Fault positioning method, device and equipment for power distribution network and storage medium

Abstract

The invention discloses a fault positioning method, device and equipment for a power distribution network and a storage medium, and the method comprises the steps: obtaining the line laying information and line switch information of the power distribution network, determining a line branch point and a line switch tail end, monitoring a first fault traveling wave at the line branch point, monitoring a second fault traveling wave at the line switch tail end, and calculating a monitoring time difference between the first fault traveling wave and the second fault traveling wave, and positioning a fault point in the power distribution network according to the first fault traveling wave speed, the second fault traveling wave speed and the monitoring time difference. Therefore, through carrying out traveling wave measurement at the line branch point and the tail end of the line switch and combining the time difference of two traveling waves and the traveling wave speed, the fault point can be accurately positioned even if the fault occurs in a topological change area, and compared with single-end traveling wave monitoring and double-end monitoring, the accuracy is higher, and the accuracy is higher. The slight fault is easier to find in the inspection window period, and the slight fault is prevented from being expanded.

Description

Technical Field

[0001] The present application relates to the technical field of power grid fault processing, and more specifically, to a method, apparatus, device, and storage medium for locating a fault in a distribution network. Background Art

[0002] In the context of intelligent distribution network development, the accuracy of fault location directly impacts power supply reliability and operation and maintenance efficiency. Traditional distribution network fault location methods rely on single-ended traveling wave monitoring or static topology models, which are difficult to adapt to complex branch structures and dynamic operation scenarios.

[0003] When a fault occurs in an area with topological changes, the traveling wave velocity calculation and path planning based on fixed parameters will deviate significantly from the actual situation, resulting in positioning failure. This makes it difficult to detect minor faults during the inspection window period of a complex distribution network, causing minor faults to be magnified.

[0004] How to accurately locate the fault points of the distribution network so that minor faults can be more easily discovered during the inspection window period and avoid the expansion of minor faults is an issue that needs attention. Summary of the Invention

[0005] In view of the above problems, the present application provides a fault location method, device, equipment and storage medium for a distribution network to improve the accuracy of fault location, make minor faults easier to detect during the inspection window period, and avoid the expansion of minor faults.

[0006] In order to achieve the above objectives, the following specific plans are proposed:

[0007] A method for locating a fault in a distribution network, comprising:

[0008] Acquire line laying information and line switch information of the distribution network, and determine a line branch point from the line laying information, and determine a line switch end from the line switch information;

[0009] monitoring a first fault traveling wave at the line branch point and a second fault traveling wave at the line switch end;

[0010] calculating a monitoring time difference between the first fault traveling wave and the second fault traveling wave;

[0011] The fault point in the distribution network is located according to the traveling wave speed of the first fault traveling wave, the traveling wave speed of the second fault traveling wave, and the monitoring time difference.

[0012] Optionally, a first fault recorder is provided at the line branch point, and a second fault recorder is provided at the end of the line switch;

[0013] The first fault traveling wave is obtained by monitoring the first fault recorder, and the second fault traveling wave is obtained by monitoring the second fault recorder.

[0014] Optionally, the method further includes:

[0015] Based on the line laying information and the line switch information, establishing a line laying digital twin model of the distribution network, wherein the line laying digital twin model includes line switches;

[0016] The information of the first fault traveling wave and the information of the second fault traveling wave are transmitted in real time to the line laying digital twin model, so that the line laying digital twin model adjusts the opening and closing of the line switch based on the information of the first fault traveling wave and the information of the second fault traveling wave.

[0017] Optionally, based on the line laying information and the line switch information, a line laying digital twin model of the distribution network is established, including:

[0018] Acquire a device information set of the distribution network, the device information set including device information of a plurality of devices in the distribution network, the device information of each device including the name, model, specifications, manufacturer information of the device, and location information of the device in the distribution network;

[0019] Generating a device topology ledger of the distribution network according to the device information set;

[0020] Based on the equipment topology ledger, the line laying information and the line switch information, a line laying digital twin model of the distribution network is established.

[0021] Optionally, the line laying digital twin model includes several edge processing areas, each of which includes multiple groups of fault recorders, and each of which is equipped with an edge terminal;

[0022] For the edge terminal in each edge processing area, the edge terminal locates the line fault according to the fault traveling wave collected by the fault recorder in the edge processing area and the opening and closing information of the line switch in the edge processing area.

[0023] A fault location device for a distribution network, comprising:

[0024] a line key point determination unit, configured to obtain line laying information and line switch information of the distribution network, and determine a line branch point from the line laying information, and determine a line switch end from the line switch information;

[0025] a fault traveling wave monitoring unit, configured to monitor a first fault traveling wave at the line branch point and a second fault traveling wave at the line switch end;

[0026] a time difference calculation unit, configured to calculate a monitoring time difference between the first fault traveling wave and the second fault traveling wave;

[0027] A fault point locating unit is configured to locate a fault point in the distribution network according to a traveling wave velocity of the first fault traveling wave, a traveling wave velocity of the second fault traveling wave, and the monitoring time difference.

[0028] Optionally, the device further includes:

[0029] a digital twin model establishing unit, configured to establish a line laying digital twin model of the distribution network based on the line laying information and the line switch information, wherein the line laying digital twin model includes line switches;

[0030] A line switch adjustment unit is used to transmit information about the first fault traveling wave and information about the second fault traveling wave to the line laying digital twin model in real time, so that the line laying digital twin model adjusts the opening and closing of the line switch based on the information about the first fault traveling wave and the second fault traveling wave.

[0031] Optionally, the digital twin model building unit includes:

[0032] a first digital twin model establishment subunit, configured to obtain a device information set of the distribution network, wherein the device information set includes device information of a plurality of devices in the distribution network, wherein the device information of each device includes the name, model, specification, manufacturer information of the device, and location information of the device in the distribution network;

[0033] A second digital twin model establishment subunit is used to generate a device topology ledger of the distribution network based on the device information set;

[0034] The third digital twin model establishment subunit is used to establish a line laying digital twin model of the distribution network based on the equipment topology ledger, the line laying information and the line switch information.

[0035] A fault location device for a distribution network, comprising a memory and a processor;

[0036] The memory is used to store programs;

[0037] The processor is used to execute the program to implement the various steps of the fault location method for the distribution network as described above.

[0038] A storage medium stores a computer program thereon, wherein when the computer program is executed by a processor, each step of the above-mentioned method for locating a fault in a distribution network is implemented.

[0039] By means of the above technical solution, the present application obtains the line laying information and line switch information of the distribution network, determines the line branch point from the line laying information, determines the line switch end from the line switch information, monitors the first fault traveling wave at the line branch point, monitors the second fault traveling wave at the line switch end, calculates the monitoring time difference between the first fault traveling wave and the second fault traveling wave, and locates the fault point in the distribution network based on the traveling wave velocity of the first fault traveling wave, the traveling wave velocity of the second fault traveling wave, and the monitoring time difference. It can be seen that by measuring the traveling waves at the line branch point and the line switch end, combining the time difference and the traveling wave velocity of the two traveling waves, the fault point can be accurately located even when the fault occurs in an area with a topological change. Compared with single-end traveling wave monitoring, dual-end monitoring has higher accuracy, making minor faults easier to detect during inspection windows, and avoiding the expansion of minor faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0041] Figure 1 A schematic diagram of a process for locating a fault in a distribution network according to an embodiment of the present application;

[0042] Figure 2 A schematic diagram of the structure of a device for locating a fault in a distribution network provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of the structure of a device for realizing fault location in a distribution network provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] The present application solution can be implemented based on a terminal with data processing capabilities, which can be a computer, cloud, server, etc.

[0046] Next, combine Figure 1 The method for locating a fault in a distribution network of the present application may include the following steps:

[0047] Step S110: Acquire line laying information and line switch information of the distribution network, determine the line branch point from the line laying information, and determine the line switch end from the line switch information.

[0048] Specifically, line layout information may include line physical parameters. These parameters include line type (e.g., overhead line, cable), line length, line cross-sectional area, and line material (e.g., copper, aluminum). Line physical parameters may also include line direction coordinates (e.g., longitude and latitude, tower location), and branch point locations (e.g., branch node number, branch angle). Line physical parameters may also include line connection relationships, such as the connection sequence between busbars and branches, and transformer connection locations.

[0049] Line laying information can also include line topology, which can specifically include line segmentation information, such as the division of main lines and branch lines; the connection relationship between lines and equipment, such as the connection points between lines and transformers and load nodes; and line impedance parameters, such as positive-sequence impedance and zero-sequence impedance.

[0050] Line switch information can include switch device attributes. Switch device attributes include switch type (e.g., circuit breaker, disconnector, section switch, tie switch); switch model, rated voltage / current, breaking capacity; and the physical location of the switch in the distribution network, such as the specific node on a particular line.

[0051] The circuit breaker information may also include the switch operating status, such as the real-time opening and closing status, the switch action history record, the connection relationship between the switch and the circuit breaker, etc.

[0052] A first fault recorder may be arranged at the line branch point, and a second fault recorder may be arranged at the end of the line switch.

[0053] It is understandable that the line branch point is the bifurcation hub of the line topology in the distribution network, and the fault traveling wave will produce complex phenomena such as reflection and refraction here. By determining the branch point through the line laying information and deploying the first fault recorder, the traveling wave signals from different branches can be collected synchronously to avoid missing key features in single-ended monitoring. For example, when a fault occurs in the middle section of a branch line, the traveling wave monitored at the line branch point contains bidirectional traveling wave components of the main line and the branch, which can effectively distinguish the branch where the fault is located. The end of the line switch is the physical dividing point of the line section in the distribution network. By determining its location through the line switch information and deploying the second fault recorder, the distribution network can be divided into switch interval units. When a fault occurs, the traveling wave monitored at the end of the line switch can quickly determine whether the fault is located in the section controlled by the switch, thereby achieving preliminary isolation of the fault section.

[0054] Step S120: monitor a first fault traveling wave at a line branch point, and monitor a second fault traveling wave at a line switch end.

[0055] Specifically, the first fault traveling wave can be obtained by monitoring a first fault recorder, and the second fault traveling wave can be obtained by monitoring a second fault recorder.

[0056] It's understandable that by comparing the polarity and amplitude of the traveling waves at the branch point and at the end of the line switch, it's possible to quickly determine whether the fault is located in the section between them. For example, if a positive traveling wave is detected at the branch point but no traveling wave of the same polarity is detected at the end of the line switch, the fault can be determined to be on the other branch of the line, eliminating the need for detailed troubleshooting of the current section and shortening fault location time.

[0057] Step S130: Calculate the monitoring time difference between the first fault traveling wave and the second fault traveling wave.

[0058] Specifically, the monitoring time difference may represent the time interval between the moment when the first fault recorder receives the first fault traveling wave and the moment when the second fault recorder receives the second fault traveling wave.

[0059] It can be understood that step S130 converts the abstract traveling wave propagation characteristics into specific physical distances through the precise calculation of the time difference between the two ends, providing a core algorithm support with both accuracy and efficiency for fault location in the distribution network, and is a key technical link in achieving rapid self-healing of the smart distribution network.

[0060] Step S140: locating the fault point in the distribution network according to the traveling wave velocity of the first fault traveling wave, the traveling wave velocity of the second fault traveling wave, and the monitoring time difference.

[0061] Specifically, by synchronously collecting the traveling wave signal at the line branch point and the line switch end, the time difference between the two is calculated ( ), combined with the known distance between the two monitoring points (L) and the traveling wave velocity ( 、 ), the fault point can be located by the following formula:

[0062]

[0063] Understandably, traditional single-ended ranging requires a preset traveling wave velocity, and the actual velocity can vary depending on factors such as line material and fault type. Dual-ended ranging utilizes the traveling wave velocities of two monitoring points simultaneously, calibrating them in the calculation and significantly reducing the impact of velocity errors on the results. For example, when monitoring points are located on overhead lines and cables, the dual-ended model automatically adapts to the different velocity parameters to ensure accurate positioning.

[0064] Furthermore, when multiple faults occur in a distribution network, the traveling waves generated by different faults will form independent time difference signatures at the monitoring point. By parallelizing the calculation of multiple sets of time difference data, multiple fault points can be located simultaneously, avoiding the inefficiency of traditional single-ended methods that require troubleshooting each fault individually. This approach is particularly suitable for complex distribution network scenarios.

[0065] The fault location method for the distribution network provided in this embodiment obtains the line laying information and line switch information of the distribution network, determines the line branch point from the line laying information, determines the line switch end from the line switch information, monitors the first fault traveling wave at the line branch point, monitors the second fault traveling wave at the line switch end, calculates the monitoring time difference between the first fault traveling wave and the second fault traveling wave, and locates the fault point in the distribution network based on the traveling wave speed of the first fault traveling wave, the traveling wave speed of the second fault traveling wave, and the monitoring time difference. It can be seen that by measuring the traveling wave at the line branch point and the line switch end, combining the time difference and the traveling wave speed of the two traveling waves, the fault point can be accurately located even when the fault occurs in an area with a topological change. Compared with single-end traveling wave monitoring, dual-end monitoring has higher accuracy, making minor faults easier to detect during the inspection window period, thereby avoiding the expansion of minor faults.

[0066] In some embodiments of the present application, in order to further improve the accuracy of distribution network fault location, the distribution network fault location provided by the present application may further include:

[0067] S1. Based on the line laying information and line switch information, a digital twin model of the distribution network line laying is established.

[0068] Among them, the line laying digital twin model can include line switches.

[0069] Specifically, the process of establishing a digital twin model for line laying may include:

[0070] S11. Obtain a set of equipment information of the distribution network.

[0071] The device information set may include device information of multiple devices in the distribution network. The device information of each device may include the name, model, specifications, manufacturer information, and location information of the device in the distribution network.

[0072] S12. Generate a device topology ledger of the distribution network based on the device information set.

[0073] S13. Based on the equipment topology ledger, line laying information and line switch information, a digital twin model of the distribution network’s line laying is established.

[0074] Specifically, various sensors can be deployed for various devices to record the real-time data of the detection equipment, so as to establish a digital three-dimensional model based on the actual line laying information of the distribution network, and then, in conjunction with the equipment topology ledger, establish a digital twin model of the line laying of the distribution network.

[0075] It is understandable that the line laying digital twin model can accurately reflect the topology, equipment parameters and operating status of the distribution network.

[0076] S2. Transmitting information about the first fault traveling wave and the second fault traveling wave to the line laying digital twin model in real time, so that the line laying digital twin model adjusts the line switch on and off based on the information about the first fault traveling wave and the second fault traveling wave.

[0077] Specifically, after the information of the first fault traveling wave and the second fault traveling wave is transmitted to the line laying digital twin model in real time, the line laying digital twin model can simulate the propagation process of the fault traveling wave in the distribution network line, thereby controlling the opening and closing of the line switch, adjusting the line current direction and traveling wave direction, and locating the fault point.

[0078] Understandably, multiple fault points may exist in a distribution network, and adjustments to line switches can be used to perform multiple measurements and locate faults. Therefore, the line-laying digital twin model can adjust the opening and closing of line switches to adjust the current direction and the direction of the traveling wave, allowing for multiple fault location measurements to accurately locate the fault point.

[0079] In some embodiments of the present application, the line laying digital twin model mentioned in the above embodiments is further introduced. The line laying digital twin model may include several edge processing areas.

[0080] Specifically, each edge processing area may include multiple groups of fault recorders. Each edge processing area is equipped with edge terminals.

[0081] For each edge terminal in the edge processing area, the edge terminal locates the line fault based on the fault traveling wave collected by the fault recorder in the edge processing area and the opening and closing information of the line switch in the edge processing area.

[0082] Edge terminals can communicate directly with fault recorders and circuit breakers within their region, reducing cross-regional data transmission. Even when the distribution network communication network is congested or interrupted, they can still independently locate the fault, avoiding system failures caused by central node failure and improving reliability in extreme situations.

[0083] It's understandable that the edge terminals in each edge processing zone can independently process the fault recorder data within that zone, such as the arrival times and waveform characteristics of the first and second fault traveling waves, as well as the line switch opening and closing information within that zone. This eliminates the need for the edge terminals to upload data to a central server for centralized calculation, compressing the fault location decision cycle from seconds to milliseconds. This is particularly suitable for distribution network protection scenarios with extremely high timeliness requirements. For example, when a fault occurs in an edge zone, the edge terminal can complete the traveling wave time difference calculation and fault section identification within 5ms, which is over 90% faster than traditional centralized architectures.

[0084] Furthermore, the edge terminal can obtain the opening and closing status of the line switches in the area in real time, such as the opening of the section switch and the closing of the tie switch, and dynamically update the local topology model based on this. For example, when a section switch is opened, resulting in the area being divided into two sub-sections, the edge terminal automatically adjusts the line parameters in the fault location algorithm to avoid positioning deviations caused by the lag of the static topology model. Each edge processing area corresponds to a physical section of the distribution network (such as a feeder branch or substation). The edge terminal can locate the fault to the "section level" (error <1km) or even the "node level" (error <100m). Combined with the line switch status, it can directly determine the switchgear that needs to be operated, achieve precise isolation, and reduce the scope of power outages in non-fault areas.

[0085] The following describes a fault location device for implementing a distribution network provided in an embodiment of the present application. The fault location device for implementing a distribution network described below and the fault location method for implementing a distribution network described above can refer to each other.

[0086] See also Figure 2 , Figure 2 This is a schematic diagram of the structure of a fault location device for a distribution network disclosed in an embodiment of the present application.

[0087] like Figure 2 As shown, the device may include:

[0088] A line key point determination unit 11 is configured to obtain line laying information and line switch information of the distribution network, and determine line branch points from the line laying information and determine line switch ends from the line switch information;

[0089] A fault traveling wave monitoring unit 12 is configured to monitor a first fault traveling wave at the line branch point and a second fault traveling wave at the line switch end;

[0090] a time difference calculation unit 13, configured to calculate a monitoring time difference between the first fault traveling wave and the second fault traveling wave;

[0091] The fault point locating unit 14 is configured to locate the fault point in the distribution network according to the traveling wave speed of the first fault traveling wave, the traveling wave speed of the second fault traveling wave, and the monitoring time difference.

[0092] Optionally, a first fault recorder is provided at the line branch point, and a second fault recorder is provided at the end of the line switch;

[0093] The first fault traveling wave is obtained by monitoring the first fault recorder, and the second fault traveling wave is obtained by monitoring the second fault recorder.

[0094] Optionally, the device further includes:

[0095] a digital twin model establishing unit, configured to establish a line laying digital twin model of the distribution network based on the line laying information and the line switch information, wherein the line laying digital twin model includes line switches;

[0096] A line switch adjustment unit is used to transmit information about the first fault traveling wave and information about the second fault traveling wave to the line laying digital twin model in real time, so that the line laying digital twin model adjusts the opening and closing of the line switch based on the information about the first fault traveling wave and the second fault traveling wave.

[0097] Optionally, the digital twin model building unit includes:

[0098] a first digital twin model establishment subunit, configured to obtain a device information set of the distribution network, wherein the device information set includes device information of a plurality of devices in the distribution network, wherein the device information of each device includes the name, model, specification, manufacturer information of the device, and location information of the device in the distribution network;

[0099] A second digital twin model establishment subunit is used to generate a device topology ledger of the distribution network based on the device information set;

[0100] The third digital twin model establishment subunit is used to establish a line laying digital twin model of the distribution network based on the equipment topology ledger, the line laying information and the line switch information.

[0101] Optionally, the line laying digital twin model includes several edge processing areas, each of which includes multiple groups of fault recorders, and each of which is equipped with an edge terminal;

[0102] For the edge terminal in each edge processing area, the edge terminal locates the line fault according to the fault traveling wave collected by the fault recorder in the edge processing area and the opening and closing information of the line switch in the edge processing area.

[0103] The fault location device for a distribution network provided in the embodiment of the present application can be applied to fault location equipment for a distribution network, such as terminals: mobile phones, computers, etc. Optionally, Figure 3 The hardware structure diagram of the fault location device of the distribution network is shown. Figure 3 ,The hardware structure of the fault location device of the distribution network may include: at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4;

[0104] In the embodiment of the present application, the number of the processor 1, the communication interface 2, the memory 3, and the communication bus 4 is at least one, and the processor 1, the communication interface 2, and the memory 3 communicate with each other through the communication bus 4;

[0105] The processor 1 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention;

[0106] The memory 3 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory;

[0107] The memory stores a program, and the processor can call the program stored in the memory, wherein the program is used to:

[0108] Acquire line laying information and line switch information of the distribution network, and determine a line branch point from the line laying information, and determine a line switch end from the line switch information;

[0109] monitoring a first fault traveling wave at the line branch point and a second fault traveling wave at the line switch end;

[0110] calculating a monitoring time difference between the first fault traveling wave and the second fault traveling wave;

[0111] The fault point in the distribution network is located according to the traveling wave speed of the first fault traveling wave, the traveling wave speed of the second fault traveling wave, and the monitoring time difference.

[0112] Optionally, the detailed functions and extended functions of the program may refer to the above description.

[0113] An embodiment of the present application further provides a storage medium, which may store a program suitable for execution by a processor, wherein the program is used to:

[0114] Acquire line laying information and line switch information of the distribution network, and determine a line branch point from the line laying information, and determine a line switch end from the line switch information;

[0115] monitoring a first fault traveling wave at the line branch point and a second fault traveling wave at the line switch end;

[0116] calculating a monitoring time difference between the first fault traveling wave and the second fault traveling wave;

[0117] The fault point in the distribution network is located according to the traveling wave speed of the first fault traveling wave, the traveling wave speed of the second fault traveling wave, and the monitoring time difference.

[0118] Optionally, the detailed functions and extended functions of the program may refer to the above description.

[0119] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0120] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referenced to each other.

[0121] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for locating a fault in a distribution network, characterized in that: include: Acquire line laying information and line switch information of the distribution network, and determine a line branch point from the line laying information, and determine a line switch end from the line switch information; monitoring a first fault traveling wave at the line branch point and a second fault traveling wave at the line switch end; calculating a monitoring time difference between the first fault traveling wave and the second fault traveling wave; A fault point in the distribution network is located according to the traveling wave speed of the first fault traveling wave, the traveling wave speed of the second fault traveling wave, and the monitoring time difference.

2. The method according to claim 1, characterized in that The line branch point is provided with a first fault recorder, and the line switch end is provided with a second fault recorder; The first fault traveling wave is obtained by monitoring the first fault recorder, and the second fault traveling wave is obtained by monitoring the second fault recorder.

3. The method according to claim 1, characterized in that Also includes: Based on the line laying information and the line switch information, establishing a line laying digital twin model of the distribution network, wherein the line laying digital twin model includes line switches; The information of the first fault traveling wave and the information of the second fault traveling wave are transmitted in real time to the line laying digital twin model, so that the line laying digital twin model adjusts the opening and closing of the line switch based on the information of the first fault traveling wave and the information of the second fault traveling wave.

4. The method according to claim 3, characterized in that Based on the line laying information and the line switch information, a line laying digital twin model of the distribution network is established, including: Acquire a device information set of the distribution network, the device information set including device information of a plurality of devices in the distribution network, the device information of each device including the name, model, specifications, manufacturer information of the device, and location information of the device in the distribution network; Generating a device topology ledger of the distribution network according to the device information set; Based on the equipment topology ledger, the line laying information and the line switch information, a line laying digital twin model of the distribution network is established.

5. The method according to claim 3, characterized in that The line laying digital twin model includes several edge processing areas, each of which includes multiple groups of fault recorders, and each of which is equipped with an edge terminal; For the edge terminal in each edge processing area, the edge terminal locates the line fault according to the fault traveling wave collected by the fault recorder in the edge processing area and the opening and closing information of the line switch in the edge processing area.

6. A fault location device for a distribution network, characterized in that: include: a line key point determination unit, configured to obtain line laying information and line switch information of the distribution network, and determine a line branch point from the line laying information, and determine a line switch end from the line switch information; a fault traveling wave monitoring unit, configured to monitor a first fault traveling wave at the line branch point and a second fault traveling wave at the line switch end; a time difference calculation unit, configured to calculate a monitoring time difference between the first fault traveling wave and the second fault traveling wave; A fault point locating unit is configured to locate a fault point in the distribution network according to a traveling wave velocity of the first fault traveling wave, a traveling wave velocity of the second fault traveling wave, and the monitoring time difference.

7. The device according to claim 6, characterized in that The line branch point is provided with a first fault recorder, and the line switch end is provided with a second fault recorder; The first fault traveling wave is obtained by monitoring the first fault recorder, and the second fault traveling wave is obtained by monitoring the second fault recorder.

8. The device according to claim 6, characterized in that Also includes: a digital twin model establishing unit, configured to establish a line laying digital twin model of the distribution network based on the line laying information and the line switch information, wherein the line laying digital twin model includes line switches; The line switch adjustment unit is used to transmit the information of the first fault traveling wave and the information of the second fault traveling wave to the line laying digital twin model in real time, so that the line laying digital twin model adjusts the opening and closing of the line switch based on the information of the first fault traveling wave and the information of the second fault traveling wave.

9. A fault location device for a distribution network, characterized in that: including memory and processor; The memory is used to store programs; The processor is used to execute the program to implement each step of the fault location method for the distribution network according to any one of claims 1 to 5.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, each step of the fault location method for a distribution network as claimed in any one of claims 1 to 5 is implemented.

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