Self-adaptive judgment method and device for partial discharge abnormal signal, medium and equipment

Abstract

The invention provides a self-adaptive judgment method and device for a partial discharge abnormal signal, a medium and equipment, and is applied to the technical field of partial discharge detection of high-voltage electrical equipment. Output signals of different measuring points on the circuit breaker are monitored. Firstly, whether an output signal of an A-phase moving side built-in measurement point is abnormal or not is judged; if the A-phase output is abnormal and the B-phase is consistent with the A-phase and the C-phase is not consistent, acquiring phase difference data between the A-phase and the B-phase, and if the phase difference data meet a preset standard, eliminating abnormal signals; on the contrary, if the C phase is consistent with the A phase and the B phase is not consistent, obtaining phase difference data between the A phase and the C phase, and if the preset standard is met, eliminating abnormal signals. And finally, if the outputs of the B phase, the C phase and the A phase are consistent, obtaining phase difference data among the three phases, and if a preset standard is met, eliminating abnormal signals. According to the method, interference signals can be effectively judged through phase difference analysis, so that adaptive judgment of abnormal signals is realized, and the reliability and accuracy of partial discharge monitoring are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of partial discharge detection of high-voltage electrical equipment, and in particular to a method, device, medium and equipment for adaptively judging abnormal partial discharge signals. Background Art

[0002] Partial discharge (PD) is a discharge phenomenon in a local area, which is often an early sign of aging or damage of electrical equipment insulation. Therefore, PD monitoring for high-voltage electrical equipment has gradually received attention. With the increasing intelligence of power grids, UHF PD detection technology has begun to be widely used. This technology aims to determine the corresponding defect type by monitoring the UHF abnormal signals generated during the partial discharge process and combining statistical spectrum analysis. This process can provide important information on the health status of the equipment, which helps to achieve early warning and maintenance decisions.

[0003] However, in the actual operation of electrical equipment, the complex electromagnetic environment makes partial discharge monitoring face many challenges. Factors such as corona of the outlet bushing and external electromagnetic interference (such as mobile phone signals, etc.) will affect the signals generated during the UHF monitoring process, resulting in an increase in the false alarm rate of the monitoring results. This electromagnetic interference not only increases the complexity of signal processing, but may also mask the real partial discharge signal, thereby reducing the reliability and accuracy of monitoring.

[0004] Therefore, how to effectively judge the interference signal that is mistakenly identified as an abnormal signal has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In view of the above problems, the present invention provides a method, device, medium and equipment for adaptively determining abnormal partial discharge signals that overcome the above problems or at least partially solve the above problems. The technical solution is as follows:

[0006] An adaptive judgment method for partial discharge abnormal signal, comprising:

[0007] Obtaining measurement signals outputted from different measurement points on a circuit breaker of a target electrical device, wherein the measurement points include a built-in measurement point on the moving side of phase A, a built-in measurement point on the moving side of phase B, and a built-in measurement point on the moving side of phase C of the circuit breaker;

[0008] Determine whether the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal;

[0009] In the case where the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output results of the built-in measurement point on the moving side of phase B are consistent with the output results of the built-in measurement point on the moving side of phase A, and the output results of the built-in measurement point on the moving side of phase C are inconsistent with the output results of the built-in measurement point on the moving side of phase A, then obtaining first phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase B, and if the first phase difference data satisfies a first preset phase residual standard condition, excluding the abnormal signal;

[0010] In the case where the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output result of the built-in measurement point on the moving side of phase C is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the built-in measurement point on the moving side of phase B is inconsistent with the output result of the built-in measurement point on the moving side of phase A, then obtain second phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase C, and if the second phase difference data satisfies a second preset phase residual standard condition, exclude the abnormal signal;

[0011] In the case where the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output results of the built-in measurement point on the moving side of phase B, the built-in measurement point on the moving side of phase C and the built-in measurement point on the moving side of phase A are consistent, then third phase difference data between the built-in measurement point on the moving side of phase A, the built-in measurement point on the moving side of phase B and the built-in measurement point on the moving side of phase C are obtained, and if the third phase difference data meets the third preset phase residual standard condition, the abnormal signal is excluded.

[0012] Optionally, the measuring point further includes an external measuring point arranged on the A-phase moving side of the circuit breaker, and the method further includes:

[0013] In the case where the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output result of the external measurement point on the moving side of phase A is consistent with the output result of the built-in measurement point on the moving side of phase A, fourth phase difference data between the built-in measurement point on the moving side of phase A and the external measurement point on the moving side of phase A is obtained, and when the fourth phase difference data meets the fourth preset phase residual standard condition and the abnormal signal is a specified signal type, the abnormal signal is excluded.

[0014] Optionally, the measurement points further include an external measurement point on the A-phase moving side of the circuit breaker and a background noise measurement point on the B-phase moving side, and the method further includes:

[0015] In the case that the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output result of the background noise measurement point on the moving side of phase B is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the external measurement point on the moving side of phase A is inconsistent with the output result of the built-in measurement point on the moving side of phase A, then the fifth phase difference data between the built-in measurement point on the moving side of phase A and the background noise measurement point on the moving side of phase B is obtained, and when the fifth phase difference data meets the fifth preset phase residual standard condition, the abnormal signal is excluded.

[0016] Optionally, the method further includes:

[0017] In the case that the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output results of the background noise measurement point on the moving side of phase B, the external measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase A are consistent, then the sixth phase difference data between the built-in measurement point on the moving side of phase A, the external measurement point on the moving side of phase A and the background noise measurement point on the moving side of phase B are obtained, and if the sixth phase difference data meets the sixth preset phase residual standard condition, the abnormal signal is excluded.

[0018] Optionally, the abnormal signal determination process includes:

[0019] Obtaining envelope characteristics of the measurement signal output by the measurement point;

[0020] Using the envelope feature, a standardized two-dimensional phase-amplitude spectrum of the measurement signal is obtained;

[0021] Based on the standardized two-dimensional phase-amplitude spectrum, it is identified whether the measurement signal is the abnormal signal.

[0022] Optionally, the process of obtaining the phase difference data includes:

[0023] For any of the measuring points: using the standardized two-dimensional phase-amplitude spectrum of the measuring signal outputted from the measuring point, obtaining a phase distribution feature corresponding to the measuring point;

[0024] The phase difference data between the measurement points are obtained by utilizing the phase distribution characteristics corresponding to the measurement points having consistent output results.

[0025] Optionally, the using the standardized two-dimensional phase-amplitude spectrum of the measurement signal outputted from the measurement point to obtain the phase distribution feature corresponding to the measurement point includes:

[0026] Clustering the standardized two-dimensional phase-amplitude spectrum of the measurement signal outputted from the measurement point based on a preset clustering threshold to obtain a first clustering result and a characteristic number;

[0027] Clustering the standardized two-dimensional phase-amplitude spectrum based on the first clustering result and the characteristic number to obtain a second clustering result;

[0028] Based on the first clustering result and the second clustering result, obtaining a composite clustering feature of the standardized two-dimensional phase-amplitude spectrum;

[0029] Utilizing the composite clustering feature, calculating the centroid of the effective clustering interval of the standardized two-dimensional phase-amplitude spectrum;

[0030] The phase distribution range of the centroid is calculated according to a preset sampling frequency to obtain the phase distribution characteristics corresponding to the measurement point.

[0031] An adaptive judgment device for partial discharge abnormal signal includes: a measurement signal acquisition unit, an abnormal signal judgment unit and an abnormal signal judgment unit.

[0032] The measurement signal obtaining unit is used to obtain measurement signals outputted by different measurement points on the circuit breaker of the target electrical device, wherein the measurement points include a built-in measurement point on the moving side of phase A, a built-in measurement point on the moving side of phase B, and a built-in measurement point on the moving side of phase C of the circuit breaker;

[0033] The abnormal signal determination unit is used to determine whether the measurement signal output by the built-in measurement point on the A-phase moving side is an abnormal signal;

[0034] The abnormal signal judgment unit is used for obtaining first phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase B if the output result of the built-in measurement point on the moving side of phase B is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the built-in measurement point on the moving side of phase C is inconsistent with the output result of the built-in measurement point on the moving side of phase A, and excluding the abnormal signal if the first phase difference data satisfies a first preset phase residual standard condition;

[0035] The abnormal signal judgment unit is used for obtaining second phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase C if the output result of the built-in measurement point on the moving side of phase C is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the built-in measurement point on the moving side of phase B is inconsistent with the output result of the built-in measurement point on the moving side of phase A, and excluding the abnormal signal if the second phase difference data meets a second preset phase residual standard condition;

[0036] The abnormal signal judgment unit is used to obtain third phase difference data between the built-in measurement point on the moving side of phase A, the built-in measurement point on the moving side of phase B, and the built-in measurement point on the moving side of phase C, if the output results of the built-in measurement point on the moving side of phase B, the built-in measurement point on the moving side of phase C are consistent, and exclude the abnormal signal if the third phase difference data meets a third preset phase residual standard condition.

[0037] A computer-readable storage medium stores a program, and when the program is executed by a processor, the adaptive judgment method of partial discharge abnormal signal is realized.

[0038] An electronic device comprises at least one processor, at least one memory connected to the processor, and a bus; wherein the processor and the memory communicate with each other via the bus; the processor is used to call program instructions in the memory to execute the adaptive judgment method of partial discharge abnormality signal.

[0039] By means of the above technical scheme, the present invention provides an adaptive judgment method, device, medium and equipment for partial discharge abnormal signal. The present invention monitors and analyzes the output signals of different measuring points on the circuit breaker. First, it determines whether the output signal of the built-in measuring point on the moving side of phase A is abnormal. In the case where the output of phase A is an abnormal signal, if the output of phase B is consistent with the output of phase A and the output of phase C is inconsistent, the first phase difference data between phase A and phase B is obtained, and the abnormal signal is excluded if the first preset phase residual standard is met. Similarly, if phase C is consistent with phase A and phase B is inconsistent, the second phase difference data between phase A and phase C is obtained, and the abnormal signal is excluded if the second preset standard is met. Finally, if the output results of phase B, phase C and phase A are consistent, the third phase difference data between the three is obtained, and the abnormal signal is also excluded if the third preset standard is met. The present invention can effectively determine the interference signal of the wrong identification by analyzing the phase difference of the output signals of different measuring points of the circuit breaker, thereby realizing the adaptive analysis and judgment of the abnormal signal, thereby improving the reliability and accuracy of partial discharge monitoring.

[0040] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0042] Figure 1 A schematic flow chart showing an implementation of a method for adaptively determining a partial discharge abnormal signal provided by an embodiment of the present invention;

[0043] Figure 2 A schematic diagram showing a standardized two-dimensional phase-amplitude spectrum of an abnormal signal provided by an embodiment of the present invention;

[0044] Figure 3 A schematic diagram showing a phase distribution feature of a standardized two-dimensional phase-amplitude spectrum provided by an embodiment of the present invention;

[0045] Figure 4 A schematic diagram showing an arrangement of measurement points provided by an embodiment of the present invention is shown;

[0046] Figure 5 A logic block diagram of the decision logic of the adaptive decision provided by the embodiment of the present invention is shown;

[0047] Figure 6 A schematic diagram showing the structure of an adaptive determination device for partial discharge abnormality signal provided by an embodiment of the present invention is shown;

[0048] Figure 7 A schematic structural diagram of an electronic device provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0049] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0050] With the rapid development and construction of modern power systems, gas-insulated high-voltage electrical equipment (such as gas-insulated switchgear GIS and gas-insulated lines GIL) has been widely used due to its superior electrical performance and spatial adaptability. The operating status of these devices is directly related to the power supply reliability of the power system. Therefore, it is particularly important to ensure its stability under various working conditions. The internal structure of high-voltage electrical equipment is complex, and there may be problems such as foreign matter, poor contact of components, and defects in insulating materials. These factors will destroy the uniformity of the electric field inside the equipment, reduce the starting voltage of partial discharge, and thus cause partial discharge.

[0051] Partial discharge (PD) is an early sign of insulation aging or damage in electrical equipment, so its monitoring has gradually received attention. With the improvement of power grid intelligence, UHF PD detection technology has been widely used. By monitoring the UHF abnormal signals generated by PD and performing statistical spectrum analysis, the type of equipment defects can be determined, and then the equipment health status information can be provided to assist in early warning and maintenance decision-making. However, complex electromagnetic environments (such as corona of the outlet bushing and external interference) affect the monitoring signals, resulting in an increase in the false alarm rate, increasing the complexity of signal processing, and may mask the real PD signal, thereby reducing the reliability and accuracy of monitoring.

[0052] In order to deal with these electromagnetic interferences, the interference signal processing technology is currently mainly used for suppression, or hardware filtering is performed at the front end of the signal acquisition. Although these technologies have improved the monitoring effect to a certain extent, due to the correlation between the interference signal and the partial discharge signal in the power frequency phase, and its similarity with the typical defect spectrum, the existing interference signal suppression means are still difficult to effectively judge and suppress such signals. Therefore, it is urgent to develop an interference signal judgment technology with low computational complexity and strong practicality, which can effectively judge the interference signal with phase correlation and correspondence with the typical defect spectrum in the presence of typical radar interference, mobile phone interference, etc., so as to improve the reliability and accuracy of partial discharge monitoring and provide a solid theoretical basis for the detection, judgment and processing of abnormal signals.

[0053] Based on this, in an embodiment of the present invention, an adaptive judgment method for partial discharge abnormal signals is provided. First, the output signals of different measurement points on the target electrical equipment circuit breaker are obtained, and these measurement points include built-in measurement points set on the moving side of phase A, phase B and phase C. Secondly, it is determined whether the output signal of the built-in measurement point on the moving side of phase A is an abnormal signal. If the output of phase A is abnormal, and the output of phase B is consistent with phase A and the output of phase C is inconsistent, the first phase difference data between phase A and phase B is obtained; if the data meets the first preset phase residual standard, the abnormal signal can be excluded. Similarly, if the output of phase C is consistent with phase A and the output of phase B is inconsistent, the second phase difference data between phase A and phase C is obtained; if the second preset standard is met, the abnormal signal is excluded. In addition, if the output results of phase B, phase C and phase A are consistent, the third phase difference data between the three is obtained, and if it meets the third preset standard, the abnormal signal is also excluded. By analyzing the phase difference of the output signals of different measurement points, the present invention can effectively identify erroneous interference signals, realize adaptive analysis and judgment of abnormal signals, and thus improve the reliability and accuracy of partial discharge monitoring.

[0054] like Figure 1 As shown, a flow chart of an implementation of a method for adaptively determining a partial discharge abnormal signal provided by an embodiment of the present invention is provided. The method may include:

[0055] S100, obtaining measurement signals outputted from different measurement points on a circuit breaker of a target electrical device, wherein the measurement points include a built-in measurement point on the moving side of phase A, a built-in measurement point on the moving side of phase B, and a built-in measurement point on the moving side of phase C of the circuit breaker.

[0056] The target electrical equipment may be gas-insulated high-voltage electrical equipment, such as gas-insulated switchgear (GIS) and gas-insulated transmission line (GIL).

[0057] Among them, a circuit breaker is a device used for automatic switching in power systems. Its main function is to quickly cut off the current when a circuit fault occurs (such as short circuit or overload) to protect the safety of equipment and circuits.

[0058] The measurement point refers to a location set in an electrical device for monitoring and measuring electrical parameters such as current and voltage.

[0059] Among them, the moving side refers to the part of the circuit breaker that is in the active or operating state. The built-in measurement point on the moving side of phase A refers to the measurement point set inside the side of the circuit breaker phase A that participates in the circuit breaker action (open or close). The built-in measurement point on the moving side of phase B refers to the measurement point set inside the side of the circuit breaker phase B that participates in the circuit breaker action. The built-in measurement point on the moving side of phase C refers to the measurement point set inside the side of the circuit breaker phase C that participates in the circuit breaker action.

[0060] The measurement signals are ultra-high frequency signals collected by a measurement device or sensor disposed at a measurement point, and these signals are usually in the form of current or voltage.

[0061] S110, determining whether the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal.

[0062] Specifically, the embodiment of the present invention can perform signal preprocessing including denoising and normalization on the measurement signal output by the built-in measurement point on the moving side of phase A, and then extract phase amplitude features and time frequency features from the two-dimensional phase-amplitude spectrum of the measurement signal, and input these features into a pre-trained model for classification to determine whether the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal.

[0063] The abnormal signal provided in the embodiment of the present invention refers to a signal that can reflect the cause of partial discharge phenomenon in electrical equipment. Optionally, the signal types of the abnormal signal may include: insulation defects, metal particles, floating potential and tip corona.

[0064] S120. When the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output results of the built-in measurement point on the moving side of phase B are consistent with those of the built-in measurement point on the moving side of phase A, and the output results of the built-in measurement point on the moving side of phase C are inconsistent with those of the built-in measurement point on the moving side of phase A, then obtain first phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase B. If the first phase difference data meets the first preset phase residual standard condition, eliminate the abnormal signal.

[0065] The phase difference data refers to the phase difference between the measurement signals output from two measurement points, reflecting the relative change of the two measurement signals over time, i.e., phase correlation. The phase difference data is the absolute difference between the phase distribution characteristics of the two measurement signals.

[0066] Among them, the first preset phase residual standard condition can be that the first phase difference data is less than the first preset phase residual standard threshold. It can be understood that the specific value of the first preset phase residual standard threshold can be set according to the actual accuracy requirement. Optionally, the embodiment of the present invention can provide a corresponding first preset phase residual standard threshold for each signal type of abnormal signal.

[0067] Normally, the signals between the three phases (A, B, C) of the circuit breaker in the power system should be correlated. If phase A outputs an abnormal signal, and the output results of phase B and phase A are consistent, while the measurement result of phase C is inconsistent with phase A, the phase difference data between phase A and phase B can be calculated to determine the relative position of the two signals in time. If the phase difference meets the preset phase residual standard condition, it means that the change trends of the two signals are consistent, and the abnormal signal generated by phase A may be caused by temporary interference, rather than a real partial discharge fault.

[0068] In the embodiment of the present invention, when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the measurement signal output by the built-in measurement point on the moving side of phase B is also an abnormal signal, and the signal type of the abnormal signal is consistent with the signal type of the abnormal signal output by the built-in measurement point on the moving side of phase A, then it is confirmed that the output results of the built-in measurement point on the moving side of phase B are consistent with the output results of the built-in measurement point on the moving side of phase A. Similarly, if the measurement signal output by the built-in measurement point on the moving side of phase C is a non-abnormal signal or the signal type is inconsistent with the signal type of the abnormal signal output by the built-in measurement point on the moving side of phase A, then it is confirmed that the output results of the built-in measurement point on the moving side of phase C are inconsistent with the output results of the built-in measurement point on the moving side of phase A.

[0069] S130. When the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output results of the built-in measurement point on the moving side of phase C are consistent with those of the built-in measurement point on the moving side of phase A, and the output results of the built-in measurement point on the moving side of phase B are inconsistent with those of the built-in measurement point on the moving side of phase A, then obtain second phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase C. If the second phase difference data meets the second preset phase residual standard condition, eliminate the abnormal signal.

[0070] Among them, the second preset phase residual standard condition can be that the second phase difference data is less than the second preset phase residual standard threshold. It can be understood that the specific value of the second preset phase residual standard threshold can be set according to the actual accuracy requirement. Optionally, the embodiment of the present invention can provide a corresponding second preset phase residual standard threshold for each signal type of abnormal signal.

[0071] If phase A outputs an abnormal signal, and the output results of phase C and phase A are consistent, while the measurement result of phase B is inconsistent with phase A, the relative position of the two signals in time can be determined by calculating the phase difference data between phase A and phase C. If the phase difference meets the preset phase residual standard condition, it means that the change trends of the two signals are consistent, and the abnormal signal generated by phase A may be caused by temporary interference, rather than a real partial discharge fault.

[0072] In the embodiment of the present invention, when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the measurement signal output by the built-in measurement point on the moving side of phase C is also an abnormal signal, and the signal type of the abnormal signal is consistent with the signal type of the abnormal signal output by the built-in measurement point on the moving side of phase A, then it is confirmed that the output results of the built-in measurement point on the moving side of phase C are consistent with those of the built-in measurement point on the moving side of phase A. Similarly, if the measurement signal output by the built-in measurement point on the moving side of phase B is a non-abnormal signal or the signal type is inconsistent with the signal type of the abnormal signal output by the built-in measurement point on the moving side of phase A, then it is confirmed that the output results of the built-in measurement point on the moving side of phase B are inconsistent with those of the built-in measurement point on the moving side of phase A.

[0073] S140. When the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output results of the built-in measurement point on the moving side of phase B, the built-in measurement point on the moving side of phase C and the built-in measurement point on the moving side of phase A are consistent, then the third phase difference data among the built-in measurement point on the moving side of phase A, the built-in measurement point on the moving side of phase B and the built-in measurement point on the moving side of phase C are obtained. If the third phase difference data meets the third preset phase residual standard condition, the abnormal signal is eliminated.

[0074] Among them, the third preset phase residual standard condition can be that the first phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase B is less than the third preset phase residual standard threshold, and the second phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase C is also less than the third preset phase residual standard threshold. It can be understood that the specific value of the third preset phase residual standard threshold can be set according to the actual accuracy requirements. Optionally, the embodiment of the present invention can provide a corresponding third preset phase residual standard threshold for each type of abnormal signal.

[0075] If phase A outputs an abnormal signal, and phases B and C are consistent with the output results of phase A, calculate the phase difference data between phase A and phases B and C respectively. If the phase difference meets the preset phase residual standard conditions, it means that the change trends of the three signals are consistent. The abnormal signal generated by phase A may be caused by temporary interference rather than a real partial discharge fault.

[0076] The present invention provides an adaptive judgment method for partial discharge abnormal signals, the method comprising: monitoring and analyzing the output signals of different measuring points on the circuit breaker, first, determining whether the output signal of the built-in measuring point on the moving side of phase A is abnormal. In the case where the output of phase A is an abnormal signal, if the output of phase B is consistent with the output of phase A and the output of phase C is inconsistent, the first phase difference data between phase A and phase B is obtained, and if the first preset phase residual standard is met, the abnormal signal is excluded. Similarly, if phase C is consistent with phase A and phase B is inconsistent, the second phase difference data between phase A and phase C is obtained, and if the second preset standard is met, the abnormal signal is excluded. Finally, if the output results of phase B, phase C and phase A are consistent, the third phase difference data between the three is obtained, and if the third preset standard is met, the abnormal signal is also excluded. The present invention can effectively determine the interference signal of the wrong identification by analyzing the phase difference of the output signals of different measuring points of the circuit breaker, thereby realizing the adaptive analysis and judgment of the abnormal signal, and then improving the reliability and accuracy of partial discharge monitoring.

[0077] Optional, in the above Figure 1 On the basis of one or more corresponding embodiments, in another optional embodiment provided by the embodiment of the present invention, the measuring point further includes an external measuring point set on the A-phase moving side of the circuit breaker, and the method may further include:

[0078] When the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output result of the external measurement point on the moving side of phase A is consistent with the output result of the built-in measurement point on the moving side of phase A, then the fourth phase difference data between the built-in measurement point on the moving side of phase A and the external measurement point on the moving side of phase A is obtained, and when the fourth phase difference data meets the fourth preset phase residual standard condition and the abnormal signal is a specified signal type, the abnormal signal is excluded.

[0079] The A-phase moving side external measuring point refers to a measuring point arranged outside the side of the A-phase circuit breaker that participates in the circuit breaker operation.

[0080] Among them, the fourth preset phase residual standard condition can be that the fourth phase difference data is less than the fourth preset phase residual standard threshold. It can be understood that the specific value of the fourth preset phase residual standard threshold can be set according to the actual accuracy requirement. Optionally, the embodiment of the present invention can provide a corresponding fourth preset phase residual standard threshold for each abnormal signal of the specified signal type.

[0081] Optionally, the specified signal type can be metal particles and suspension potential.

[0082] In the power system, the built-in measurement points and the external measurement points should generally reflect similar electrical characteristics and operating conditions. By calculating the phase difference data between the built-in measurement point and the external measurement point on the moving side of phase A, the relative position of the two signals in time can be determined. If the phase difference meets the preset phase residual standard condition, it means that the change trends of the two signals are consistent, and the abnormal signal generated by the built-in measurement point on the moving side of phase A may be caused by temporary interference, rather than a real partial discharge fault.

[0083] In an embodiment of the present invention, when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the measurement signal output by the external measurement point on the moving side of phase A is also an abnormal signal, and the signal type of the abnormal signal is consistent with the signal type of the abnormal signal output by the built-in measurement point on the moving side of phase A, then it is confirmed that the output results of the external measurement point on the moving side of phase A are consistent with the output results of the built-in measurement point on the moving side of phase A.

[0084] In the embodiment of the present invention, when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output results of the external measurement point on the moving side of phase A are consistent with those of the built-in measurement point, it means that the signal provided by the external measurement point can be used as a reliable basis, so that the phase relationship can be analyzed by calculating the phase difference data between the two. When the phase difference meets the preset phase residual standard condition and the abnormal signal is of a specific type, it means that the abnormal signal generated by phase A may be caused by temporary interference, rather than a real partial discharge fault. This process effectively determines the misidentified interference signal, realizes the adaptive analysis and judgment of the abnormal signal, thereby improving the reliability and accuracy of partial discharge monitoring and ensuring the safe and stable operation of the power system.

[0085] Optional, in the above Figure 1 On the basis of one or more corresponding embodiments, in another optional embodiment provided by the embodiment of the present invention, the measurement point further includes an external measurement point on the moving side of phase A of the circuit breaker and a background noise measurement point on the moving side of phase B, and the method may further include:

[0086] When the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output result of the background noise measurement point on the moving side of phase B is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the external measurement point on the moving side of phase A is inconsistent with the output result of the built-in measurement point on the moving side of phase A, then the fifth phase difference data between the built-in measurement point on the moving side of phase A and the background noise measurement point on the moving side of phase B is obtained, and when the fifth phase difference data meets the fifth preset phase residual standard condition, the abnormal signal is eliminated.

[0087] The B-phase moving side background noise measurement point refers to a measurement point set on the side of the circuit breaker B phase participating in the circuit breaker operation and used to collect background environmental noise.

[0088] Among them, the fifth preset phase residual standard condition can be that the fifth phase difference data is less than the fifth preset phase residual standard threshold. It can be understood that the specific value of the fifth preset phase residual standard threshold can be set according to the actual accuracy requirement. Optionally, the embodiment of the present invention can provide a corresponding fifth preset phase residual standard threshold for each signal type of abnormal signal.

[0089] In the embodiment of the present invention, when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output result of the background noise measurement point on the moving side of phase B is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the external measurement point on the moving side of phase A is inconsistent with the output result of the built-in measurement point, it means that the abnormal signal of the built-in measurement point may be interfered by the background noise. At this time, by obtaining the fifth phase difference data between the built-in measurement point on the moving side of phase A and the background noise measurement point on the moving side of phase B, and verifying whether the phase difference data meets the preset fifth phase residual standard, the nature of the abnormal signal can be further confirmed. If the conditions are met, the abnormal signal can be excluded. This process effectively determines the misidentified interference signal, realizes the adaptive analysis and judgment of the abnormal signal, and thus improves the reliability and accuracy of partial discharge monitoring, ensuring the normal operation of the power equipment.

[0090] Optionally, in an embodiment of the present invention, when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output results of the background noise measurement point on the moving side of phase B, the external measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase A are consistent, then the sixth phase difference data between the built-in measurement point on the moving side of phase A, the external measurement point on the moving side of phase A and the background noise measurement point on the moving side of phase B are obtained, and if the sixth phase difference data meets the sixth preset phase residual standard condition, the abnormal signal is excluded.

[0091] Among them, the sixth preset phase residual standard condition can be that the fourth phase difference data between the built-in measurement point on the moving side of phase A and the external measurement point on the moving side of phase A is less than the sixth preset phase residual standard threshold, and the fifth phase difference data between the background noise measurement point on the moving side of phase B and the built-in measurement point on the moving side of phase A is also less than the sixth preset phase residual standard threshold. It can be understood that the specific value of the sixth preset phase residual standard threshold can be set according to the actual accuracy requirements. Optionally, the embodiment of the present invention can provide a corresponding sixth preset phase residual standard threshold for abnormal signals of each signal type.

[0092] In the embodiment of the present invention, when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output results of the background noise measurement point on the moving side of phase B, the external measurement point on the moving side of phase A are consistent with the built-in measurement point on the moving side of phase A, it means that the signal characteristics of all measurement points are consistent, which may indicate that the abnormal signal is interfered with or misidentified. At this time, by calculating the sixth phase difference data between the built-in measurement point on the moving side of phase A, the external measurement point on the moving side of phase A, and the background noise measurement point on the moving side of phase B, and judging whether the phase difference data meets the preset sixth phase residual standard, the authenticity of the signal can be effectively confirmed. If the sixth phase difference data meets the standard, the abnormal signal of the built-in measurement point on the moving side of phase A can be excluded. This process effectively determines the misidentified interference signal, realizes the adaptive analysis and judgment of the abnormal signal, and thus improves the local release.

[0093] Optionally, the various preset phase residual standard thresholds provided in the embodiment of the present invention may be the same or different. For example, the first preset phase residual standard threshold and the second preset phase residual standard threshold may both be 10, the third preset phase residual standard threshold may be 8, the fourth preset phase residual standard threshold may be 7, the fifth preset phase residual standard threshold and the sixth preset phase residual standard threshold may both be 9.

[0094] Optional, in the above Figure 1 On the basis of one or more corresponding embodiments, in another optional embodiment provided by the embodiment of the present invention, the abnormal signal determination process may include:

[0095] The envelope characteristics of the measurement signal outputted from the measurement point are obtained; a standardized two-dimensional phase-amplitude spectrum of the measurement signal is obtained using the envelope characteristics; and based on the standardized two-dimensional phase-amplitude spectrum, whether the measurement signal is an abnormal signal is identified.

[0096] Among them, the envelope feature refers to the extraction of the main change trend and morphological characteristics of the signal by analyzing the measurement signal.

[0097] Specifically, the embodiment of the present invention can perform a Hilbert transform on the measurement signal output by the measurement point to obtain a solution, for example:

[0098]

[0099] in, Indicates the measurement signal output by the measurement point; , indicating three phases; , indicating built-in sensors and external sensors; Express The result after Hilbert transform; represents a virtual signal time delay; Represents the time series of the acquired signal; Represents a constant factor used to normalize the transformation result.

[0100] Specifically, the embodiment of the present invention can solve the envelope characteristics of the measurement signal based on the measurement signal before and after the Hilbert transform, for example:

[0101]

[0102] in, Represents the envelope characteristics of the measurement signal; represents the measured signal before Hilbert transform, represents the measured signal after Hilbert transformation.

[0103] Among them, the standardized two-dimensional phase-amplitude spectrum is an analysis tool that presents the phase information and amplitude information of the measured signal in a graphical form. In the two-dimensional phase-amplitude spectrum, the horizontal axis represents the phase and the vertical axis represents the amplitude.

[0104] Specifically, the embodiment of the present invention can construct a two-dimensional phase-amplitude spectrum for the measurement signal based on a preset accumulation time, for example:

[0105]

[0106] in, A two-dimensional phase-amplitude spectrum representing the measured signal; Indicates the sampling frequency; Indicates the preset cumulative time; Indicates amplitude.

[0107] Next, based on the envelope characteristics of the measurement signal, the spectrum peak of the measurement signal is searched in the two-dimensional phase-amplitude spectrum, for example:

[0108]

[0109] in, Indicates the peak value of the spectrum; Represents the envelope feature.

[0110] Finally, the two-dimensional phase-amplitude spectrum is normalized based on the spectrum peak to obtain a standardized two-dimensional phase-amplitude spectrum, for example:

[0111]

[0112] in, A normalized two-dimensional phase-amplitude spectrum representing the measured signal; Indicates the peak value of the spectrum; Represents the two-dimensional phase-amplitude spectrum of the measured signal.

[0113] Specifically, the embodiment of the present invention can pre-set the amplitude and phase thresholds of the normal signal or use a machine learning model for training. By comparing the standardized two-dimensional phase-amplitude spectrum of the new measurement signal with the spectrum data of the normal signal, if a feature that obviously deviates from the normal range is found, the measurement signal can be judged as an abnormal signal.

[0114] By obtaining the envelope characteristics of the measurement signal output by the measurement point, the embodiment of the present invention can effectively extract the key information of the signal and reflect its changing trend and strength. The standardized two-dimensional phase-amplitude spectrum constructed using these envelope characteristics not only provides an intuitive visualization tool for signal analysis, but also facilitates the systematic comparison and evaluation of signal characteristics. The identification of abnormal signals based on this spectrum can provide reliable original signal support for the subsequent elimination of interference signals, thereby improving the efficiency of adaptive analysis and judgment of abnormal signals.

[0115] Optionally, the process of obtaining the phase difference data provided by the embodiment of the present invention may include: for any measurement point: using the standardized two-dimensional phase-amplitude spectrum of the measurement signal output by the measurement point to obtain the phase distribution characteristics corresponding to the measurement point. Using the phase distribution characteristics corresponding to each measurement point with consistent output results, the phase difference data between each measurement point is obtained.

[0116] Figure 2 The figure shows a schematic diagram of a standardized two-dimensional phase-amplitude spectrum of an abnormal signal. The embodiment of the present invention can perform two clusterings on the standardized two-dimensional phase-amplitude spectrum of the abnormal signal using a clustering method based on DBSCAN (density clustering algorithm) and K-Means (partitioning clustering algorithm), and utilizes DBSCAN's ability to process noise and find clusters of arbitrary shapes, as well as K-Means's high efficiency in processing large-scale data, thereby improving the accuracy and robustness of clustering analysis. Then, the centroid of the composite clustering feature is solved by combining the results of the two clusterings, and then the phase distribution characteristics of the centroid are calculated in combination with the sampling frequency. Figure 3 The figure shows a schematic diagram of a phase distribution feature of a standardized two-dimensional phase-amplitude spectrum. Finally, the absolute difference of the phase distribution feature between any two measurement points with consistent output results is calculated to obtain the phase difference data between the two measurement points.

[0117] The embodiment of the present invention can extract the phase distribution characteristics of any measurement point by analyzing the standardized two-dimensional phase-amplitude spectrum of any measurement point. These phase distribution characteristics are compared between multiple measurement points with consistent output results, and the phase difference data between each measurement point can be effectively calculated, thereby facilitating the identification and determination of potential misidentification and interference signals, and further realizing adaptive analysis and determination of abnormal signals.

[0118] Optionally, an embodiment of the present invention can cluster the standardized two-dimensional phase-amplitude spectrum of the measurement signal output by the measurement point based on a preset clustering threshold to obtain a first clustering result and a characteristic number; cluster the standardized two-dimensional phase-amplitude spectrum based on the first clustering result and the characteristic number to obtain a second clustering result; obtain a composite clustering feature of the standardized two-dimensional phase-amplitude spectrum based on the first clustering result and the second clustering result; calculate the centroid of the effective clustering interval of the standardized two-dimensional phase-amplitude spectrum using the composite clustering feature; calculate the phase distribution range of the centroid according to the preset sampling frequency to obtain the phase distribution feature corresponding to the measurement point.

[0119] Specifically, the embodiment of the present invention can count all data points in the standardized two-dimensional phase-amplitude spectrum of the measurement signal output by the measurement point that are greater than the preset environmental threshold, and then use a clustering method based on DBSCAN (density clustering algorithm) and K-Means (partitioning clustering algorithm) to cluster these data points according to the preset clustering threshold to obtain a first clustering result and feature number, for example:

[0120]

[0121] in, is the first clustering result; The abscissa matrix representing the normalized two-dimensional phase-amplitude spectrum; Any value representing the ordinate matrix of the normalized two-dimensional phase-amplitude spectrum; is the normalized two-dimensional phase-amplitude spectrum; is the preset clustering threshold.

[0122] Specifically, the embodiment of the present invention takes each cluster in the first clustering result as an object based on the number of features obtained by the first clustering, and then takes each object as a cluster center, calculates the distance between each object and each cluster center, and assigns each object to the cluster center closest to it, to obtain a second clustering result, for example:

[0123]

[0124] in, is the second clustering result; The abscissa matrix representing the normalized two-dimensional phase-amplitude spectrum; is the characteristic number; Indicates the serial number is The centroid of the cluster, i.e. the cluster center; Indicates the serial number is The horizontal coordinate matrix of .

[0125] Specifically, the embodiment of the present invention may perform a product operation on the first clustering result and the second clustering result to obtain a composite clustering feature of a standardized two-dimensional phase-amplitude spectrum, for example:

[0126]

[0127] in, is a composite clustering feature; is the first clustering result; This is the second clustering result.

[0128] Specifically, the embodiment of the present invention can calculate and solve the centroid within the effective clustering interval according to the composite clustering characteristics by using the sampling points of the phase (x-axis) and amplitude (y-axis) of the spectrum, for example:

[0129]

[0130] in, is the centroid. When there is a feature in the graph, the calculation result of the centroid is , when there are two features in the graph, the calculation result of the centroid is ; The serial number on the x-axis is The sampling point corresponding to the phase of The serial number on the y-axis is The sampling point corresponding to the amplitude of .

[0131] Specifically, the embodiment of the present invention can input the centroid of the valid clustering interval of the standardized two-dimensional phase-amplitude spectrum into the following formula:

[0132]

[0133] The phase distribution range of the centroid is calculated to obtain the phase distribution characteristics of the standardized two-dimensional phase-amplitude spectrum, where: is the phase distribution characteristic; is the preset sampling frequency; is the center of mass.

[0134] It can be understood that in the case of calculation of the phase distribution range of the centroid of the standardized two-dimensional phase-amplitude spectrum involving the background noise measurement point, the calculation formula is:

[0135]

[0136] in, is the centroid of the normalized two-dimensional phase-amplitude spectrum of the background noise measurement point.

[0137] The embodiment of the present invention calculates the phase distribution range of the centroid through step-by-step cluster analysis and feature extraction combined with composite cluster features, so that the phase distribution features corresponding to the measurement points finally obtained are more accurate and comprehensive, providing reliable support for the subsequent calculation of phase difference data.

[0138] Optional, Figure 4 The figure shows a schematic diagram of the arrangement of measurement points provided by an embodiment of the present invention, which may include an external measurement point on the moving side of phase B and a moving side of phase C, in addition to the internal measurement point on the moving side of phase A, the external measurement point on the moving side of phase A, the internal measurement point on the moving side of phase B, the internal measurement point on the moving side of phase C, and the background noise measurement point on the moving side of phase B. Figure 2 The measurement points shown in the figure can also be set at the three-phase static side of the circuit breaker, and the adaptive judgment of the partial discharge abnormal signal is performed in combination with the three-phase dynamic and static side measurement points and the background noise measurement points. The judgment logic of the adaptive judgment can be as follows: Figure 5 shown.

[0139] Although operations are depicted in a particular order, this should not be understood as requiring that the operations be performed in the particular order shown or in a sequential order.Multitasking and parallel processing may be advantageous under certain circumstances.

[0140] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0141] Corresponding to the above method embodiment, the embodiment of the present invention further provides an adaptive decision device for partial discharge abnormal signal, the structure of which is as follows: Figure 6 As shown, it may include: a measurement signal obtaining unit 10, an abnormal signal determining unit 20 and an abnormal signal judging unit 30.

[0142] The measurement signal obtaining unit 10 is used to obtain measurement signals outputted from different measurement points on the circuit breaker of the target electrical device, wherein the measurement points include a built-in measurement point on the moving side of phase A, a built-in measurement point on the moving side of phase B and a built-in measurement point on the moving side of phase C of the circuit breaker.

[0143] The abnormal signal determination unit 20 is used to determine whether the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal.

[0144] The abnormal signal judgment unit 30 is used to obtain the first phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase B when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output results of the built-in measurement point on the moving side of phase B are consistent with the output results of the built-in measurement point on the moving side of phase A, and the output results of the built-in measurement point on the moving side of phase C are inconsistent with the output results of the built-in measurement point on the moving side of phase A, and exclude the abnormal signal if the first phase difference data meets the first preset phase residual standard condition.

[0145] The abnormal signal judgment unit 30 is used to obtain the second phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase C when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output results of the built-in measurement point on the moving side of phase C are consistent with the output results of the built-in measurement point on the moving side of phase A, and the output results of the built-in measurement point on the moving side of phase B are inconsistent with the output results of the built-in measurement point on the moving side of phase A, and exclude the abnormal signal if the second phase difference data meets the second preset phase residual standard condition.

[0146] The abnormal signal judgment unit 30 is used to obtain the third phase difference data between the built-in measurement point on the moving side of phase A, the built-in measurement point on the moving side of phase B, and the built-in measurement point on the moving side of phase C when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, and if the output results of the built-in measurement point on the moving side of phase B, the built-in measurement point on the moving side of phase C are consistent, and if the third phase difference data meets the third preset phase residual standard condition, the abnormal signal is excluded.

[0147] Optionally, the abnormal signal judgment unit 30 can also be used to obtain fourth phase difference data between the built-in measurement point on the moving side of phase A and the external measurement point on the moving side of phase A when the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal, if the output result of the external measurement point on the moving side of phase A is consistent with the output result of the built-in measurement point on the moving side of phase A; and exclude the abnormal signal when the fourth phase difference data meets the fourth preset phase residual standard condition and the abnormal signal is a specified signal type.

[0148] Optionally, the abnormal signal judgment unit 30 can also be used to obtain fifth phase difference data between the built-in measurement point on the A-phase moving side and the background noise measurement point on the B-phase moving side when the measurement signal output by the built-in measurement point on the A-phase moving side is an abnormal signal, if the output result of the background noise measurement point on the B-phase moving side is consistent with the output result of the built-in measurement point on the A-phase moving side, and the output result of the external measurement point on the A-phase moving side is inconsistent with the output result of the built-in measurement point on the A-phase moving side, and eliminate the abnormal signal when the fifth phase difference data meets the fifth preset phase residual standard condition.

[0149] Optionally, the abnormal signal judgment unit 30 can also be used to obtain the sixth phase difference data between the built-in measurement point on the moving side of phase A, the external measurement point on the moving side of phase A and the background noise measurement point on the moving side of phase B, if the output results of the background noise measurement point on the moving side of phase B, the external measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase A are consistent. If the sixth phase difference data meets the sixth preset phase residual standard condition, the abnormal signal is excluded.

[0150] Optionally, the abnormal signal determination unit 20 can be specifically used to obtain the envelope characteristics of the measurement signal output by the measurement point; use the envelope characteristics to obtain a standardized two-dimensional phase-amplitude spectrum of the measurement signal; and based on the standardized two-dimensional phase-amplitude spectrum, identify whether the measurement signal is an abnormal signal.

[0151] Optionally, the abnormal signal determination unit 30 may further include: a phase difference data acquisition subunit.

[0152] The phase difference data acquisition subunit is used for obtaining the phase distribution characteristics corresponding to any measurement point using the standardized two-dimensional phase-amplitude spectrum of the measurement signal output by the measurement point; and obtaining the phase difference data between each measurement point using the phase distribution characteristics corresponding to each measurement point with consistent output results.

[0153] Optionally, the phase difference data acquisition subunit can be specifically used to cluster the standardized two-dimensional phase-amplitude spectrum of the measurement signal output from the measurement point based on a preset clustering threshold to obtain a first clustering result and a characteristic number; cluster the standardized two-dimensional phase-amplitude spectrum based on the first clustering result and the characteristic number to obtain a second clustering result; obtain a composite clustering feature of the standardized two-dimensional phase-amplitude spectrum based on the first clustering result and the second clustering result; calculate the centroid of the effective clustering interval of the standardized two-dimensional phase-amplitude spectrum using the composite clustering feature; calculate the phase distribution range of the centroid according to the preset sampling frequency to obtain the phase distribution feature corresponding to the measurement point.

[0154] The present invention provides an adaptive judgment device for partial discharge abnormal signals, which is used to monitor and analyze the output signals of different measuring points on the circuit breaker. First, determine whether the output signal of the built-in measuring point on the moving side of phase A is abnormal. In the case where the output of phase A is an abnormal signal, if the output of phase B is consistent with the output of phase A and the output of phase C is inconsistent, the first phase difference data between phase A and phase B is obtained, and if the first preset phase residual standard is met, the abnormal signal is excluded. Similarly, if phase C is consistent with phase A and phase B is inconsistent, the second phase difference data between phase A and phase C is obtained, and if the second preset standard is met, the abnormal signal is excluded. Finally, if the output results of phase B, phase C and phase A are consistent, the third phase difference data between the three is obtained, and if the third preset standard is met, the abnormal signal is also excluded. The present invention can effectively determine the interference signal of the wrong identification by analyzing the phase difference of the output signals of different measuring points of the circuit breaker, thereby realizing the adaptive analysis and judgment of the abnormal signal, thereby improving the reliability and accuracy of partial discharge monitoring.

[0155] Regarding the device in the above embodiment, the specific manner in which each unit performs the operation has been described in detail in the embodiment of the method, and will not be elaborated here.

[0156] The adaptive determination device for partial discharge abnormal signal comprises a processor and a memory. The measurement signal acquisition unit 10, the abnormal signal determination unit 20 and the abnormal signal determination unit 30 are all stored in the memory as program units. The processor executes the program units stored in the memory to realize corresponding functions.

[0157] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the kernel parameters can be adjusted to analyze the phase difference of the output signals at different measurement points of the circuit breaker, effectively determine the misidentified interference signal, thereby realizing adaptive analysis and judgment of abnormal signals, and thus improving the reliability and accuracy of partial discharge monitoring.

[0158] An embodiment of the present invention provides a computer-readable storage medium on which a program is stored. When the program is executed by a processor, the method for adaptively determining the partial discharge abnormal signal is implemented.

[0159] An embodiment of the present invention provides a processor, which is used to run a program, wherein the adaptive determination method of the partial discharge abnormal signal is executed when the program is running.

[0160] like Figure 7As shown, an embodiment of the present invention provides an electronic device 1000, which includes at least one processor 1001, at least one memory 1002 connected to the processor 1001, and a bus 1003; wherein the processor 1001 and the memory 1002 communicate with each other through the bus 1003; the processor 1001 is used to call the program instructions in the memory 1002 to execute the above-mentioned adaptive judgment method of partial discharge abnormal signal. The electronic device in this article can be a server, a PC, a PAD, a mobile phone, etc.

[0161] The present invention also provides a computer program product, which, when executed on an electronic device, is suitable for executing the program of the steps of the adaptive decision method for initializing a partial discharge abnormal signal.

[0162] The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatuses, electronic devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable device to generate a machine, so that the instructions executed by the processor of the computer or other programmable device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0163] In a typical configuration, an electronic device includes one or more processors (CPU), a memory, and a bus. The electronic device may also include an input / output interface, a network interface, and the like.

[0164] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip. The memory is an example of a computer-readable medium.

[0165] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0166] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the positions or elements referred to must have specific directions, be constructed and operate in specific directions. Therefore, they should not be understood as limitations of the present invention.

[0167] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. It should also be noted that the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0168] It should be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented 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.

[0169] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An adaptive judgment method for partial discharge abnormal signal, characterized in that: include: Obtaining measurement signals outputted from different measurement points on a circuit breaker of a target electrical device, wherein the measurement points include a built-in measurement point on the moving side of phase A, a built-in measurement point on the moving side of phase B, and a built-in measurement point on the moving side of phase C of the circuit breaker; Determine whether the measurement signal output by the built-in measurement point on the moving side of phase A is an abnormal signal; In the case where the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output results of the built-in measurement point on the moving side of phase B are consistent with the output results of the built-in measurement point on the moving side of phase A, and the output results of the built-in measurement point on the moving side of phase C are inconsistent with the output results of the built-in measurement point on the moving side of phase A, then obtaining first phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase B, and if the first phase difference data satisfies a first preset phase residual standard condition, excluding the abnormal signal; In the case where the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output result of the built-in measurement point on the moving side of phase C is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the built-in measurement point on the moving side of phase B is inconsistent with the output result of the built-in measurement point on the moving side of phase A, then obtain second phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase C, and if the second phase difference data satisfies a second preset phase residual standard condition, exclude the abnormal signal; In the case where the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output results of the built-in measurement point on the moving side of phase B, the built-in measurement point on the moving side of phase C and the built-in measurement point on the moving side of phase A are consistent, then third phase difference data between the built-in measurement point on the moving side of phase A, the built-in measurement point on the moving side of phase B and the built-in measurement point on the moving side of phase C are obtained, and if the third phase difference data meets the third preset phase residual standard condition, the abnormal signal is excluded.

2. The method according to claim 1, characterized in that The measuring point also includes an external measuring point arranged on the A-phase moving side of the circuit breaker, and the method further includes: In the case where the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output result of the external measurement point on the moving side of phase A is consistent with the output result of the built-in measurement point on the moving side of phase A, fourth phase difference data between the built-in measurement point on the moving side of phase A and the external measurement point on the moving side of phase A is obtained, and when the fourth phase difference data meets the fourth preset phase residual standard condition and the abnormal signal is a specified signal type, the abnormal signal is excluded.

3. The method according to claim 1, characterized in that The measuring points also include an external measuring point on the A-phase moving side of the circuit breaker and a background noise measuring point on the B-phase moving side, and the method also includes: In the case that the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output result of the background noise measurement point on the moving side of phase B is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the external measurement point on the moving side of phase A is inconsistent with the output result of the built-in measurement point on the moving side of phase A, then the fifth phase difference data between the built-in measurement point on the moving side of phase A and the background noise measurement point on the moving side of phase B is obtained, and when the fifth phase difference data meets the fifth preset phase residual standard condition, the abnormal signal is excluded.

4. The method according to claim 3, characterized in that Also includes: In the case that the measurement signal output by the built-in measurement point on the moving side of phase A is the abnormal signal, if the output results of the background noise measurement point on the moving side of phase B, the external measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase A are consistent, then the sixth phase difference data between the built-in measurement point on the moving side of phase A, the external measurement point on the moving side of phase A and the background noise measurement point on the moving side of phase B are obtained, and if the sixth phase difference data meets the sixth preset phase residual standard condition, the abnormal signal is excluded.

5. The method according to any one of claims 1 to 4, characterized in that The abnormal signal determination process includes: Obtaining envelope characteristics of the measurement signal output by the measurement point; Using the envelope feature, a standardized two-dimensional phase-amplitude spectrum of the measurement signal is obtained; Based on the standardized two-dimensional phase-amplitude spectrum, it is identified whether the measurement signal is the abnormal signal.

6. The method according to claim 5, characterized in that The process of obtaining the phase difference data includes: For any of the measuring points: using the standardized two-dimensional phase-amplitude spectrum of the measuring signal outputted from the measuring point, obtaining a phase distribution feature corresponding to the measuring point; The phase difference data between the measurement points are obtained by utilizing the phase distribution characteristics corresponding to the measurement points having consistent output results.

7. The method according to claim 6, characterized in that The step of using the standardized two-dimensional phase-amplitude spectrum of the measurement signal outputted from the measurement point to obtain a phase distribution feature corresponding to the measurement point includes: Clustering the standardized two-dimensional phase-amplitude spectrum of the measurement signal outputted from the measurement point based on a preset clustering threshold to obtain a first clustering result and a characteristic number; Clustering the standardized two-dimensional phase-amplitude spectrum based on the first clustering result and the characteristic number to obtain a second clustering result; Based on the first clustering result and the second clustering result, obtaining a composite clustering feature of the standardized two-dimensional phase-amplitude spectrum; Utilizing the composite clustering feature, calculating the centroid of the effective clustering interval of the standardized two-dimensional phase-amplitude spectrum; The phase distribution range of the centroid is calculated according to a preset sampling frequency to obtain the phase distribution characteristics corresponding to the measurement point.

8. An adaptive decision device for abnormal partial discharge signal, characterized in that: include: The measurement signal acquisition unit, the abnormal signal determination unit and the abnormal signal judgment unit, The measurement signal obtaining unit is used to obtain measurement signals outputted by different measurement points on the circuit breaker of the target electrical device, wherein the measurement points include a built-in measurement point on the moving side of phase A, a built-in measurement point on the moving side of phase B, and a built-in measurement point on the moving side of phase C of the circuit breaker; The abnormal signal determination unit is used to determine whether the measurement signal output by the built-in measurement point on the A-phase moving side is an abnormal signal; The abnormal signal judgment unit is used for obtaining first phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase B if the output result of the built-in measurement point on the moving side of phase B is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the built-in measurement point on the moving side of phase C is inconsistent with the output result of the built-in measurement point on the moving side of phase A, and excluding the abnormal signal if the first phase difference data satisfies a first preset phase residual standard condition; The abnormal signal judgment unit is used for obtaining second phase difference data between the built-in measurement point on the moving side of phase A and the built-in measurement point on the moving side of phase C if the output result of the built-in measurement point on the moving side of phase C is consistent with the output result of the built-in measurement point on the moving side of phase A, and the output result of the built-in measurement point on the moving side of phase B is inconsistent with the output result of the built-in measurement point on the moving side of phase A, and excluding the abnormal signal if the second phase difference data meets a second preset phase residual standard condition; The abnormal signal judgment unit is used to obtain third phase difference data between the built-in measurement point on the moving side of phase A, the built-in measurement point on the moving side of phase B, and the built-in measurement point on the moving side of phase C, if the output results of the built-in measurement point on the moving side of phase B, the built-in measurement point on the moving side of phase C are consistent, and exclude the abnormal signal if the third phase difference data meets a third preset phase residual standard condition.

9. A computer-readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the adaptive determination method of a partial discharge abnormality signal according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: The electronic device includes at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the adaptive judgment method of partial discharge abnormality signal according to any one of claims 1 to 7.

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