Fault determination apparatus and method for power distribution line, storage medium, and electronic device

Abstract

The present application discloses a fault determination apparatus and method for a power distribution line, a storage medium, and an electronic device. The apparatus comprises: an acquisition and transformation unit, used for acquiring voltage traveling wave information of a power distribution line, and performing transformation processing on the voltage traveling wave information to obtain transformed voltage traveling wave information; and a fault sampling and analysis unit, used for performing sampling processing on the transformed voltage traveling wave information to obtain sampled voltage traveling wave information, wherein the sampled voltage traveling wave information comprises transient quantity information, and the fault sampling and analysis unit determines that a fault occurs when determining that the transient quantity information meets a preset condition. In the present application, the problem of a fault of a power distribution line can be determined by acquiring voltage traveling wave information of the power distribution line, and performing transformation, sampling, and analysis on the voltage traveling wave information. Compared with the currently widely used scheme in which a fault is determined on the basis of current traveling wave information of a current transformer, the present application is more suitable for the tail end of a power distribution line or the situation where an interconnection switch is turned on at a single side, and can solve the problem of insensitivity of a traveling wave signal when the load is small.

Description

Fault diagnosis devices, methods, storage media and electronic equipment for power distribution lines

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202410804831.8, filed on June 20, 2024, entitled "Fault Detection Apparatus, Method, Storage Medium and Electronic Equipment for Power Distribution Lines", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of power distribution line fault location, specifically to a fault judgment device, method, storage medium, and electronic device for power distribution lines. Background Technology

[0004] The power distribution network is a crucial hub connecting the power transmission chain and power users, and its power supply reliability directly affects users' production and daily life. Compared with transmission lines, distribution lines are more complex in structure, have a higher frequency of faults, and are prone to causing power outages and economic losses for users. Some grounding faults can even lead to serious accidents such as electric shock and forest fires.

[0005] Rapidly locating and eliminating faults in power distribution lines has always been a pressing issue. Advances in distribution network automation, local protection, low-current grounding fault location, and intelligent distributed technologies have enabled rapid and selective isolation of faulty sections to prevent further escalation of accidents. However, accurately pinpointing the exact location of a line fault remains difficult, still requiring significant manpower and resources to investigate the fault.

[0006] Currently, some regions have piloted the use of fault location equipment based on the current traveling wave method, but the inventors of this application have discovered the following problems in its use:

[0007] 1. The power distribution network has a complex structure with many branches and frequent power transfers. The current at the end of the power distribution line is weak. At the same time, the impedance of the current traveling wave is uneven. After the fault current traveling wave is reflected, the information loss of the current traveling wave is large. Therefore, the current traveling wave method is no longer applicable to fault location of power distribution lines.

[0008] 2. The fault traveling wave information acquisition scheme based on power distribution line circuit breakers may affect the flexibility of traveling wave ranging point deployment in power distribution lines in cases where it is not suitable to install circuit breakers or where the original circuit breakers are not suitable for modification.

[0009] 3. Non-contact traveling wave information acquisition methods, such as electromagnetic induction-based traveling wave information acquisition schemes, cannot distinguish the fault phase of the power distribution line, and the voltage traveling wave information is easily interfered with. Summary of the Invention

[0010] According to a first aspect of this application, a fault diagnosis device for a power distribution line is provided. The device includes: a data acquisition and transmission unit for acquiring voltage traveling wave information of the power distribution line and performing transmission processing on the voltage traveling wave information to obtain transmission voltage traveling wave information; and a fault sampling and analysis unit for sampling processing on the transmission voltage traveling wave information to obtain sampled voltage traveling wave information, wherein the sampled voltage traveling wave information includes transient quantity information. If the fault sampling and analysis unit determines that the transient quantity information meets preset conditions, then it determines that a fault has occurred.

[0011] According to some embodiments of the first aspect of this application, the data acquisition and transmission unit includes: a high-voltage base; at least three high-voltage acquisition columns disposed on the high-voltage base; a voltage traveling wave acquisition unit disposed on the high-voltage acquisition columns to acquire voltage traveling wave information; and a voltage traveling wave transducer disposed inside the high-voltage base and connected to the voltage traveling wave acquisition unit to perform transmission processing on the voltage traveling wave information to obtain transmitted voltage traveling wave information.

[0012] According to some embodiments of the first aspect of this application, the fault sampling and analysis unit includes: a sampler connected to a voltage traveling wave transducer, which filters the transducer voltage traveling wave information to obtain sampled voltage traveling wave information, the sampled voltage traveling wave information including transient quantities; and a fault analyzer connected to the sampler, which determines that a fault has occurred if the transient quantity information meets preset conditions.

[0013] According to some embodiments of the first aspect of this application, the fault determination device further includes a power supply unit connected to the fault sampling and analysis unit to supply power to the fault sampling and analysis unit; the power supply unit includes: an energy harvesting unit to harvest electrical energy from the power distribution line and supply power to the fault sampling and analysis unit; and a backup power supply to supply power to the fault sampling and analysis unit in the event of a fault in the power distribution line.

[0014] According to some embodiments of the first aspect of this application, the energy harvesting unit includes: a primary energy harvesting device, disposed on a high-voltage acquisition column and connected to a power distribution line to acquire electrical energy from the power distribution line; a secondary energy harvesting device, disposed within a high-voltage base and connected to the primary energy harvesting device, cooperating with the primary energy harvesting device to step down the acquired electrical energy; and an energy harvesting module, disposed within a high-voltage base and connected to the secondary energy harvesting device to acquire electrical energy from the secondary energy harvesting device.

[0015] According to some embodiments of the first aspect of this application, the energy harvesting unit includes: a secondary energy harvesting device, disposed in a high-voltage base, connected to a voltage traveling wave collector, receiving the electrical energy of the power distribution line acquired by the voltage traveling wave collector, and cooperating with the voltage traveling wave collector to step down the acquired electrical energy; and an energy harvesting module, disposed in a high-voltage base, connected to the secondary energy harvesting device, and acquiring the electrical energy of the secondary energy harvesting device.

[0016] According to a second aspect of this application, a fault judgment method for a power distribution line is also provided. The method includes: acquiring voltage traveling wave information of the power distribution line; performing transmission processing on the voltage traveling wave information to obtain transmission voltage traveling wave information; performing sampling processing on the transmission voltage traveling wave information to obtain sampled voltage traveling wave information, wherein the sampled voltage traveling wave information includes transient quantity information; and determining that a fault has occurred if the transient quantity information meets preset conditions.

[0017] According to some embodiments of the second aspect of this application, obtaining voltage traveling wave information of a power distribution line includes: acquiring voltage traveling wave information of each phase of the power distribution line by electrically connecting the power distribution line to a preset voltage traveling wave acquisition element via a cable.

[0018] According to some embodiments of the second aspect of this application, the voltage traveling wave information is processed by transmission to obtain the transmitted voltage traveling wave information, which includes: based on a preset transmission element, the voltage traveling wave information is transmitted within the characteristic frequency range of the traveling wave to obtain the transmitted voltage traveling wave information.

[0019] According to some embodiments of the second aspect of this application, sampling processing of the transducer voltage traveling wave information to obtain sampled voltage traveling wave information includes: filtering the transducer voltage traveling wave information based on a preset filtering circuit and a preset sampling circuit to obtain sampled voltage traveling wave information.

[0020] According to a third aspect of this application, this application also provides a non-volatile computer-readable storage medium having a computer program stored thereon, the computer program being able to implement the fault diagnosis method for power distribution lines as described above.

[0021] According to a fourth aspect of this application, this application also provides an electronic device for determining faults in power distribution lines, comprising: one or more processors; and a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors are able to implement the fault determination method for power distribution lines as described above.

[0022] The technical solution of this application can determine the faults in power distribution lines by acquiring voltage traveling wave information and performing transmission, sampling, and analysis on this information. Compared with the currently widely used current traveling wave information scheme based on current transformers, it is more suitable for situations where the power distribution line ends or the tie switch is switched on one side, and can solve the problem of insensitive traveling wave signals under low load conditions.

[0023] The technical solution of this application obtains the voltage traveling wave information of the power distribution line by directly connecting it to the power distribution line electrically. It can obtain the voltage traveling wave information of the power distribution line by phase, and the voltage traveling wave information is stable and clear.

[0024] The technical solution of this application can effectively determine the faulty phase of the power distribution line by processing and analyzing the voltage traveling wave information of each phase of the power distribution line. It has the characteristics of simple circuit structure and low manufacturing cost. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 shows a schematic diagram of a fault diagnosis device for a power distribution line according to an example embodiment of this application;

[0027] Figure 2 shows a schematic diagram of an external fault sampling and analysis unit and a backup power supply according to an example embodiment of this application;

[0028] Figure 3 shows a schematic diagram of the data acquisition and transmission unit and the energy harvesting unit according to an example embodiment of this application;

[0029] Figure 4 shows a schematic diagram of a data acquisition and transmission unit and an energy harvesting unit according to another exemplary embodiment of this application;

[0030] Figure 5 shows a schematic diagram of a fault sampling and analysis unit and a built-in backup power supply according to an example embodiment of this application;

[0031] Figure 6 shows a schematic flowchart of a fault diagnosis method for a power distribution line according to an example embodiment of this application.

[0032] Reference numerals: Fault diagnosis device 1, data acquisition and transmission unit 10, high voltage base 11, high voltage acquisition column 12, voltage traveling wave data acquisition unit 13, voltage traveling wave transducer 14, fault sampling and analysis unit 20, sampler 21, fault analyzer 22, power supply unit 30, energy harvesting unit 31, primary energy harvesting device 311, secondary energy harvesting device 312, energy harvesting module 313, backup power supply 32. Detailed Implementation

[0033] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0034] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0035] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0036] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order.

[0037] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] According to a first aspect of this application, this application provides a fault diagnosis device for power distribution lines. FIG1 shows a schematic diagram of a fault diagnosis device for power distribution lines according to an embodiment of this application.

[0039] According to an example embodiment, referring to Figure 1, the fault diagnosis device 1 for a power distribution line includes a data acquisition and transmission unit 10 and a fault sampling and analysis unit 20. The data acquisition and transmission unit 10 acquires voltage traveling wave information of the power distribution line and performs transmission processing on the voltage traveling wave information to obtain transmitted voltage traveling wave information. The fault sampling and analysis unit 20 samples the transmitted voltage traveling wave acquisition information to obtain sampled voltage traveling wave information, which includes transient quantity information. If the fault sampling and analysis unit 20 determines that the transient quantity information meets preset conditions, then it determines that a fault has occurred.

[0040] According to the example embodiment, the power distribution line includes three phases. The voltage traveling wave information of each phase is collected and processed by the transmission and transformation unit 10 and the fault sampling and analysis unit 20. In the event of a fault in the power distribution line, the voltage traveling wave information includes transient quantity information. By monitoring the transient quantity information, it can be determined that a fault has occurred in the power distribution line. For example, a starting element is set in the fault sampling and analysis unit 20. The starting element can be an element that uses the high-frequency transient information generated by the fault or disturbance as the starting condition. When the transient quantity information reaches the designed starting threshold, the starting element is triggered and the fault sampling and analysis unit 20 determines that a fault has occurred in the power distribution line.

[0041] The technical solution of this application can determine the faults in power distribution lines by acquiring voltage traveling wave information and performing transmission, sampling, and analysis on this information. Compared with the currently widely used current traveling wave information scheme based on current transformers, it is more suitable for situations where the power distribution line ends or the tie switch is switched on one side, and can solve the problem of insensitive traveling wave signals under low load conditions.

[0042] Optionally, referring to Figures 2 and 3, the acquisition and transmission unit 10 includes a high-voltage base 11, at least three high-voltage acquisition columns 12, a voltage traveling wave acquisition device 13, and a voltage traveling wave transducer 14.

[0043] According to the example embodiment, the high-voltage base 11 can be installed near the power distribution line to be sampled. At least three high-voltage sampling posts 12 are set on the high-voltage base 11, and the high-voltage cables installed on the high-voltage sampling posts 12 are connected to the power distribution line. The high-voltage cables can be electrically connected to the metal conductor of the power distribution line by bolts or clamps; or, if the power distribution line has an insulation layer, preventing the high-voltage cables from being directly electrically connected to the power distribution line, electrical piercing technology can be used to establish an electrical connection between the high-voltage cables and the power distribution line.

[0044] According to the example embodiment, at least three voltage traveling wave (TW) collectors 13 are installed on at least three high-voltage acquisition poles 12 (not shown in the figure) to collect voltage TW information of the power distribution line. At least three voltage TW transformers 14 are installed inside the high-voltage base 11 (not shown in the figure) and connected to the high-voltage TW collectors to perform transmission processing on the voltage TW information. This involves transmitting the voltage TW information to its characteristic frequency information and adjusting the effective transmission range of the voltage TW transformers 14 to meet the voltage TW frequency characteristics, thereby enabling high-fidelity transmission of the voltage TW information.

[0045] The technical solution of this application obtains the voltage traveling wave information of the power distribution line by directly connecting it to the power distribution line electrically. It can obtain the voltage traveling wave information of the power distribution line by phase, and the voltage traveling wave information is stable and clear.

[0046] Optionally, referring to Figure 1, the fault sampling and analysis unit 20 includes a sampler 21 and a fault analyzer 22. The sampler 21 is connected to the voltage traveling wave transducer 14 and filters the transducer voltage traveling wave information to obtain sampled voltage traveling wave information, which includes steady-state information and transient information.

[0047] For example, the voltage traveling wave information transmitted through the voltage traveling wave converter 14 contains a large power frequency component, as well as high-frequency components introduced by power, switching, and power supply. The presence of this information will affect the accuracy of the traveling wave fault location analysis. After transmission, the voltage traveling wave information passes through a bandpass filter circuit and a sampling circuit. The sampling circuit meets the requirements of parameters such as the voltage level, line type, and installation location of the distribution line used. The sampling circuit includes a sampling resistor, sampling gain, and sampling frequency, and the sampling frequency must at least satisfy the Nyquist sampling theorem.

[0048] According to the example embodiment, the fault analyzer 22 is connected to the sampler 21. If the transient quantity information meets the preset conditions, then the fault is determined to have occurred.

[0049] For example, the fault analyzer 22 buffers and analyzes the sampled voltage traveling wave information. When the transient information meets preset conditions, it determines that a power distribution line fault has occurred. For instance, a starting element is set in the fault analyzer 22. This starting element can be a component that uses high-frequency transient information generated by a fault or disturbance as a starting condition. When the transient information reaches a designed starting threshold, the starting element is triggered. The fault analyzer 22 performs cross-sectional latching and analysis of the voltage traveling wave information of the starting element during several time periods before and after its activation. For example, depending on the application and hardware characteristics of the fault analyzer 22, one or more transient fault feature analysis algorithms, such as wavelet packet analysis, Hilbert-Huang analysis, and short-time Fourier analysis, can be used to analyze the latched voltage traveling wave information, extracting effective information such as the traveling wave head and traveling wave characteristics for fault location analysis.

[0050] The technical solution of this application can effectively determine the faulty phase of the power distribution line by processing and analyzing the voltage traveling wave information of each phase of the power distribution line. It has the characteristics of simple circuit structure and low manufacturing cost.

[0051] Optionally, referring to Figures 2 and 3, the fault diagnosis device 1 for the power distribution line further includes a power supply unit 30, which is connected to the fault sampling and analysis unit 20 and supplies power to the fault sampling and analysis unit 20. The power supply unit 30 includes an energy harvesting unit 31 and a backup power supply 32. The energy harvesting unit 31 harvests electrical energy from the power distribution line and supplies power to the fault sampling and analysis unit 20.

[0052] According to the example embodiment, referring to Figure 3, the energy harvesting unit 31 may include a primary energy harvesting device 311, a secondary energy harvesting device 312, and an energy harvesting module 313. The primary energy harvesting device 311 is disposed on the high-voltage acquisition column 12, connected to the power distribution line, and acquires electrical energy from the power distribution line. The secondary energy harvesting device 312 is disposed within the high-voltage base 11, connected to the primary energy harvesting device 311, and cooperates with the primary energy harvesting device 311 to step down the acquired electrical energy. The energy harvesting module 313 is disposed within the high-voltage base 11, connected to the secondary energy harvesting device 312, and acquires electrical energy from the secondary energy harvesting device 312.

[0053] According to another embodiment, referring to FIG4, the energy harvesting unit 31 may include a secondary energy harvesting device 312 and an energy harvesting module 313. The secondary energy harvesting device 312 is disposed within the high-voltage base 11, connected to a voltage traveling wave collector 13, receives the electrical energy from the power distribution line acquired by the voltage traveling wave collector 13, and cooperates with the voltage traveling wave collector 13 to step down the acquired electrical energy. The energy harvesting module 313 is disposed within the high-voltage base 11, connected to the secondary energy harvesting device 312, and acquires the electrical energy from the secondary energy harvesting device 312.

[0054] According to the example embodiment, the fault sampling and analysis unit 20 and the backup power supply 32 can be located outside or inside the high-voltage base 11.

[0055] For example, referring to Figure 2, when the fault sampling and analysis unit 20 and the backup power supply 32 are located outside the high-voltage base 11, the voltage traveling wave information passes through the voltage traveling wave collector 13 and the voltage traveling wave transducer 14, and then through the external cable to the fault sampling and analysis unit 20. The electrical energy is transmitted to the fault sampling and analysis unit 20 through the energy harvesting unit 31 via the external cable.

[0056] For example, referring to Figure 5, when the fault sampling and analysis unit 20 and the backup power supply 32 are located within the high-voltage base 11, voltage traveling wave information and power extraction are integrated within the high-voltage base 11. This makes the structure of the fault judgment device 1 flexible and adaptable to different power distribution line environments.

[0057] The technical solution of this application integrates voltage traveling wave acquisition and energy extraction, which can avoid the ferroresonance problem caused by using voltage transformers for energy extraction, and also avoid the seasonal and environmental influences of using solar energy extraction and other methods. This improves the energy extraction reliability of the fault judgment device 1 for power distribution lines and facilitates convenient installation, operation and maintenance of the fault judgment device 1.

[0058] According to a second aspect of this application, this application also provides a fault judgment method for power distribution lines. FIG6 shows a schematic flowchart of a fault judgment method according to an embodiment of this application.

[0059] Referring to Figure 6, the fault diagnosis method for power distribution lines includes steps S101-S104.

[0060] In step S101, the fault diagnosis device acquires the voltage traveling wave information of the power distribution line.

[0061] According to the example embodiment, the fault diagnosis device, based on a preset voltage traveling wave acquisition element, connects to the power distribution line via a cable to obtain the voltage traveling wave information of each phase of the power distribution line. The fault diagnosis device is connected to the power distribution line via a high-voltage cable. The high-voltage cable can be electrically connected to the metal conductor of the power distribution line using bolts or clamps. If the power distribution line has an insulation layer, preventing a direct electrical connection between the high-voltage cable and the power distribution line, techniques such as electrical piercing can be used to establish an electrical connection between the high-voltage cable and the power distribution line.

[0062] For example, the voltage traveling wave acquisition element can be a voltage traveling wave acquisition device.

[0063] In step S102, the fault diagnosis device performs transmission processing on the voltage traveling wave information to obtain the transmitted voltage traveling wave information.

[0064] According to the example embodiment, the fault diagnosis device presets a voltage traveling wave transmission element, performs transmission processing on the voltage traveling wave information based on the voltage traveling wave transmission element, performs transmission of the traveling wave characteristic frequency information on the voltage traveling wave information, and adjusts the effective transmission range of the voltage traveling wave transmission element to meet the voltage traveling wave frequency characteristics, so as to enable high-fidelity transmission of the voltage traveling wave information.

[0065] For example, the voltage traveling wave transmission element can be a voltage traveling wave transducer.

[0066] In step S103, the fault diagnosis device samples the traveling wave information of the transmission voltage to obtain sampled traveling wave information, which includes transient quantity information.

[0067] According to the example embodiment, the sampled voltage traveling wave information includes steady-state and transient information. For example, the voltage traveling wave information after transmission processing by the fault diagnosis device contains a large power frequency component, as well as high-frequency components introduced by power, switches, and power supplies. The presence of this information will affect the accuracy of the fault diagnosis device's analysis. After transmission, the voltage traveling wave information passes through a bandpass filter circuit and a sampling circuit. The sampling circuit meets the requirements of parameters such as the voltage level, line type, and installation location of the distribution line used. The sampling circuit includes a sampling resistor, a sampling gain, and a sampling frequency, and the sampling frequency at least satisfies the Nyquist sampling theorem.

[0068] In step S104, if the fault determination device determines that the transient quantity information meets the preset conditions, then it determines that a fault has occurred.

[0069] According to the example embodiment, the fault diagnosis device buffers and analyzes the sampled voltage traveling wave information. When the transient information meets preset conditions, it determines that a power distribution line fault has occurred. For example, a starting element is set in the fault diagnosis device. This element can be a component that uses high-frequency transient information generated by a fault or disturbance as the starting condition. When the transient information reaches the designed starting threshold, the starting element is triggered. The fault diagnosis device performs cross-sectional latching and analysis of the voltage traveling wave information of the starting element within a certain time period before and after its activation. For example, depending on the application and hardware characteristics of the fault diagnosis device, one or more transient fault feature analysis algorithms, such as wavelet packet analysis, Hilbert-Huang analysis, and short-time Fourier analysis, can be selected to analyze the latched voltage traveling wave information and extract effective information such as the traveling wave head and traveling wave characteristics for fault location analysis.

[0070] The technical solution of this application can determine the faults in power distribution lines by acquiring voltage traveling wave information and performing transmission, sampling, and analysis on this information. Compared with the currently widely used current traveling wave information scheme based on current transformers, it is more suitable for situations where the power distribution line ends or the tie switch is switched on one side, and can solve the problem of insensitive traveling wave signals under low load conditions.

[0071] The technical solution of this application obtains the voltage traveling wave information of the power distribution line by directly connecting it to the power distribution line electrically. It can obtain the voltage traveling wave information of the power distribution line by phase, and the voltage traveling wave information is stable and clear.

[0072] The technical solution of this application can effectively determine the faulty phase of the power distribution line by processing and analyzing the voltage traveling wave information of each phase of the power distribution line. It has the characteristics of simple circuit structure and low manufacturing cost.

[0073] The technical solution of this application integrates voltage traveling wave acquisition and energy extraction, which can avoid the ferroresonance problem caused by using voltage transformers for energy extraction, and also avoid the seasonal and environmental influences of using solar energy extraction and other methods. This improves the energy extraction reliability of the fault diagnosis device for power distribution lines and facilitates convenient installation, operation and maintenance of the fault diagnosis device.

[0074] According to a third aspect of this application, this application also provides a non-volatile computer-readable storage medium having a computer program stored thereon, the computer program being able to implement the fault diagnosis method for power distribution lines as described above.

[0075] According to a fourth aspect of this application, this application also provides an electronic device for determining faults in power distribution lines, comprising: one or more processors; and a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors are able to implement the fault determination method for power distribution lines as described above.

[0076] Finally, it should be noted that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions of the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fault diagnosis device for a power distribution line, wherein, include: The data acquisition and transmission unit obtains the voltage traveling wave information of the power distribution line, and performs transmission processing on the voltage traveling wave information to obtain the transmitted voltage traveling wave information. The fault sampling and analysis unit samples and processes the traveling wave information of the transformer voltage to obtain sampled traveling wave information, which includes transient quantity information. If the fault sampling and analysis unit determines that the transient quantity information meets preset conditions, then it determines that a fault has occurred.

2. The fault diagnosis device according to claim 1, wherein, The data acquisition and transmission unit includes: High-voltage base; At least three high-voltage acquisition columns are installed on the high-voltage base; A voltage traveling wave acquisition device is installed on the high-voltage acquisition column to acquire the voltage traveling wave information; A voltage traveling wave converter is installed inside the high-voltage base and connected to the voltage traveling wave collector to perform transmission processing on the voltage traveling wave information to obtain the transmitted voltage traveling wave information.

3. The fault diagnosis device according to claim 2, wherein, The fault sampling and analysis unit includes: A sampler is connected to the voltage traveling wave transducer and filters the transducer voltage traveling wave information to obtain the sampled voltage traveling wave information, wherein the sampled voltage traveling wave information includes the transient quantity. A fault analyzer, connected to the sampler, determines that a fault has occurred if the transient quantity information meets the preset conditions.

4. The fault diagnosis device according to claim 3, wherein, The fault diagnosis device further includes: A power supply unit is connected to the fault sampling and analysis unit and supplies power to the fault sampling and analysis unit. The power supply unit includes: The power acquisition unit acquires electrical energy from the power distribution line and supplies power to the fault sampling and analysis unit; A backup power supply is provided to the fault sampling and analysis unit in the event of a fault in the power distribution line.

5. The fault diagnosis device according to claim 4, wherein, The energy harvesting unit includes: A primary energy harvesting device is installed on the high-voltage acquisition column, connected to the power distribution line, and acquires the electrical energy of the power distribution line; A secondary energy harvesting device is disposed within the high-voltage base and connected to the primary energy harvesting device. It works in conjunction with the primary energy harvesting device to step down the voltage of the acquired electrical energy. An energy harvesting module is disposed within the high-voltage base and connected to the secondary energy harvesting device to obtain the electrical energy from the secondary energy harvesting device.

6. The fault diagnosis device according to claim 4, wherein, The energy harvesting unit includes: A secondary energy harvesting device is installed inside the high-voltage base, connected to the voltage traveling wave collector, to receive the electrical energy of the power distribution line acquired by the voltage traveling wave collector, and cooperates with the voltage traveling wave collector to step down the acquired electrical energy. An energy harvesting module is disposed within the high-voltage base and connected to the secondary energy harvesting device to obtain the electrical energy from the secondary energy harvesting device.

7. A method for fault diagnosis of a power distribution line, wherein, The method includes: Obtain voltage traveling wave information of power distribution lines; The voltage traveling wave information is subjected to transmission processing to obtain transmitted voltage traveling wave information; The voltage traveling wave information is sampled to obtain sampled voltage traveling wave information, which includes transient quantity information. If the transient quantity information is determined to meet the preset conditions, then a fault is determined to have occurred.

8. The fault diagnosis method according to claim 7, wherein, The acquisition of voltage traveling wave information of the power distribution line includes: Based on a preset voltage traveling wave acquisition element, the voltage traveling wave information of each phase of the power distribution line is obtained through a cable electrically connected to the power distribution line.

9. The fault diagnosis method according to claim 7, wherein, The process of performing a transmission transformation on the voltage traveling wave information to obtain the transmitted voltage traveling wave information includes: Based on a preset transmission element, the voltage traveling wave information is transmitted within the characteristic frequency range of the traveling wave to obtain the transmitted voltage traveling wave information.

10. The fault diagnosis method according to claim 7, wherein, The sampling process of the transformer voltage traveling wave information to obtain sampled voltage traveling wave information includes: Based on a preset filtering circuit and a preset sampling circuit, the traveling wave information of the transmission voltage is filtered to obtain the sampled traveling wave information.

11. A non-volatile computer-readable storage medium having a computer program stored thereon, wherein, The computer program implements the fault diagnosis method as described in any one of claims 7-10.

12. An electronic device, wherein, include: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the fault diagnosis method as described in any of claims 7-10.

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