A catenary fault location method and device, a storage medium and an electronic device

Abstract

The application provides a catenary fault ranging method and device, a storage medium and an electronic device, and belongs to the field of power grid fault detection. The method comprises the following steps: dividing a to-be-detected line into m equal parts to obtain m intervals; calculating actual times of arrival of a traveling wave generated at a fault from an i-th interval to a first traveling wave fault ranging device and a second traveling wave fault ranging device; calculating a time difference value according to the first fault time, the second fault time and the actual times, wherein the time difference value has a linear relationship with each interval; determining a minimum value of the time difference value according to the linear relationship, and determining an interval corresponding to the minimum value as a fault interval. The device comprises a line equalization module, an actual time calculation module, a fault time calculation module, a time difference value calculation module and a fault interval calculation module. The application can realize accurate positioning, reduce forced outage time of a power transmission line, reduce losses and improve economic benefits.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of power grid fault detection, and particularly relates to a catenary fault ranging method and device, a storage medium and an electronic device. BACKGROUND

[0002] The catenary line is an important component of the traction power supply system, and most of the operating environments are in the wild, which are easily affected by natural disasters and thunderstorm weather, thereby causing line fault tripping. With the increase of the mileage of electrified railway lines in recent years, not only has the length of the catenary power supply line been improved, but also the line structure has become more and more complex, changing from the traditional single overhead type to the multi-T connection form. At present, the method for accurately positioning the catenary line fault usually adopts the impedance method, which converts the impedance of the fault point distance from the substation at the time of fault to the unit impedance, and then calculates the fault point.

[0003] However, the traditional impedance method for fault ranging has been unable to meet the accurate positioning of the catenary line fault with a complex structure at the present stage. SUMMARY

[0004] Based on the above technical problems, the application provides a catenary fault ranging method, device, storage medium and electronic device.

[0005] In a first aspect, the application provides a catenary fault ranging method, comprising:

[0006] Step S1: dividing a to-be-measured line into m intervals to obtain m intervals, a first traveling wave fault ranging device is installed at the outlet of the head-end substation of the to-be-measured line, and a second traveling wave fault ranging device is installed at the outlet of the tail-end substation of the to-be-measured line;

[0007] Step S2: when the i-th interval in the to-be-measured line fails, the actual time of the traveling wave generated at the time of fault from the i-th interval to the first traveling wave fault ranging device and the second traveling wave fault ranging device is calculated;

[0008] Step S3: performing wavelet transform on the traveling wave generated at the time of fault obtained by the first traveling wave fault ranging device to obtain a first fault time, and performing wavelet transform on the traveling wave generated at the time of fault obtained by the second traveling wave fault ranging device to obtain a second fault time;

[0009] Step S4: calculating a time difference value according to the first fault time, the second fault time and the actual time, the time difference value having a linear relationship with each interval;

[0010] Step S5: determining the minimum value of the time difference value according to the linear relationship, and determining the interval corresponding to the minimum value as the fault interval.

[0011] After determining the minimum value of the time difference value according to the linear relationship, determining the interval corresponding to the minimum value as a fault interval, the method further comprises:

[0012] determining whether the length of the fault interval is greater than a set threshold value;

[0013] in the case where the length of the fault interval is greater than the set threshold value, taking the fault interval as a new to-be-tested line, and performing steps S1-S5 to perform iteration;

[0014] in the case where the length of the fault interval is less than or equal to the set threshold value, stopping iteration, taking the currently determined fault interval as a final fault interval, and calculating the distance between the final fault interval and the outlet of the head-end substation.

[0015] the actual time at which the traveling wave generated at the fault reaches the first traveling wave fault location device and the second traveling wave fault location device from the ith interval, and the calculation formula is as follows:

[0016]

[0017]

[0018] wherein, L is the total length of the to-be-tested line, v is the traveling wave speed, t1 is the actual time at which the traveling wave generated at the fault reaches the first traveling wave fault location device from the ith interval, and t2 is the actual time at which the traveling wave generated at the fault reaches the second traveling wave fault location device from the ith interval.

[0019] the time difference value, and the calculation formula is as follows:

[0020]

[0021] wherein, T is the time difference value, t r1 is the first fault time, and t r2 is the second fault time.

[0022] the distance between the fault interval and the outlet of the head-end substation, and the calculation formula is as follows:

[0023]

[0024] wherein, L k is the distance between the fault interval and the outlet of the head-end substation after the kth iteration, j k is the jth interval obtained after equally dividing the fault interval for the kth time. k

[0025] ​In a second aspect, the application provides a catenary fault location device, comprising: a line equalization module, an actual time calculation module, a fault time calculation module, a time difference value calculation module, and a fault interval calculation module.

[0026] The line equalization module is configured to equally divide a to-be-tested line into m intervals, and a first traveling wave fault location device is installed at an outlet of a head-end substation of the to-be-tested line, and a second traveling wave fault location device is installed at an outlet of a tail-end substation of the to-be-tested line.

[0027] The actual time calculation module is configured to calculate actual times of arrival of a traveling wave generated at a fault time at an i-th interval in the to-be-tested line at the first traveling wave fault location device and the second traveling wave fault location device, respectively.

[0028] The fault time calculation module is configured to perform wavelet transform on the traveling wave generated at the fault time and acquired by the first traveling wave fault location device to obtain a first fault time, and perform wavelet transform on the traveling wave generated at the fault time and acquired by the second traveling wave fault location device to obtain a second fault time.

[0029] The time difference value calculation module is configured to calculate a time difference value according to the first fault time, the second fault time, and the actual times, and the time difference value has a linear relationship with each interval.

[0030] The fault interval calculation module is configured to determine a minimum value of the time difference value according to the linear relationship, and determine an interval corresponding to the minimum value as a fault interval.

[0031] The device further comprises an iteration module connected to the line equalization module and the fault interval calculation module, configured to determine whether a length of the fault interval is greater than a set threshold value, return to the line equalization module to perform iteration in a case where the length of the fault interval is greater than the set threshold value, and stop iteration in a case where the length of the fault interval is less than or equal to the set threshold value, and calculate a distance between the final fault interval and the outlet of the head-end substation.

[0032] The actual time calculation module comprises the following calculation formula:

[0033]

[0034]

[0035] Wherein, L is the total length of the line to be measured, v is the wave speed, t1 is the actual time of the traveling wave generated at the fault from the ith section to the first traveling wave fault location device, and t2 is the actual time of the traveling wave generated at the fault from the ith section to the second traveling wave fault location device.

[0036] In a third aspect, the present application provides an electronic device, comprising: one or more processors, and a memory, the memory storing instructions which, when executed by the one or more processors, cause the one or more processors to perform the catenary fault location method.

[0037] In a fourth aspect, the present application provides a computer-readable storage medium storing executable instructions which, when executed, cause a machine to perform the catenary fault location method.

[0038] Advantages:

[0039] The present application provides a catenary fault location method, device, storage medium and electronic device, which accurately locates the fault point based on weak discharge traveling wave signals, and accurately calculates the fault point by multiple iterations, and only needs to determine the initial span information of the line to be measured and the installation point information of the monitoring terminal to achieve the method. The method of the present application is simple in design, and the overall calculation amount of the system is small. When the values of m and j are large enough, the fault point positioning accuracy can be realized in meters. Compared with the traditional traveling wave fault positioning method, the present application has higher positioning efficiency, and can guide the on-site operation and maintenance to perform fault patrol and guide the reclosing action, reduce the forced outage time of the transmission line, thereby reducing the loss and improving the economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 A catenary fault location method flowchart of an embodiment of the present application;

[0041] Figure 2 A transmission line equivalent diagram of an embodiment of the present application;

[0042] Figure 3 A relationship diagram between the time difference value T and the section i of an embodiment of the present application;

[0043] Figure 4 A catenary fault location device principle block diagram of an embodiment of the present application. DETAILED DESCRIPTION

[0044] The present application will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0045] The overhead line is an important part of the traction power supply system. Most of the overhead line is in the wild, and is easily affected by natural disasters and thunderstorms, which leads to line fault tripping. With the increase of the mileage of electrified railways in recent years, the length of the overhead line has been improved, and the structure of the overhead line has become more complex, changing from the traditional single overhead type to the multi-T connection type. The traditional impedance method for fault location cannot meet the precise positioning of the overhead line fault with the complex structure. The impedance method uses the impedance of the fault point from the substation to measure the fault distance. The impedance of the fault point from the substation is converted into the unit impedance to obtain the fault point, and then the precise positioning of the fault point is obtained.

[0046] The present application uses the traveling wave current generated by the fault point at the time of fault to extract fault point information. The line with installed fault monitoring devices is equally divided. The actual wave head time difference and the theoretically calculated fault time difference are calculated to precisely locate the fault point. The difference is used to perform multiple iterations to obtain the final fault point position.

[0047] Embodiment one:

[0048] The present embodiment proposes an overhead line fault location method, as shown in Figure 1 , comprising:

[0049] Step S1: divide the to-be-measured line into m intervals, and install a first traveling wave fault location device at the outlet of the head-end substation of the to-be-measured line and a second traveling wave fault location device at the outlet of the tail-end substation of the to-be-measured line;

[0050] Let the distance between the first traveling wave fault location device and the second traveling wave fault location device be L, and divide the distance between the first traveling wave fault location device and the second traveling wave fault location device into m equal parts, then the distance between each equal part is l:

[0051]

[0052] In order to ensure that the entire to-be-measured line can be precisely positioned, the installation point of the traveling wave fault location device needs to be at the outlet of the substation.

[0053] Step S2: when the i-th interval in the to-be-measured line fails, calculate the actual time of the traveling wave generated at the time of fault from the i-th interval to the first traveling wave fault location device and the second traveling wave fault location device, respectively;

[0054] As shown in Figure 2As shown, f point in the equivalent diagram of transmission line is the grounding point of the overhead line fault, A is the monitoring device of the first traveling wave fault location device, B is the second traveling wave fault location device, A and B are respectively the traveling wave fault location device closest to the fault point, substation 1 is the reference substation, and substation 2 is the remote substation;

[0055] Suppose that the fault occurs at f point, and the fault occurs in the ith interval, where i and m are positive integers, at this time, the distance L1 of f point from substation 1 is, and the distance L2 of f point from substation 2 is:

[0056]

[0057]

[0058] The actual time of the traveling wave generated at the fault from the ith interval to the first traveling wave fault location device and the second traveling wave fault location device is calculated as follows:

[0059]

[0060]

[0061] Wherein, L is the total length of the line to be measured, v is the traveling wave speed, t1 is the actual time of the traveling wave generated at the fault from the ith interval to the first traveling wave fault location device, and t2 is the actual time of the traveling wave generated at the fault from the ith interval to the second traveling wave fault location device.

[0062] Step S3: wavelet transform is performed on the traveling wave generated at the fault obtained by the first traveling wave fault location device to obtain the first fault time; wavelet transform is performed on the traveling wave generated at the fault obtained by the second traveling wave fault location device to obtain the second fault time;

[0063] The wavelet transform process is as follows: first, the traveling wave generated at the fault is differentiated to obtain the modulus extreme point, and then the modulus extreme point is differentiated once to obtain the singular point, and the point corresponding to the maximum amplitude of the singular point in the time domain is the fault time.

[0064] Step S4: according to the first fault time, the second fault time and the actual time, the time difference value is calculated, and the time difference value has a linear relationship with each interval;

[0065] The time difference value is calculated as follows:

[0066]

[0067] Wherein, T is the time difference value, t r1 is the first fault time, t r2For the second fault moment, t1 is not equal to t2; then the fault interval is located in the ith interval, that is, the fault point interval is as shown in Figure 3 The time difference value has a linear relationship with each interval as shown in Figure 3 .

[0068] Step S5: determining the minimum value of the time difference value according to the linear relationship, and determining the interval corresponding to the minimum value as the fault interval.

[0069] After determining the minimum value of the time difference value according to the linear relationship and determining the interval corresponding to the minimum value as the fault interval, the method further comprises:

[0070] judging whether the length of the fault interval is greater than a set threshold value;

[0071] In the case where the length of the fault interval is greater than the set threshold value, the method executes steps S1-S5 to perform iteration with the fault interval as a new to-be-measured line.

[0072] In the case where the length of the fault interval is less than or equal to the set threshold value, the method stops iteration, takes the currently determined fault interval as a final fault interval, and calculates the distance between the final fault interval and the outlet of the head-end substation.

[0073] The distance between the fault interval and the outlet of the head-end substation is calculated as follows:

[0074]

[0075] wherein, L k is the distance between the fault interval and the outlet of the head-end substation after the kth iteration, j k is the jth interval obtained by equally dividing the fault interval for the kth time. k

[0076] ​The embodiment provides a catenary fault ranging method, first, a to-be-measured line is equally divided into m sections to obtain m intervals, when the ith interval in the to-be-measured line is faulty, actual times of a traveling wave generated at the time of the fault from the ith interval to a first traveling wave fault ranging device and a second traveling wave fault ranging device are calculated; then, wavelet transformation is performed on the traveling wave generated at the time of the fault and obtained by the first traveling wave fault ranging device to obtain a first fault time; wavelet transformation is performed on the traveling wave generated at the time of the fault and obtained by the second traveling wave fault ranging device to obtain a second fault time; a time difference value is calculated according to the first fault time, the second fault time and the actual times, the time difference value has a linear relationship with each interval; finally, a minimum value of the time difference value is determined according to the linear relationship, and an interval corresponding to the minimum value is determined as a fault interval. The fault interval can also be taken as a new to-be-measured line for iteration, the catenary fault can be accurately positioned by the traveling wave method through multiple iteration calculations, the traditional impedance method fault accurate positioning can be reduced from the hundred-meter level to the meter level, and the time for searching and solving the catenary fault is shortened.

[0077] Embodiment two:

[0078] The embodiment provides a catenary fault ranging device, as shown in the accompanying drawings, comprising a line equal division module, an actual time calculation module, a fault time calculation module, a time difference value calculation module and a fault interval calculation module. Figure 4

[0079] The line equal division module is used for equally dividing a to-be-measured line into m sections to obtain m intervals, a first traveling wave fault ranging device is installed at an outlet of a head-end substation of the to-be-measured line, and a second traveling wave fault ranging device is installed at an outlet of a tail-end substation of the to-be-measured line.

[0080] The actual time calculation module is used for calculating actual times of a traveling wave generated at the time of a fault from an ith interval in the to-be-measured line to the first traveling wave fault ranging device and the second traveling wave fault ranging device when the ith interval is faulty.

[0081] The fault time calculation module is used for performing wavelet transformation on the traveling wave generated at the time of the fault and obtained by the first traveling wave fault ranging device to obtain a first fault time, and performing wavelet transformation on the traveling wave generated at the time of the fault and obtained by the second traveling wave fault ranging device to obtain a second fault time.

[0082] The time difference value calculation module is used for calculating a time difference value according to the first fault time, the second fault time and the actual times, and the time difference value has a linear relationship with each interval.

[0083] ​The fault interval calculation module is configured to determine a minimum value of the time difference value according to the linear relationship, and determine an interval corresponding to the minimum value as a fault interval.

[0084] The device further comprises an iteration module connected with the line equalization module and the fault interval calculation module respectively, configured to judge whether the length of the fault interval is greater than a set threshold value; in the case that the length of the fault interval is greater than the set threshold value, the fault interval is taken as a new line to be measured, and the line equalization module is returned to perform iteration; in the case that the length of the fault interval is less than or equal to the set threshold value, the iteration is stopped, the fault interval currently determined is taken as a final fault interval, and the distance between the final fault interval and the outlet of the first terminal substation is calculated.

[0085] The actual time calculation module comprises the following calculation formula:

[0086]

[0087]

[0088] Wherein, L is the total length of the line to be measured, v is the traveling wave speed, t1 is the actual time of the traveling wave generated at the time of the fault from the ith interval to the first traveling wave fault distance measuring device, and t2 is the actual time of the traveling wave generated at the time of the fault from the ith interval to the second traveling wave fault distance measuring device respectively.

[0089] The embodiment provides a catenary fault ranging device, adopts a line equal division module to equally divide a to-be-measured line into m parts, adopts an actual time calculation module to calculate actual times of a traveling wave generated at a fault from an i-th section to a first traveling wave fault ranging device and a second traveling wave fault ranging device, adopts a fault time calculation module to perform wavelet transform on the traveling wave generated at the fault and acquired by the first traveling wave fault ranging device to obtain a first fault time, performs wavelet transform on the traveling wave generated at the fault and acquired by the second traveling wave fault ranging device to obtain a second fault time, adopts a time difference value calculation module to calculate a time difference value according to the first fault time, the second fault time and the actual times, adopts a fault section calculation module to determine a minimum value of the time difference value according to the linear relationship, and determines a section corresponding to the minimum value as a fault section. Finally, an iteration module is adopted to take the fault section as a new to-be-measured line to perform repeated iteration until a requirement of accuracy is met. The embodiment is based on a weak discharge traveling wave signal to accurately locate a fault point, utilizes a multiple iteration mode to accurately calculate the fault point, has simple design and small calculation amount, and when the values of m and j are large enough, the fault point locating accuracy of the system can reach a meter level. Compared with a traditional traveling wave method, the fault locating efficiency is higher, the on-site operation and maintenance, fault line patrol and guidance of a reclosing action are assisted, the forced outage time of a power transmission line is reduced, economic benefits are improved, and the cost of system fault maintenance is reduced.

[0090] Embodiment three

[0091] The embodiment provides an electronic device, which comprises one or more processors and a memory, the memory stores instructions, when the instructions are executed by the one or more processors, the one or more processors execute the catenary fault ranging method.

[0092] The electronic device can be a mobile phone, a computer or a tablet computer, and the like, and comprises a memory and a processor, the memory stores a computer program, and the computer program is executed by the processor to implement the catenary fault ranging method as described in the embodiment. It can be understood that the electronic device can further comprise an input / output (I / O) interface and a communication component.

[0093] The processor is configured to execute all or part of the steps of the catenary fault ranging method as described in the above embodiment. The memory is configured to store various types of data, which can comprise instructions of any application program or method in the electronic device, and application program related data.

[0094] The processor can be an Application Specific Integrated Cricuit (ASIC), a Digital Signal Processor (DSP), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic elements, which are used to execute the overhead line fault location method described in the above embodiments.

[0095] Embodiment Four

[0096] The embodiment provides a computer readable storage medium storing executable instructions, which, when executed, cause a machine to execute the overhead line fault location method.

[0097] The functional units in the various embodiments of the present application can be integrated in one processing unit, or exist separately as individual units, or two or more units can be integrated in one unit. When the functions are realized in the form of software functional units and sold or used as independent products, the software functional units can be stored in a computer readable storage medium.

[0098] Based on such understanding, the technical solutions of the present application, essentially or in part, or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0099] The aforementioned storage medium includes a flash memory, a hard disk, a multimedia card, a card-type memory (for example, a Secure Digital Memory Card (SD) or a Memory Data Register (MDR) memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an Application (APP) application store, and various other media that can store program check codes, in which a computer program is stored, and the computer program is executed by a processor to implement the steps of the overhead line fault location method described above.

[0100] The various embodiments in the present application are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0101] The scope of the present application is not limited to the above-described embodiments. It is apparent that those skilled in the art can make various modifications and changes to the present application without departing from the scope and spirit of the present application. If these modifications and changes belong to the scope of the claims of the present application and equivalent technologies thereof, the intention of the present application also includes these modifications and changes.

Claims

1. A method for measuring fault distance of a contact network, characterized in that: include: Step S1: Divide the line to be tested into m equal sections to obtain m sections. A first traveling wave fault location device is installed at the exit of the substation at the head end of the line to be tested, and a second traveling wave fault location device is installed at the exit of the substation at the tail end of the line to be tested. Step S2: when a fault occurs in the i-th section of the line to be tested, calculating the actual time it takes for the traveling wave generated by the fault to reach the first traveling wave fault distance measuring device and the second traveling wave fault distance measuring device from the i-th section respectively; Step S3: performing a wavelet transform on the traveling wave generated at the time of the fault obtained by the first traveling wave fault ranging device to obtain a first fault moment; performing a wavelet transform on the traveling wave generated at the time of the fault obtained by the second traveling wave fault ranging device to obtain a second fault moment; Step S4: calculating a time difference according to the first fault moment, the second fault moment, and the actual time, wherein the time difference in each interval has a nonlinear relationship; Step S5: determining the minimum value of the time difference according to the nonlinear relationship, and determining the interval corresponding to the minimum value as the fault interval.

2. The method for measuring the fault location of a contact network according to claim 1, wherein: After determining the minimum value of the time difference according to the linear relationship and determining the interval corresponding to the minimum value as the fault interval, the method further includes: Determining whether the length of the fault interval is greater than a set threshold; When the length of the fault interval is greater than a set threshold, the fault interval is taken as a new line to be tested, and steps S1 to S5 are executed iteratively; When the length of the fault interval is less than or equal to the set threshold, the iteration is stopped, the currently determined fault interval is taken as the final fault interval, and the distance between the final fault interval and the exit of the head-end substation is calculated.

3. The method for measuring the distance between the contact network faults according to claim 1, wherein: The actual time for the traveling wave generated when calculating the fault to reach the first traveling wave fault distance measuring device and the second traveling wave fault distance measuring device from the i-th section is calculated as follows: Wherein, L is the total length of the line to be measured, v is the traveling wave velocity, t1 is the actual time for the traveling wave generated during the fault to reach the first traveling wave fault ranging device from the i-th section, and t2 is the actual time for the traveling wave generated during the fault to reach the second traveling wave fault ranging device from the i-th section.

4. The method for measuring the distance between the contact network faults according to claim 3, wherein: The time difference is calculated as follows: Where T is the time difference, t r1 is the first fault moment, t r2 The second fault moment.

5. The method for measuring the distance between the contact network faults according to claim 4, wherein: The distance between the fault section and the head-end substation exit is calculated as follows: in, is the distance between the fault section and the first substation exit after the kth iteration, j k is the jth value obtained by dividing the fault interval into equal parts for the kth time. k intervals.

6. A contact network fault distance measuring device, characterized in that: include: Line equal division module, actual time calculation module, fault moment calculation module, time difference calculation module, fault interval calculation module; The line dividing module is used to divide the line to be tested into m equal sections to obtain m sections. A first traveling wave fault distance measuring device is installed at the exit of the substation at the head end of the line to be tested, and a second traveling wave fault distance measuring device is installed at the exit of the substation at the tail end of the line to be tested. The actual time calculation module is used to calculate the actual time it takes for the traveling wave generated by the fault to reach the first traveling wave fault distance measuring device and the second traveling wave fault distance measuring device respectively from the i-th section when a fault occurs in the i-th section of the line to be tested; The fault time calculation module is used to perform wavelet transform on the traveling wave generated when the fault is obtained by the first traveling wave fault ranging device to obtain the first fault time; and perform wavelet transform on the traveling wave generated when the fault is obtained by the second traveling wave fault ranging device to obtain the second fault time; The time difference calculation module is used to calculate the time difference according to the first fault moment, the second fault moment and the actual time, and the time difference of each interval has a nonlinear relationship; The fault interval calculation module is used to determine the minimum value of the time difference according to the nonlinear relationship, and determine the interval corresponding to the minimum value as the fault interval.

7. The contact network fault distance measuring device according to claim 6, characterized in that: The device also includes: an iteration module, which is connected to the line bisection module and the fault interval calculation module respectively, and is used to determine whether the length of the fault interval is greater than a set threshold; if the length of the fault interval is greater than the set threshold, the fault interval is used as a new line to be tested and returned to the line bisection module for iteration; if the length of the fault interval is less than or equal to the set threshold, the iteration is stopped, the currently determined fault interval is used as the final fault interval, and the distance between the final fault interval and the exit of the head-end substation is calculated.

8. The contact network fault distance measuring device according to claim 7, characterized in that: The actual time calculation module includes the following calculation formula: Wherein, L is the total length of the line to be measured, v is the traveling wave velocity, t1 is the actual time for the traveling wave generated during the fault to reach the first traveling wave fault ranging device from the i-th section, and t2 is the actual time for the traveling wave generated during the fault to reach the second traveling wave fault ranging device from the i-th section.

9. An electronic device, characterized in that: include: One or more processors, and a memory, wherein the memory stores instructions, and when the instructions are executed by the one or more processors, the one or more processors execute the contact network fault location method described in any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that It stores executable instructions, which, when executed, enable the machine to execute the contact network fault location method described in any one of claims 1 to 5.

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