Active compensation type wireless partial discharge fault positioning method, system, device, equipment and medium

Abstract

The invention belongs to the field of detection of power transmission and distribution lines and high-voltage equipment, and particularly relates to an active compensation type wireless partial discharge fault positioning method, system, device and equipment and a medium. The method comprises the following steps: acquiring a time difference T1 when a second sensor receives a first test signal compared with a first sensor; obtaining a time difference T2 when the second sensor receives the second test signal compared with the first sensor; obtaining a time error formula delta T between the two sensor atomic clocks according to the time difference of the first test signal and the time difference of the second test signal; the time difference T3 of the partial discharge signal of the second sensor compared with the partial discharge signal of the first sensor is obtained, the distance X2 between the partial discharge position and the first position is calculated according to the T3, the T1, the delta T and the transmission speed v of the test signal in the power equipment, and the X2 is the distance between the partial discharge position and the first position. According to the invention, the technical problem that the positioning of the partial discharge position is not accurate enough in the prior art is solved.

Description

Technical Field

[0001] This invention belongs to the field of power transmission and distribution line and high-voltage equipment detection, and specifically relates to an active compensation wireless partial discharge fault location method, system, device, equipment and medium. Background Technology

[0002] During long-term operation, electrical equipment is prone to developing localized non-uniform electric fields due to factors such as insulation deterioration, poor construction techniques, and environmental aging. This can lead to partial discharges that fail to penetrate the insulation. This discharge process causes continuous and irreversible cumulative damage to the insulation material, potentially resulting in insulation breakdown and short circuits. This not only renders the equipment unable to transmit electrical energy normally but also poses a serious threat to the stable operation of the entire power system.

[0003] To promptly detect and locate partial discharges, ultra-high frequency (UHF), high-frequency current, or ultrasonic methods are commonly used for monitoring. Specifically, UHF or high-frequency sensors capture the electromagnetic wave signals generated by the discharge, ultrasonic sensors receive the acoustic wave signals, and a high-sampling-rate oscilloscope is used to simultaneously acquire and analyze these signals. By analyzing the time difference and phase relationship between different signals, a rough location of the partial discharge source can be achieved. This type of technical solution is typically applied to relatively concentrated power equipment such as GIS (Gas Insulated Switchgear), transformers, and switchgear.

[0004] However, existing partial discharge location technologies have many inherent defects and limitations in practical engineering applications, mainly in the following aspects: First, the system's connection method limits its application scope and performance. Current systems generally rely on wired connections to link sensors to oscilloscopes or data acquisition units. This method results in cumbersome on-site wiring, and signal attenuation and distortion are inevitable during long-distance cable transmission, making it difficult to ensure that all signal information is transmitted completely and accurately to the analysis terminal, thus affecting the reliability of subsequent analysis. Simultaneously, the limited number of physical ports on an oscilloscope also restricts the system's ability to simultaneously acquire and analyze signals from multiple monitoring points.

[0005] Secondly, existing technologies fall short in meeting the monitoring needs of large or distributed power equipment. For example, within a substation, transformers and GIS equipment are typically connected as a single unit, but they may be physically located in different equipment rooms or bays, often far apart. When the power source is located in such a connected area, traditional positioning systems, due to their limited monitoring range, struggle to achieve synchronous signal acquisition and joint analysis across regions, making it difficult to effectively identify the signal source. Similarly, for long-distance transmission lines or long cables under maintenance, due to their extreme span, existing systems cannot be deployed at both ends to achieve accurate time synchronization measurements, resulting in positioning failures or severely insufficient accuracy.

[0006] In summary, existing technologies are limited by their inherent connection methods, system architecture, and synchronization accuracy, resulting in significant shortcomings in achieving long-distance, high-precision, and multi-point partial discharge positioning. A new technical solution is urgently needed to address these issues. Summary of the Invention

[0007] The purpose of this invention is to provide an active compensation wireless partial discharge fault location method, system, device, equipment and medium, so as to at least solve or improve the problem of inaccurate location of partial discharge in the prior art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an active compensation-based wireless partial discharge fault location method, comprising: Obtain the first time difference T1 between the second sensor and the first sensor receiving the first test signal from the first position; Obtain the second time difference T2 between the second sensor and the first sensor receiving the second test signal from the second location; Obtain the distance X1 between the second position and the first position, and calculate the time error ΔT between the atomic clocks of the first sensor and the second sensor based on the first time difference T1, the second time difference T2, the distance X1, and the propagation speed v of the test signal in the power equipment. The third time difference T3 between the second sensor and the first sensor in receiving the partial discharge signal is obtained, and the distance X2 between the partial discharge location and the first sensor is calculated based on the third time difference T3, the first time difference T1, the time error ΔT, and the propagation speed v.

[0009] Furthermore, the step of obtaining the first time difference T1 includes: The first test signal is injected at the first position; Record the first time when the first sensor receives the first test signal, and the second time when the second sensor receives the first test signal; Calculate the difference between the first time and the second time, and use it as the first time difference T1.

[0010] Furthermore, the method also includes: The steps of injecting the first test signal and / or the second test signal are repeated at fixed time intervals Y to dynamically compensate for the time error ΔT in real time.

[0011] Furthermore, the first sensor and / or the second sensor are ultra-high frequency sensors or high frequency sensors.

[0012] Furthermore, the first sensor and the second sensor transmit the first time difference T1, the second time difference T2 and the third time difference T3 to the processing device via wireless communication.

[0013] In a second aspect, the present invention provides an active compensation wireless partial discharge fault location device, comprising: The first acquisition module is used to acquire a first time difference T1 between the second sensor and the first sensor receiving a first test signal from a first position; The second acquisition module is used to acquire a second time difference T2 between the second sensor and the second test signal received from the second position by the first sensor; The processing module is used to obtain the distance X1 between the second position and the first position, and calculate the time error ΔT between the atomic clocks of the first sensor and the second sensor based on the first time difference T1, the second time difference T2, the distance X1, and the propagation speed v of the test signal in the power equipment. The positioning module is used to obtain the third time difference T3 between the second sensor and the first sensor when the partial discharge signal is received, and to calculate the distance X2 between the partial discharge location and the first sensor based on the third time difference T3, the first time difference T1, the time error ΔT and the propagation speed v.

[0014] In a third aspect, the present invention provides an active compensation wireless partial discharge fault location system, comprising: Such as the positioning device described above; A pulse signal injection device is used to generate and inject the first test signal and / or the second test signal at the first position and / or the second position. The first sensor and the second sensor are configured to receive the test signal and the partial discharge signal, and are both connected to a chip atomic clock to assign a timestamp to the received signal.

[0015] Furthermore, the pulse signal injection device is a wired pulse injector or a wireless pulse injector.

[0016] In a fourth aspect, the present invention provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method described above.

[0017] In a fifth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method described above.

[0018] The active compensation wireless partial discharge fault location method of the present invention obtains the time difference T1 between the second sensor receiving the first test signal and the first sensor receiving the first test signal; obtains the time difference T2 between the second sensor receiving the second test signal and the first sensor receiving the second test signal; obtains the distance X1 between the second position and the first position; and obtains the time error ΔT between the atomic clocks of the two sensors based on the time difference T1 of the first test signal, the time difference T2 of the second test signal, the distance X1 between the second position and the first position, and the propagation speed v of the test signal in the power equipment; obtains the time difference T3 between the partial discharge signal of the second sensor and the first sensor; and calculates the distance X2 between the partial discharge position and the first position based on T3, T1, ΔT, and the propagation speed v of the test signal in the power equipment, where X2 is the distance between the partial discharge position and the first position. Therefore, the present invention solves the technical problem of insufficient accuracy in locating partial discharge positions in existing technologies. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a flowchart of an active compensation wireless partial discharge fault location method according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the sensor arrangement of the data acquisition device according to an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the calculation of partial discharge signals in an embodiment of the present invention; Figure 4 This is a schematic diagram of an active compensation wireless partial discharge fault location device according to an embodiment of the present invention. Figure 5This is a schematic diagram of an active compensation wireless partial discharge fault location system according to an embodiment of the present invention. Figure 6 This is a schematic diagram of a wired pulse injector according to an embodiment of the present invention; Figure 7 This is a schematic diagram of a wireless pulse injector according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the display interface of the control unit according to an embodiment of the present invention; Figure 9 This is a structural block diagram of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0021] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0022] Example 1 When equipment develops a locally non-uniform or highly non-uniform electric field due to factors such as insulation deterioration, poor construction techniques, or environmental aging, partial discharges that do not penetrate the insulation will occur at the points of non-uniformity. These partial discharges can cause irreversible damage to the insulation, eventually leading to insulation breakdown and short circuits. This prevents the equipment from transmitting electrical energy normally and affects the stable operation of the power system. To locate the partial discharge, this invention provides an active compensation wireless partial discharge fault location method.

[0023] Figure 1 This is a flowchart of an active compensation wireless partial discharge fault location method according to an embodiment of the present invention.

[0024] The active compensation wireless partial discharge fault location method of the present invention includes steps 100-400.

[0025] Step 100: Obtain the time difference T1 between the second sensor and the first sensor receiving the first test signal; Step 200: Obtain the time difference T2 between the second sensor receiving the second test signal and the first sensor receiving the second test signal; Step 300: Obtain the distance X1 between the second position and the first position. Based on the time difference T1 of the first test signal, the time difference T2 of the second test signal, the distance X1 between the second position and the first position, and the propagation speed v of the test signal in the power equipment, obtain the time error ΔT between the two sensor atomic clocks. ΔT = (T1 - T2) - 2 ; The time difference T3 between the partial discharge signals from the second sensor and the first sensor is obtained. Based on T3, T1, ΔT, and the speed v of the test signal transmission in the power equipment, the distance X2 between the partial discharge location and the first sensor is calculated. X2= .

[0026] Figure 2 This is a schematic diagram of the sensor arrangement of the data acquisition device according to an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the calculation of partial discharge signals in an embodiment of the present invention; Combination Figure 2 and Figure 3 This invention provides a detailed description of an active compensation-based wireless partial discharge fault location method.

[0027] Step 100: Obtain the time difference T1 between the second sensor and the first sensor receiving the first test signal.

[0028] Taking the example of a potential discharge location between two sensors, namely the first sensor (sensor 1) and the second sensor (sensor 2), as an example.

[0029] In one optional implementation, a first sensor is located at a first position, and a first test signal is injected at the first position; a first time when the first sensor receives the first test signal is obtained, and a second time when the second sensor receives the first test signal is obtained, and a first time difference T1 between the first time and the second time is calculated.

[0030] In other words, a first test signal is injected at the location of the first sensor.

[0031] The propagation speed v of the test signal in the power equipment is known. The test signal includes a first test signal and a second test signal, both of which propagate at the same speed v in the power equipment.

[0032] Since the transmission speed of the first test signal is v, and the first test signal needs to be transmitted on the power equipment (the device under test), the time it takes for the first test signal to reach the first position is relatively short, while the time it takes for the first side signal to reach the second position is relatively long. Therefore, there is a time interval between the first sensor and the second sensor receiving the first test signal, and this time interval is taken as the time difference T1. The distance between the first position and the second position is also known.

[0033] Step 200: Obtain the time difference T2 between the second sensor and the first sensor receiving the second test signal; please refer to [reference needed] for details. Figure 2 The second position is a distance X1 from the first sensor, where X1 is known. From... Figure 2 It can be seen that there is also a time interval between the first sensor and the second sensor receiving the second test signal. This time interval is taken as the time difference T2.

[0034] Step 300: Obtain the distance X1 between the second position and the first position, and obtain the time error ΔT between the two sensor atomic clocks based on the time difference T1 of the first test signal, the time difference T2 of the second test signal, the distance X1 between the second position and the first position, and the propagation speed v of the test signal in the power equipment.

[0035] The formula for ΔT: ΔT = (T1 - T2) - 2 Formula 1 The time error ΔT between the two sensor atomic clocks is generated after the atomic clocks have been running for a long time. This invention calculates the time error ΔT caused by the time drift due to the long-term operation of the two sensor atomic clocks, in order to prepare for the subsequent calculation of the partial discharge location. In this way, the distance X2 between the partial discharge location calculated in the subsequent step 400 and the first location is eliminated by the atomic clock error. Therefore, the partial discharge location calculated by the active compensation wireless partial discharge fault location method of this invention is more accurate than that of the prior art.

[0036] Specifically, due to Figure 2 The distance between the first and second sensors is fixed, and Formula 1 is derived.

[0037] Furthermore, to address the limitation of existing partial discharge systems, which are restricted by wired connections and cannot achieve long-distance, high-sampling-rate real-time detection, this invention employs, in some optional embodiments, a UHF and / or HF sensor as the first sensor and a UHF and / or HF sensor as the second sensor. Optionally, in embodiments of this invention, the first and second sensors transmit the time difference between the received first and second test signals to an oscilloscope via wired and / or wireless means.

[0038] Preferably, in this embodiment of the invention, the first sensor and the second sensor wirelessly transmit the time difference between the received first test signal and the time difference between the second test signal to the oscilloscope, which solves the technical defect of the prior art where the connection between the first sensor and the second sensor is cumbersome in the field by means of wired connection.

[0039] Step 400: Obtain the time difference T3 between the partial discharge signals of the second sensor and the first sensor. Based on T3, T1, ΔT and the speed v of the test signal transmission in the power equipment, calculate the distance X2 between the partial discharge location and the first location.

[0040] The formula for X2 is as follows: X2=

[0041] Please refer to Figure 3 The distance between the partial discharge location to be measured and the first location is X2. Using the time difference T1 of the first test signal (obtained in step 100) and the atomic clock time difference ΔT (obtained in step 300), the time difference T3 between the partial discharge signals from the first sensor and the second sensor is measured, thus determining the location of the active-compensated wireless partial discharge according to this embodiment of the invention. During the measurement process, this invention actively injects pulses (actively injecting the first test signal and / or the second test signal) at fixed time intervals Y (Y can be actively adjusted according to test needs, and this embodiment of the invention does not limit this) to achieve dynamic real-time compensation of ΔT. Therefore, step 400 of this invention can offset the dynamic time error caused by the atomic clock itself, allowing the atomic clock time difference measured by the active-compensated wireless partial discharge fault location method of this embodiment of the invention to be actively corrected. This makes the measured partial discharge location more accurate.

[0042] The active compensation wireless partial discharge fault location method of the present invention obtains the time difference T1 between the second sensor and the first sensor receiving the first test signal; obtains the time difference T2 between the second sensor and the first sensor receiving the second test signal; obtains the time error formula between the atomic clocks of the two sensors based on the time difference between the first and second test signals, obtains the distance X1 between the second position and the first position, and obtains the time error ΔT between the atomic clocks of the two sensors based on the time difference T1, the time difference T2, the distance X1 between the second and first positions, and the propagation speed v of the test signal in the power equipment; obtains the time difference T3 between the partial discharge signal of the second sensor and the first sensor, and calculates the distance X2 between the partial discharge position and the first sensor based on T3, T1, ΔT, and the propagation speed v of the test signal in the power equipment, where X2 is the distance between the partial discharge position and the first sensor. Therefore, the present invention solves the technical problem of insufficient accuracy in locating partial discharge positions in existing technologies.

[0043] The derivation process of the fault location method in this scheme is given below: The two sensors will generate an atomic clock time difference ΔT when they operate for a long time; The exact length of the cable is usually unknown; this solution assumes the cable length to be [length to be specified]. l This cable length l The distance between the first sensor and the second sensor; When the signal is injected for the first time upon power-on, it is assumed that there is no time difference between the two sensors; A first test signal is injected at the first sensor, and the time difference between the two sensors is obtained: T1 = t2 - t1, where t2 is the time when the second sensor receives the first test signal, and t1 is the time when the first sensor receives the first test signal. The cable length is also specified. l = T1×v, where v is the electromagnetic wave propagation speed.

[0044] After two sensors have been operating for a period of time, a time drift will occur, denoted as the atomic clock time difference ΔT. A second test signal is injected at a distance X1 from the first sensor, and the time difference between the two sensors is obtained, T2 = t4 - t3; t4 is the time when the second sensor receives the second test signal, and t3 is the time when the first sensor receives the second test signal. However, T2 at this point is not the actual time difference; the actual time difference should be T2. ， T2 ， = T2 + ΔT; then l =2×X1+ T2 ， ×v = 2×X1 + (T2 + ΔT)v; then T1×v = 2×X1 + (T2 + ΔT)v; then ; At this point, if a partial discharge occurs at a distance X2 from the first sensor, the time difference between the arrival of the partial discharge signal at the two sensors is T3; T1×v=2×X2+(T3+ΔT)v; then, .

[0045] Figure 4 This is a schematic diagram of the active compensation wireless partial discharge fault location device according to an embodiment of the present invention.

[0046] Reference Figure 4 The active compensation wireless partial discharge fault location device according to the embodiment includes: The first acquisition device is used to acquire the time difference T1 between the second sensor receiving the first test signal and the first sensor receiving the first test signal; The second acquisition device is used to acquire the time difference T2 between the second sensor receiving the second test signal and the first sensor receiving the second test signal. The processing device is used to obtain the distance X1 between the second position and the first position, and to obtain the time error ΔT between the two sensor atomic clocks based on the time difference T1 of the first test signal, the time difference T2 of the second test signal, the distance X1 between the second position and the first position, and the propagation speed v of the test signal in the power equipment. The positioning device is used to obtain the time difference T3 between the partial discharge signal of the second sensor and the partial discharge signal of the first sensor, and to calculate the distance X2 between the partial discharge position and the first position based on T3, T1, ΔT and the speed v of the test signal transmission in the power equipment.

[0047] Example 2 Figure 5 This is a schematic diagram of an active compensation wireless partial discharge fault location system according to an embodiment of the present invention.

[0048] like Figure 5 As shown, based on the same inventive concept as the above embodiments, the present invention also provides an active compensation wireless partial discharge fault location system, comprising: The data acquisition device is used to execute the active compensation wireless partial discharge fault location method in Embodiment 1. Specifically, it is used to execute steps 100-400 of Embodiment 1. Steps 100-400 have been described in detail in Embodiment 1 and will not be repeated here.

[0049] Reference Figure 5 The active compensation wireless partial discharge fault location system of the present invention includes: a signal conditioner, a high sampling rate acquisition unit, a chip atomic clock, a local memory, a signal transmission module, a remote controller, a receiving antenna, a transmitting antenna, and a power supply module.

[0050] Signal conditioner: Used to condition the signals collected by ultra-high frequency sensors and ultrasonic sensors, amplifying the signals to a suitable level and converting them into easily identifiable and easily acquired data.

[0051] High sampling rate acquisition unit: used to acquire signals returned by high frequency sensors, ultra-high frequency sensors, and ultrasonic sensors used for partial discharge detection, with a acquisition rate of 4 GsA / s.

[0052] Chip-based atomic clock: A chip-based atomic clock with a frequency stability better than 5-12 / s is preferred to meet the requirements for timing (time accuracy) of each acquired signal. Preferably, it features low power consumption, a wide operating temperature range, and small size. The chip-based atomic clock can output a 10MHz sine wave, and the number of sine waves is recorded by a waveform counter. Simultaneously, by comparing the number of sine waves counted by the counter with the signals acquired by the sensor, the sine waves are converted into time using the counter, enabling timing of the signals (the first test signal, the second test signal, and the partial discharge signal in Example 1). The technical solution of this invention relies on an atomic clock to achieve high-precision signal timing for the first test signal, the second test signal, and the partial discharge signal in Example 1.

[0053] Local memory: used to temporarily store the timing signals of the acquisition unit and counter (e.g., the first test signal, the second test signal, and the partial discharge signal in Example 1).

[0054] Signal transmission module: transmits the SSD data wirelessly to the central control panel via a wireless communication card.

[0055] Power module: Used to supply power to the data acquisition device.

[0056] A pulse signal injection device is used to generate test signals, which include: a first test signal, a second test signal, and a partial discharge signal as described in Embodiment 1. The pulse signal injection device includes a wired pulse injector and / or a wireless pulse injector. A wireless pulse injector is preferred. In an optional embodiment, a sensor is measured after pulse signal injection, including a high-frequency sensor and an ultra-high-frequency sensor.

[0057] Figure 6 This is a schematic diagram of a wired pulse injector according to an embodiment of the present invention.

[0058] Figure 7 This is a schematic diagram of a wireless pulse injector according to an embodiment of the present invention.

[0059] Reference Figure 5Wired pulse injector: This type of injector injects a pulse signal by bringing a high-voltage metal tip close to a conductive metal part, creating a discharge circuit between the tip and the metal. Wired pulse signal injector: It uses a 5V DC battery module as input voltage, which is then converted to a high-frequency voltage by an oscillator and a step-up transformer. One end of the output is connected to the tip, and the other end is connected to the device to which the signal is injected. The generated high-amplitude, high-frequency voltage causes the tip to pulse and discharge to the device, thus injecting the pulse signal. It can be used in situations with exposed metal equipment, such as bare wires or cable grounding braids.

[0060] Reference Figure 7 Wireless pulse injector: Utilizing the principle of electromagnetic induction, a cable or bare conductor is enclosed within a magnetic circuit. A pulsed current is applied to the primary coil of this closed magnetic circuit to generate a high-frequency magnetic field. This magnetic field is then induced into the cable or bare conductor, producing a pulsed current. This allows the pulsed current to be transmitted over long distances along the cable shield or the conductor itself. A 5V DC battery module serves as the input voltage, which is then converted to a high-frequency voltage by an oscillator and a step-up transformer. One output terminal is connected to a tip, and the other to the device to be injected. The generated high-amplitude, high-frequency voltage causes the tip to discharge, producing a pulsed discharge. This pulsed discharge generates a pulsed magnetic field through a magnetic circuit. Enclosing the device in the magnetic circuit allows for pulsed signal injection via electromagnetic induction. This method is suitable for applications without exposed metal components, such as cables.

[0061] The receiving and transmitting antennas are used to wirelessly receive test signals sent by the pulse signal injection device.

[0062] Figure 8 This is a schematic diagram of the display interface of the remote controller according to an embodiment of the present invention. Please refer to [link / reference]. Figure 8 The remote controller can remotely control the data acquisition device to perform data acquisition via event triggering, and can control the data acquisition time interval. It receives signals returned by the signal transmission module and can plot these signals onto a single waveform graph for comparison.

[0063] Example 3 like Figure 9 As shown, the present invention also provides an electronic device 100 for implementing an active compensation wireless partial discharge fault location method; the electronic device 100 includes a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and executable on at least one processor 102, and at least one communication bus 104.

[0064] The memory 101 can be used to store the computer program 103. The processor 102 implements the steps of the active compensation wireless partial discharge fault location method of Embodiment 1 by running or executing the computer program stored in the memory 101 and calling the data stored in the memory 101.

[0065] The memory 101 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created based on the use of the electronic device 100 (such as audio data), etc. In addition, the memory 101 may include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0066] At least one processor 102 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Processor 102 may be a microprocessor or any conventional processor. Processor 102 is the control center of electronic device 100, connecting various parts of electronic device 100 via various interfaces and lines.

[0067] The memory 101 in the electronic device 100 stores multiple instructions to implement an active compensation wireless partial discharge fault location method, and the processor 102 can execute multiple instructions to achieve the following: Obtain the time difference T1 between the second sensor and the first sensor receiving the first test signal; Obtain the time difference T2 between the second sensor receiving the second test signal and the first sensor receiving the second test signal; Obtain the distance X1 between the second position and the first position, and obtain the time error ΔT between the two sensor atomic clocks based on the time difference T1 of the first test signal, the time difference T2 of the second test signal, the distance X1 between the second position and the first position, and the propagation speed v of the test signal in the power equipment. The time difference T3 between the partial discharge signal of the second sensor and the partial discharge signal of the first sensor is obtained. Based on T3, T1, ΔT and the speed v of the test signal transmission in the power equipment, the distance X2 between the partial discharge location and the first sensor is calculated.

[0068] Example 4 If the modules / units integrated in the electronic device 100 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, and read-only memory (ROM).

[0069] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0070] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0071] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0072] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0073] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A method for active compensation-based wireless partial discharge fault location, characterized in that, include: Obtain the first time difference T1 between the second sensor and the first sensor receiving the first test signal from the first position; Obtain the second time difference T2 between the second sensor and the first sensor receiving the second test signal from the second position; Obtain the distance X1 between the second position and the first position, and calculate the time error ΔT between the atomic clocks of the first sensor and the second sensor based on the first time difference T1, the second time difference T2, the distance X1, and the propagation speed v of the test signal in the power equipment. The third time difference T3 between the second sensor and the first sensor in receiving the partial discharge signal is obtained, and the distance X2 between the partial discharge location and the first sensor is calculated based on the third time difference T3, the first time difference T1, the time error ΔT, and the propagation speed v.

2. The method according to claim 1, characterized in that, The step of obtaining the first time difference T1 includes: The first test signal is injected at the first position; Record the first time when the first sensor receives the first test signal, and the second time when the second sensor receives the first test signal; Calculate the difference between the first time and the second time, and use it as the first time difference T1.

3. The method according to claim 1, characterized in that, The method further includes: The steps of injecting the first test signal and / or the second test signal are repeated at fixed time intervals Y to dynamically compensate for the time error ΔT in real time.

4. The method according to claim 1, characterized in that, The first sensor and / or the second sensor are ultra-high frequency sensors or high frequency sensors.

5. The method according to claim 1, characterized in that, The first sensor and the second sensor transmit the first time difference T1, the second time difference T2 and the third time difference T3 to the processing device via wireless communication.

6. An active compensation wireless partial discharge fault location device, characterized in that, include: The first acquisition module is used to acquire a first time difference T1 between the second sensor and the first sensor receiving a first test signal from a first position; The second acquisition module is used to acquire a second time difference T2 between the second sensor and the second test signal received from the second position by the first sensor; The processing module is used to obtain the distance X1 between the second position and the first position, and calculate the time error ΔT between the atomic clocks of the first sensor and the second sensor based on the first time difference T1, the second time difference T2, the distance X1, and the propagation speed v of the test signal in the power equipment. The positioning module is used to obtain the third time difference T3 between the second sensor and the first sensor when the partial discharge signal is received, and to calculate the distance X2 between the partial discharge location and the first sensor based on the third time difference T3, the first time difference T1, the time error ΔT and the propagation speed v.

7. An active compensation wireless partial discharge fault location system, characterized in that, include: The positioning device as described in claim 6; A pulse signal injection device is used to generate and inject the first test signal and / or the second test signal at the first position and / or the second position. The first sensor and the second sensor are configured to receive the test signal and the partial discharge signal, and are both connected to a chip atomic clock to assign a timestamp to the received signal.

8. The system according to claim 7, characterized in that, The pulse signal injection device is a wired pulse injector or a wireless pulse injector.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method as described in any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 5.

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