most downstream connection point is the connection point farthest from the power source; in, The determining of 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 section, and the historical current of the plurality of target feeders comprises: The distance from the first connection point is determined according to the target bus length, the bus resistivity, the measured voltage drop, the historical current between the connection points of the target bus section, the historical current of the plurality of target feeders, and a first formula, wherein the first formula is: In the formula, is the measured voltage drop in the fault section, is the length of the fault section busbar, is the busbar resistivity, is the corresponding position of the first connection point among the multiple connection points, is the total number of connection points, is the measured current of the busbar between two adjacent connection points at the fault location, For the Historical current of the feeder connected to the connection point, is the distance from the first connection point; The fault location is determined according to the location of the first connection point and the distance from the first connection point.

2. The method for locating a power distribution fault according to claim 1, characterized in that: The step of determining the target bus section according to the positions of the plurality of section switches and the positions of the plurality of ring network switches comprises: For each busbar section, perform the following steps: If the positions of the switches at both ends of the bus section are in the open position, the bus section is determined as the target bus section.

3. The method for locating a power distribution fault according to any one of claims 1 to 2, characterized in that: After detecting the fault line and determining the fault location, the method includes: Get the position of the tie switch; If the tie switch is in a closed state, the busbar section connected to the tie switch is used as a self-healing busbar; The two busbar sections connected to the self-healing busbar are fault lines.

4. A power distribution fault location device, characterized in that: Used to implement the power distribution fault locating method according to claim 1, the power distribution fault locating device comprises: A first acquisition module is used to acquire the positions of a plurality of segment switches and a plurality of ring network switches, wherein the segment switch is a switch connecting each segment of a bus, and the ring network switch is a switch connecting different busbars; A faulty bus section determination module, used to determine a target bus section according to the positions of the multiple section switches and the positions of the multiple ring network switches, wherein the target bus section is a bus section connected to the faulty line; A second acquisition module is used to acquire positions of switches of a plurality of target feeders, wherein the target feeders are feeders connected to the target bus section; a fault line determination module, configured to determine the fault line according to the positions of the switches of the plurality of target feeders; and The fault location module is used to detect the fault line and determine the fault location.

5. A server comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 3 are implemented.

6. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

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