Fault distance measurement method, device, equipment, medium and system for single-side power supply line
By acquiring and analyzing the voltage and current data of the single-side power line and accurately locate the fault location, the problem of inaccurate short-circuit fault positioning in the single-side power line is solved, and high accuracy and efficient troubleshooting is achieved.
Patent Information
- Application Number
- CN202411812089.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-04-25
AI Technical Summary
The prior art is difficult to accurately locate short circuit faults in a single-sided power line, especially under the influence of transition resistance, resulting in inaccurate distance measurement.
By obtaining the voltage data and current data of the head and output ends of each phase line of a single-side power line, use these data to determine the phase line where the fault occurs, and calculate the distance between the fault location and the head end based on the voltage and current data, reducing the impact of transition resistance on distance measurement.
It realizes the positioning of short circuit faults with high accuracy in a single-side power line, which is suitable for metal short circuits and non-metal short circuits, reducing manpower and material resources and time consumption, and improving troubleshooting efficiency.
Smart Images
Figure CN119881520A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present invention relate to the technical field of electric power supply, and in particular to a fault distance measurement method, device, equipment, medium and system for a single-side power supply line. Background Art
[0002] In order to eliminate faults and restore power supply in time, accurately measuring the fault point is the premise and foundation. On the one hand, it can greatly reduce the consumption of manpower, material resources and time, especially in remote areas, sparsely populated areas or cross-river lines, where it is very inconvenient to troubleshoot once a fault occurs; on the other hand, it can allow staff to know the specific location of the fault at the first time, eliminate the fault in time, restore power supply as soon as possible, minimize the economic losses of the people and the inconvenience caused to the people's lives, and prevent accidents. Therefore, timely and accurate positioning of the fault point is crucial, whether for financial and material considerations or for safety and convenience. Summary of the invention
[0003] The purpose of the present invention is to provide at least a method, device, equipment, medium and system for fault distance measurement of a single-side power supply line, which can at least effectively reduce the influence of transition resistance on distance measurement and solve the technical problem of accurate positioning when a short circuit fault occurs in a single-side power supply power line. Fault location is performed using the voltage at the beginning and end of the power line, which is suitable for metallic short circuits and non-metallic short circuits and has high accuracy.
[0004] To solve the above technical problems, this application proposes five aspects.
[0005] In a first aspect, the present application provides a fault distance measurement method for a single-sided power supply line, comprising: obtaining voltage data at the head end and the output end of each phase line in the single-sided power supply line, as well as current data at the head end; determining the phase line where the fault occurs based on the voltage data and the current data of each phase line; determining the distance between the fault location and the head end based on the voltage data at both ends of the phase line where the fault occurs and the current data at the head end.
[0006] In some embodiments, determining the faulty phase line based on the voltage data and the current data of each phase line includes: obtaining a preset reference current and a reference voltage; and determining the faulty phase line based on the reference current, the reference voltage, and the voltage data and the current data of each phase line.
[0007] In some implementations, when there is only one phase line that fails, determining the distance between the fault location and the head end based on the voltage data at both ends of the faulty phase line and the current data at the head end includes: obtaining the total length of the single-side power supply line and the self-impedance of the line per kilometer; determining the distance between the fault location and the head end of the faulty phase line based on the current data, the voltage data, the total length and the self-impedance of the faulty phase line.
[0008] In some embodiments, the determination of the distance between the fault location and the head end of the phase line where the fault occurs according to the current data, the voltage data, the total length and the self-impedance of the phase line where the fault occurs is implemented by the following formula:
[0009]
[0010] in and is the mutual inductance voltage and current at the head end of the phase line where the fault occurs, is the mutual inductance voltage at the output end of the faulty phase line, D is the total length of the line, Z is the self-impedance per kilometer of the line, and y is the distance between the fault location and the head end of the faulty phase line.
[0011] In some embodiments, when there are two faulty phase lines, determining the distance between the fault location and the head end based on the voltage data at both ends of the faulty phase line and the current data at the head end includes: obtaining the total length of the single-side power supply line, the self-impedance of the line per kilometer, and the mutual impedance of the line per kilometer; determining the distance between the fault location and the head end of the faulty phase line based on the current data, the voltage data, the total length, the mutual impedance and the self-impedance of the two-phase lines where the fault occurs.
[0012] In some embodiments, the distance between the fault location and the head end of the phase line where the fault occurs is determined according to the current data, the voltage data, the total length, the mutual impedance and the self-impedance of the two-phase lines where the fault occurs by the following formula: In the formula, and is the mutual inductance voltage and current at the head end of the first phase line where a fault occurs, is the mutual inductance voltage at the output end of the first faulty phase line, and is the mutual inductance voltage and current at the head end of the second faulty phase line, is the mutual inductance voltage at the output end of the second faulty phase line, z is the self-impedance, z m is the mutual impedance, D is the total length, and y is the distance between the fault location and the head end of the first phase line where the fault occurs.
[0013] In the second aspect, the present application proposes a fault distance measuring device for a single-sided power supply line, comprising: a first acquisition module, used to obtain voltage data at the head end and output end of each phase line in the single-sided power supply line, and current data at the head end; a first determination module, used to determine the phase line where the fault occurs based on the voltage data and the current data of each phase line; a second determination module, used to determine the distance between the fault location and the head end based on the voltage data at both ends of the faulty phase line and the current data at the head end.
[0014] In a third aspect, the present application proposes a computer electronic production device, characterized in that it includes a memory, a processor, and a computer program stored in the memory, and the processor executes the computer program to implement the steps of any one of the methods described in the first aspect.
[0015] In a fourth aspect, the present application proposes a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of any one of the methods described in the first aspect are implemented.
[0016] In the fifth aspect, the present application proposes a fault distance measurement system for a single-sided power supply line, comprising: a first data collection module, a second data collection module, a voltage transformer, a current transformer and the electronic production equipment as described in the third aspect; the first data collection module is installed at the head end of the single-sided power supply line, and is communicatively connected to the electronic production equipment; the second data collection module is installed at the output end of the single-sided power supply line, and is communicatively connected to the electronic production equipment; the head end and output end of each phase line of the single-sided power supply line are both installed with the voltage transformer; the current transformer is installed at the head end of each phase of the single-sided power supply line; the voltage transformer and current transformer installed at the head end of each phase line are connected to the first data collection module; the voltage transformer installed at the output end of each phase line is connected to the second data collection module.
[0017] The present application can effectively reduce the influence of transition resistance on distance measurement, solve the technical problem of accurate positioning when a short circuit occurs in a single-side power supply power line, and use the voltage at the beginning and end of the power line to locate the fault, which is applicable to metallic short circuits and non-metallic short circuits and has high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] One or more embodiments are exemplarily described by the pictures in the corresponding drawings, and these exemplary descriptions do not constitute limitations on the embodiments.
[0019] Figure 1 A main flow chart of a single-side power line fault location method provided in an embodiment of the present application;
[0020] Figure 2 A schematic diagram of a single-side power supply line when only one phase line fails, provided in an embodiment of the present application;
[0021] Figure 3 A schematic diagram of a single-side power supply line when two phase lines fail, provided in an embodiment of the present application;
[0022] Figure 4 A main structural block diagram of a single-side power line fault device provided in an embodiment of the present application;
[0023] Figure 5 A schematic diagram of the structure of a single-side power line fault distance measurement system provided in an embodiment of the present application. DETAILED DESCRIPTION
[0024] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.
[0025] In order to eliminate faults and restore power supply in time, accurately measuring the fault point is the premise and foundation. On the one hand, it can greatly reduce the consumption of manpower, material resources and time, especially in remote areas, sparsely populated areas or cross-river lines, where it is very inconvenient to troubleshoot once a fault occurs; on the other hand, it can allow staff to know the specific location of the fault at the first time, eliminate the fault in time, restore power supply as soon as possible, minimize the economic losses of the people and the inconvenience caused to the people's lives, and prevent accidents. Therefore, timely and accurate positioning of the fault point is crucial, whether for financial and material considerations or for safety and convenience.
[0026] In order to solve the above technical problems, the present invention proposes a fault ranging method for a single-sided power supply line. The implementation details of the fault ranging method for a single-sided power supply line of this embodiment are specifically described below. The following content is only the implementation details provided for the convenience of understanding and is not necessary for implementing this solution.
[0027] Embodiment 1:
[0028] The present application provides a method for fault location of a single-side power supply line, and the method is applied to electronic production equipment, and the electronic production equipment can be a server, a mobile terminal, a computer, a cloud platform, etc. The functions implemented by the production equipment data processing provided in the embodiment of the present application can be implemented by calling program codes by the processor of the electronic production equipment, wherein the program codes can be stored in a computer storage medium. Figure 1 As shown, the fault location method of the single-side power supply line includes:
[0029] Step S1: obtaining voltage data at the head end and output end of each phase line in a single-side power supply line, as well as current data at the head end.
[0030] When the line is operating normally, the current and voltage on the line will fluctuate within the range of reference voltage and reference current. However, if a fault occurs, the voltage and current on the line will change, and the distance of the fault can be inferred by the changes in the current and voltage on the line.
[0031] Step S2: Determine the phase line where the fault occurs according to the voltage data and the current data of each phase line.
[0032] In some embodiments, step S2 of "determining the phase line where the fault occurs according to the voltage data and the current data of each phase line" includes:
[0033] Step S21: Obtaining a preset reference current and reference voltage.
[0034] Step S22: determining a phase line where a fault occurs according to the reference current, the reference voltage, and the voltage data and the current data of each phase line.
[0035] When the line is working normally, the current and voltage on the line will fluctuate within the range of the reference voltage and reference current. However, if a fault occurs, the voltage and current on the line will change. Therefore, the phase line where the fault occurs can be determined based on the current voltage data, current data, reference voltage and reference current.
[0036] Step S3: determining the distance between the fault location and the head end according to the voltage data at both ends of the faulty phase line and the current data at the head end.
[0037] The present application is mainly applicable to determining the fault location by metallic short circuit or high-resistance short circuit, and these faults may be metallic short circuit or high-resistance short circuit to ground GND on a single phase line, as well as metallic short circuit or high-resistance short circuit between two phase lines.
[0038] In some embodiments, when a single-phase line fault occurs, step S3 "determine the distance between the fault location and the head end according to the voltage data at both ends of the faulty phase line and the current data at the head end" includes:
[0039] Step S31: Obtain the total length of the single-side power supply line and the self-impedance per kilometer of the line.
[0040] Step S32: determining the distance between the fault location and the head end of the phase line where the fault occurs according to the current data, the voltage data, the total length and the self-impedance of the phase line where the fault occurs.
[0041] When there is only one phase line that has a fault, the distance between the fault location and the beginning of the phase line is determined by the following formula:
[0042]
[0043] in and is the mutual inductance voltage and current at the head end of the phase line where the fault occurs, is the mutual inductance voltage at the output end of the faulty phase line, D is the total length of the line, Z is the self-impedance per kilometer of the line, and y is the distance between the fault location and the head end of the faulty phase line.
[0044] Among them, Figure 2 As shown, it is assumed that the single-side power supply power line is composed of an A-phase line, a B-phase line, and a C-phase line. The output end of the A-phase power supply EA is connected to the start end of the A-phase line Start, and the neutral end is grounded GND; the output end of the B-phase power supply EB is connected to the start end of the B-phase line Start, and the neutral end is grounded GND; the output end of the C-phase power supply EC is connected to the start end of the C-phase line Start, and the neutral end is grounded GND; the A-phase line, the B-phase line, and the start end of the C-phase line Start are respectively provided with a voltage transformer YHA1, a voltage transformer YHB1, a voltage transformer YHC1 and a current transformer LHA1, a current transformer LHB1, and a current transformer LHC1, and the output end of each transformer is connected to the input end of the first data collection module to provide the voltage required for measurement. Voltage Voltage and current Current Current The A phase line, the B phase line, and the C phase line are respectively provided with voltage transformers YHA2, YHB2, and YHC2. The output end of each transformer is connected to the input end of the second data collection module to provide the voltage required for measurement. Voltage Voltage The self-impedance of the power line is z per km, and the mutual impedance is z per km. m , with a length of D.
[0045] When a metallic short circuit or high-resistance ground short circuit occurs between the A-phase line and the ground GND at a distance y from the start end Start of the A-phase line, the fault distance y is calculated using formula (1):
[0046]
[0047] When a metallic short circuit or a high-resistance ground short circuit occurs between the B-phase line and the ground GND at a distance y from the start end Start of the B-phase line, the fault distance y is calculated using formula (2):
[0048]
[0049] When a metallic short circuit or a high-resistance ground short circuit occurs between the C phase line and the ground GND at a distance y from the start end Start of the C phase line, the fault distance y is calculated using formula (3):
[0050]
[0051] When there are two faulty phase lines, step S3 "determine the distance between the fault location and the head end according to the voltage data at both ends of the faulty phase line and the current data at the head end" includes:
[0052] Step S33: Obtain the total length of the single-side power supply line, the self-impedance per kilometer of the line, and the mutual impedance per kilometer of the line.
[0053] Step S34: determining the distance between the fault location and the head end of the phase line where the fault occurs according to the current data, the voltage data, the total length, the mutual impedance and the self-impedance of the two-phase lines where the fault occurs.
[0054] When there are two faulty phase lines, the distance between the fault location and the beginning of the phase line is determined by the following formula:
[0055]
[0056] In the formula, and is the mutual inductance voltage and current at the head end of the first phase line where a fault occurs, is the mutual inductance voltage at the output end of the first faulty phase line, and is the mutual inductance voltage and current at the head end of the second faulty phase line, is the mutual inductance voltage at the output end of the second faulty phase line, z is the self-impedance, z mis the mutual impedance, D is the total length, and y is the distance between the fault location and the head end of the first phase line where the fault occurs.
[0057] like Figure 3 As shown in Figure 1, when a metallic short circuit or high-resistance short circuit occurs between phase A and phase B at a distance y from the start end Start of phase A, the fault distance y is calculated using formula (4):
[0058]
[0059] When a metallic short circuit or high-resistance short circuit occurs between the B-phase line and the C-phase line at a distance y from the start end of the B-phase line Start, the fault distance y is calculated using formula (5):
[0060]
[0061] When a metallic short circuit or high-resistance short circuit occurs between the C-phase line and the A-phase line at a distance y from the start end of the C-phase line Start, the fault distance y is calculated using formula (6):
[0062]
[0063] The distance calculation formulas (1)(2)(3)(4)(5)(6) take into account the influence of the voltage and current at the line head end and output end during short circuit, which can greatly improve the distance measurement accuracy when passing through a high-resistance short circuit.
[0064] The present application can effectively reduce the influence of transition resistance on distance measurement, solve the technical problem of accurate positioning when a short circuit occurs in a single-side power supply power line, and use the voltage at the beginning and end of the power line to locate the fault, which is applicable to metallic short circuits and non-metallic short circuits and has high accuracy.
[0065] Embodiment 2:
[0066] Based on the foregoing embodiments, the embodiments of the present application provide a fault distance measuring device for a single-sided power supply line. The modules included in the device and the units included in each module can be implemented by a processor in a computer device; of course, they can also be implemented by a specific logic circuit; in the implementation process, the processor can be a central processing unit (CPU, Central Processing Unit), a microprocessor (MPU, Microprocessor Unit), a digital signal processor (DSP, Digital Signal Processing) or a field programmable gate array (FPGA, Field Programmable Gate Array), etc.
[0067] like Figure 4As shown, a fault distance measuring device for a single-side power supply line includes: a first acquisition module 1, a first determination module 2 and a second determination module 3.
[0068] The first acquisition module 1 is used to obtain the voltage data of the head end and the output end of each phase line in the single-side power supply line, and the current data of the head end. The first determination module 2 is used to determine the phase line where the fault occurs based on the voltage data and the current data of the head end and the output end of each phase line. The second determination module 3 is used to determine the distance between the fault location and the head end based on the voltage data at both ends of the phase line where the fault occurs and the current data at the head end.
[0069] Each module in the above-mentioned single-side power line fault distance measuring device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor in the device in the form of hardware, or can be stored in the memory in the processing device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.
[0070] Embodiment 3:
[0071] In a third aspect, the present application provides a computer electronic production device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any one of the methods described in the first aspect.
[0072] Among them, the memory and the processor are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor.
[0073] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory can be used to store data used by the processor when performing operations.
[0074] Embodiment 4:
[0075] In a fourth aspect, the present application proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods described in the first aspect.
[0076] Embodiment 5:
[0077] Fifthly, Figure 5 As shown, the present application proposes a fault location system for a single-side power supply line, comprising: a first data collection module, a second data collection module, a voltage transformer, a current transformer and the electronic production equipment as described in the third aspect.
[0078] The first data collection module is installed at the head end of the single-sided power supply line and is connected to the electronic production equipment for communication; the second data collection module is installed at the output end of the single-sided power supply line and is connected to the electronic production equipment for communication; the head end and output end of each phase of the single-sided power supply line are installed with the voltage transformer; the current transformer is installed at the head end of each phase of the single-sided power supply line; the voltage transformer and current transformer installed at the head end of each phase line are connected to the first data collection module; the voltage transformer installed at the output end of each phase line is connected to the second data collection module. Figure 5 In the diagram, YH is used to represent the voltage transformer and LH is used to represent the current transformer.
[0079] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as: ROM), random access memory (Random Access Memory, referred to as: RAM), disk or optical disk and other media that can store program codes.
[0080] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.
Claims
1. A method for fault location of a single-side power supply line, characterized in that: include: Obtain voltage data at the head end and output end of each phase line in a single-side power supply line, as well as current data at the head end; Determine the phase line where the fault occurs according to the voltage data and the current data of each phase line; The distance between the fault location and the head end is determined according to the voltage data at both ends of the faulty phase line and the current data at the head end.
2. The method according to claim 1, characterized in that The determining of the phase line where the fault occurs according to the voltage data and the current data of each phase line comprises: Obtaining preset reference current and reference voltage; The phase line where the fault occurs is determined according to the reference current, the reference voltage, the voltage data and the current data of each phase line.
3. The method according to claim 2, characterized in that When there is only one phase line that has a fault, determining the distance between the fault location and the head end according to the voltage data at both ends of the phase line that has a fault and the current data at the head end includes: Obtain the total length of the single-side power line and the self-impedance of the line per kilometer; The distance between the fault location and the head end of the phase line where the fault occurs is determined according to the current data, the voltage data, the total length and the self-impedance of the phase line where the fault occurs.
4. The method according to claim 3, characterized in that The determination of the distance between the fault location and the head end of the phase line where the fault occurs according to the current data, the voltage data, the total length and the self-impedance of the phase line where the fault occurs is achieved by the following formula: in and is the mutual inductance voltage and current at the head end of the faulty phase line, is the mutual inductance voltage at the output end of the faulty phase line, D is the total length of the line, Z is the self-impedance per kilometer of the line, and y is the distance between the fault location and the head end of the faulty phase line.
5. The method according to claim 2, characterized in that: When there are two phase lines with a fault, determining the distance between the fault location and the head end according to the voltage data at both ends of the phase line with a fault and the current data at the head end includes: Obtain the total length of the single-side power line, the self-impedance per kilometer of the line, and the mutual impedance per kilometer of the line; The distance between the fault location and the head end of the phase line where the fault occurs is determined according to the current data, the voltage data, the total length, the mutual impedance and the self-impedance of the two-phase lines where the fault occurs.
6. The method according to claim 5, characterized in that The determination of the distance between the fault location and the head end of the phase line where the fault occurs according to the current data, the voltage data, the total length, the mutual impedance and the self-impedance of the two-phase lines where the fault occurs is achieved by the following formula: In the formula, and is the mutual inductance voltage and current at the head end of the first phase line where a fault occurs, is the mutual inductance voltage at the output end of the first faulty phase line, and is the mutual inductance voltage and current at the head end of the second faulty phase line, is the mutual inductance voltage at the output end of the second faulty phase line, z is the self-impedance, z m is the mutual impedance, D is the total length, and y is the distance between the fault location and the head end of the first phase line where the fault occurs.
7. A fault distance measuring device for a single-side power supply line, characterized in that: include: A first acquisition module is used to acquire voltage data at the head end and output end of each phase line in a single-side power supply line, as well as current data at the head end; A first determination module is used to determine a phase line where a fault occurs based on the voltage data and the current data of each phase line; The second determination module is used to determine the distance between the fault location and the head end according to the voltage data at both ends of the faulty phase line and the current data at the head end.
8. A computer electronic production equipment, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method according to any one of claims 1 to 6.
9. A computer-readable storage medium having a computer program stored thereon, 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 6 are implemented.
10. A fault distance measurement system for a single-side power supply line, characterized in that: include: A first data collection module, a second data collection module, a voltage transformer, a current transformer, and an electronic production device as claimed in claim 8; The first data collection module is installed at the head end of the single-side power supply line and is communicatively connected with the electronic production equipment; The second data collection module is installed at the output end of the single-side power supply line and is communicatively connected with the electronic production equipment; The voltage transformer is installed at the head end and output end of each phase line of the single-side power supply line; The current transformer is installed at the head end of each phase of the single-side power supply line; The voltage transformer and the current transformer installed at the head end of each phase line are connected to the first data collection module; The voltage transformer installed at the output end of each phase line is connected to the second data collection module.