Disconnecting switch on-off state judgment method and device, medium and program product

Abstract

The invention provides a disconnecting switch on-off state judgment method and device, a medium and a program product. Relates to the technical field of power systems. The method comprises the following steps: acquiring motion data and operation data of a motion part in the disconnecting switch acquired by a millimeter wave radar, wherein the operation data comprises opening and closing; according to the motion data, determining an actual motion track of the motion part; according to the actual movement track, determining speed change characteristics and displacement change characteristics in the movement process; and determining the on-off state of the disconnecting switch according to the speed change characteristic and the displacement change characteristic based on the on-off standard characteristic and the operation data corresponding to the disconnecting switch. According to the technical scheme, the detection accuracy of the opening and closing state of the disconnecting switch is improved.

Description

Technical Field

[0001] The present application relates to the technical field of power systems, and in particular to a method, device, medium and program product for determining the disconnection and closing states of an isolating switch. Background Art

[0002] In the power system, the isolating switch is an important electrical device used to provide a clear disconnection point in the circuit to ensure the safety of personnel and equipment during maintenance or troubleshooting. Therefore, during operation or maintenance, it is necessary to accurately judge the disconnection and closing status of the isolating switch.

[0003] In the related art, the judgment of the opening and closing state of the isolating switch mainly relies on mechanical sensors such as micro switches or Hall sensors. These mechanical sensors are set on the isolating switch and judge the opening and closing state of the isolating switch by detecting the contact state of the mechanical switch, wherein the disconnection of the contact indicates that the isolating switch is in the opening position; the closing of the contact indicates that the isolating switch is in the closing position.

[0004] However, the above judgment method may cause misjudgment or missed judgment, thus affecting the stable operation of the power system. Summary of the invention

[0005] The present application provides a method, device, medium and program product for judging the disconnection and closing state of an isolating switch, so as to achieve the effect of improving the accuracy of detecting the disconnection and closing state of the isolating switch.

[0006] In a first aspect, the present application provides a method for determining the disconnection state of an isolating switch, comprising:

[0007] Obtaining the motion data and operation data of the moving parts in the isolating switch collected by the millimeter wave radar, the operation data includes: opening and closing;

[0008] According to the motion data, the actual motion trajectory of the moving parts is determined;

[0009] According to the actual motion trajectory, determine the velocity change characteristics and displacement change characteristics during the motion process;

[0010] Based on the opening and closing standard characteristics and operation data corresponding to the disconnecting switch, the opening and closing state of the disconnecting switch is determined according to the speed change characteristics and displacement change characteristics.

[0011] In a possible implementation, based on the opening and closing standard characteristics and operation data corresponding to the disconnector, the opening and closing state of the disconnector is determined according to the speed change characteristics and the displacement change characteristics, including:

[0012] Based on the disconnection and closing standard features and operation data corresponding to the disconnector, the corresponding standard features are obtained, wherein the standard features include: standard movement change features and standard movement features;

[0013] Determine the motion change similarity and motion similarity according to the standard feature, the speed change feature and the displacement change feature;

[0014] The opening and closing states of the disconnecting switch are determined based on the motion change similarity and the motion similarity.

[0015] In a possible implementation, determining the motion change similarity and the motion similarity according to the standard feature, the speed change feature, and the displacement change feature includes:

[0016] Determine the motion change characteristics and movement characteristics according to the velocity change characteristics and the displacement change characteristics, wherein the motion change characteristics include: instantaneous velocity, instantaneous acceleration and displacement change, and the movement characteristics include: total displacement, maximum velocity, maximum acceleration and movement duration;

[0017] Determine the motion change similarity according to the standard motion change feature and the motion change feature;

[0018] The motion similarity is determined based on the standard motion features and the motion features.

[0019] In a possible implementation, determining the motion change similarity according to the standard motion change feature and the motion change feature includes:

[0020] Based on the dynamic time warping algorithm, the motion change similarity between the standard motion change feature and the motion change feature is determined.

[0021] In a possible implementation, determining the motion similarity according to the standard motion feature and the motion feature includes:

[0022] The similarity of motion changes between the standard motion feature and the motion feature is determined by a similarity algorithm, wherein the similarity algorithm includes cosine similarity.

[0023] In a possible implementation manner, based on the disconnection and closing standard features and operation data corresponding to the disconnector, the corresponding standard features are obtained, including:

[0024] If the motion type is closing, determine the closing feature in the opening and closing standard feature as the corresponding standard feature;

[0025] If the motion type is opening, determine the opening feature in the opening and closing standard feature as the corresponding standard feature.

[0026] In a possible implementation manner, determining the opening and closing state of the disconnector according to the motion change similarity and the motion similarity includes:

[0027] If the motion change similarity is greater than the motion change similarity threshold, and the motion similarity is greater than the motion similarity threshold, it is determined that the disconnector is normally opened and closed;

[0028] If the motion change similarity is less than or equal to the motion change similarity threshold, or the motion similarity is less than or equal to the motion similarity threshold, it is determined that the disconnector is abnormally opened or closed.

[0029] In a possible implementation, determining the velocity change characteristics and displacement change characteristics during the motion process according to the actual motion trajectory includes:

[0030] Doppler effect analysis is performed on the actual motion trajectory, and velocity change characteristics are obtained according to phase changes. The velocity change characteristics include instantaneous velocity and instantaneous acceleration.

[0031] The actual motion trajectory is reconstructed by displacement to determine the displacement change characteristics, which include the displacement change amount.

[0032] In a possible implementation, determining the actual motion trajectory of the moving component according to the motion data includes:

[0033] According to the motion data, filtering is performed to obtain first motion data after noise is eliminated;

[0034] According to the first motion data, a background elimination algorithm is adopted to determine the actual motion trajectory of the moving component.

[0035] In a possible implementation manner, before determining the actual motion trajectory of the moving component according to the motion data, the method further includes:

[0036] Obtaining environmental information, including temperature data and vibration data;

[0037] Correct the motion data based on the compensation algorithm and environmental information;

[0038] According to the corrected motion data, the actual motion trajectory of the moving part is determined.

[0039] In a possible implementation manner, a self-test unit is deployed in the millimeter wave radar, including:

[0040] When the millimeter-wave radar receives a self-test instruction, the self-test unit performs a self-test operation and obtains self-test data.

[0041] In a possible implementation manner, after determining that the disconnecting and closing of the isolating switch is abnormal, the method further includes:

[0042] Based on the opening and closing standard characteristics and operation data corresponding to the disconnector, and according to the speed change characteristics and displacement change characteristics, an abnormal detection algorithm is used to determine the abnormal mode of the disconnector.

[0043] In a second aspect, the present application provides a device for determining the disconnection state of an isolating switch, comprising:

[0044] An acquisition module is used to acquire motion data and operation data of moving parts in the isolating switch collected by the millimeter wave radar, and the operation data includes: opening and closing;

[0045] A processing module, used for determining the actual motion trajectory of the moving part according to the motion data;

[0046] The processing module is also used to determine the speed change characteristics and displacement change characteristics during the movement process according to the actual movement trajectory;

[0047] The determination module is used to determine the opening and closing state of the disconnecting switch based on the opening and closing standard characteristics and operation data corresponding to the disconnecting switch according to the speed change characteristics and the displacement change characteristics.

[0048] In a possible implementation manner, the determination module is specifically configured to:

[0049] Based on the disconnection and closing standard features and operation data corresponding to the disconnector, the corresponding standard features are obtained, wherein the standard features include: standard movement change features and standard movement features;

[0050] Determine the motion change similarity and motion similarity according to the standard feature, the speed change feature and the displacement change feature;

[0051] The opening and closing states of the disconnecting switch are determined based on the motion change similarity and the motion similarity.

[0052] In a possible implementation manner, the determination module is further configured to:

[0053] Determine the motion change characteristics and movement characteristics according to the velocity change characteristics and the displacement change characteristics, wherein the motion change characteristics include: instantaneous velocity, instantaneous acceleration and displacement change, and the movement characteristics include: total displacement, maximum velocity, maximum acceleration and movement duration;

[0054] Determine the motion change similarity according to the standard motion change feature and the motion change feature;

[0055] The motion similarity is determined based on the standard motion features and the motion features.

[0056] In a possible implementation manner, the determination module is further configured to:

[0057] Based on the dynamic time warping algorithm, the motion change similarity between the standard motion change feature and the motion change feature is determined.

[0058] In a possible implementation manner, the determination module is further configured to:

[0059] The similarity of motion changes between the standard motion feature and the motion feature is determined by a similarity algorithm, wherein the similarity algorithm includes cosine similarity.

[0060] In a possible implementation manner, the determination module is further configured to:

[0061] If the motion type is closing, determine the closing feature in the opening and closing standard feature as the corresponding standard feature;

[0062] If the motion type is opening, determine the opening feature in the opening and closing standard feature as the corresponding standard feature.

[0063] In a possible implementation manner, the determination module is further configured to:

[0064] If the motion change similarity is greater than the motion change similarity threshold, and the motion similarity is greater than the motion similarity threshold, it is determined that the disconnector is normally opened and closed;

[0065] If the motion change similarity is less than or equal to the motion change similarity threshold, or the motion similarity is less than or equal to the motion similarity threshold, it is determined that the disconnector is abnormally opened or closed.

[0066] In a possible implementation manner, the processing module is further configured to:

[0067] Doppler effect analysis is performed on the actual motion trajectory, and velocity change characteristics are obtained according to phase changes. The velocity change characteristics include instantaneous velocity and instantaneous acceleration.

[0068] The actual motion trajectory is reconstructed by displacement to determine the displacement change characteristics, which include the displacement change amount.

[0069] In a possible implementation manner, the processing module is further configured to:

[0070] According to the motion data, filtering is performed to obtain first motion data after noise is eliminated;

[0071] According to the first motion data, a background elimination algorithm is adopted to determine the actual motion trajectory of the moving component.

[0072] In a possible implementation manner, the processing module is further configured to:

[0073] Obtaining environmental information, including temperature data and vibration data;

[0074] Correct the motion data based on the compensation algorithm and environmental information;

[0075] According to the corrected motion data, the actual motion trajectory of the moving part is determined.

[0076] In a possible implementation manner, a self-check unit and a processing module are deployed in the millimeter wave radar, and are also used for:

[0077] When the millimeter-wave radar receives a self-test instruction, the self-test unit performs a self-test operation and obtains self-test data.

[0078] In a possible implementation manner, the determination module is further configured to:

[0079] Based on the opening and closing standard characteristics and operation data corresponding to the disconnector, and according to the speed change characteristics and displacement change characteristics, an abnormal detection algorithm is used to determine the abnormal mode of the disconnector.

[0080] In a third aspect, the present application provides an electronic device, including: a memory, a processor;

[0081] Memory stores computer-executable instructions;

[0082] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0083] In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above first aspect and / or various possible implementations of the first aspect.

[0084] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementations of the first aspect.

[0085] The present application provides a method, device, medium and program product for judging the separation and closing state of the isolating switch. The millimeter wave radar sensor is used to collect the motion data and operation data of the moving parts in the isolating switch to ensure the accuracy of the collected motion data and operation data. At the same time, the use of millimeter wave radar for data collection can also improve the operation and maintenance efficiency and reduce the operation and maintenance cost. The original data collected by the millimeter wave radar is processed by an algorithm to determine the actual motion trajectory of the moving parts. The use of real-time data for analysis can timely detect abnormalities in the movement process of the isolating switch, timely warn, and reduce the possibility of failure. The speed change characteristics and displacement change characteristics in the actual motion trajectory are compared with the pre-established separation and closing standard characteristics, and the actual separation and closing state of the isolating switch is accurately judged through the whole process of movement, and the detection sensitivity of the "not fully in place" situation is improved. The millimeter wave radar is used to realize the judgment of the opening and closing state of the isolating switch, breaking through the limitations of traditional image-based or contact sensors, achieving non-contact all-weather monitoring, and improving the accuracy of the detection of the separation and closing state of the isolating switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0087] Figure 1 A schematic diagram of a scenario for judging the disconnection state of an isolating switch provided in an embodiment of the present application;

[0088] Figure 2 A flow chart of a method for determining the disconnection state of an isolating switch provided in an embodiment of the present application Figure 1 ;

[0089] Figure 3 A flow chart of a method for determining the disconnection state of an isolating switch provided in an embodiment of the present application Figure 2 ;

[0090] Figure 4 A schematic diagram of a process for determining similarity provided in an embodiment of the present application;

[0091] Figure 5 A schematic diagram of the structure of a device for determining the disconnection state of an isolating switch provided in an embodiment of the present application;

[0092] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0093] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0094] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0095] In the related art, the opening and closing states of the dual-position device of the isolating switch are mainly judged by mechanical sensors such as micro switches or Hall sensors. The current method for judging the opening and closing states of mechanical sensors uses a single state point of a single sensor as the basis for opening or closing the switch, which has the problem of insufficient judgment accuracy. In addition, mechanical sensors are operated in outdoor environments for a long time and are easily affected by environmental factors, resulting in reduced performance and reliability of the method for judging the opening and closing states of isolating switches.

[0096] The method for judging the disconnection and closing state of the isolating switch provided in the embodiment of the present application uses a millimeter-wave radar to collect high-precision displacement, speed and other multi-dimensional data of moving parts in real time in a non-contact manner, greatly improving the sampling density and measurement accuracy of the original data, and providing a reliable data basis for the identification of the disconnection and closing state of the isolating switch. By analyzing the time series characteristics of the motion trajectory of the entire opening and closing process, combined with the preset opening and closing standard characteristics, accurate and effective identification results can be obtained. The millimeter-wave radar adopts a physically isolated deployment architecture, and realizes electrical isolation from the isolating switch body through a wireless transmission module, so that there is no need to interrupt the operation of the isolating switch during maintenance, reducing the losses caused by power outages during maintenance, and reducing potential safety hazards during maintenance.

[0097] Figure 1 A schematic diagram of a scenario for judging the disconnection state of an isolating switch provided in an embodiment of the present application. Figure 1 As shown, the specific application scenarios of the present application include: a millimeter wave radar 11, an isolating switch 12 and a control device 13, wherein:

[0098] The millimeter wave radar 11 can receive and execute the information collection instructions and self-test instructions issued by the control device 13. At the same time, the millimeter wave radar 11 can also convert the collected data into digital signals through the analog-to-digital converter and transmit them to the control device 13, providing a basis for the control device 13 to judge the opening and closing state of the disconnecting switch. The disconnecting switch 12 can receive the operation instructions issued by the control device 13, and control the moving parts in the disconnecting switch 12 to perform closing or opening operations according to the operation instructions. The control device 13 controls the movement of the disconnecting switch 12, and accurately judges the state of the disconnecting switch 12 by analyzing the movement data and operation data of the moving parts in the disconnecting switch 12.

[0099] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0100] Figure 2 A flow chart of a method for determining the disconnection state of an isolating switch provided in an embodiment of the present application Figure 1 .like Figure 2 As shown, the method includes:

[0101] S201. Obtaining motion data and operation data of moving parts in the isolating switch collected by the millimeter wave radar, where the operation data includes: opening and closing.

[0102] The millimeter-wave radar needs to be deployed near the isolating switch, and the transmitting unit of the millimeter-wave radar is aimed at the moving parts of the isolating switch to ensure that the radar beam of the millimeter-wave radar can cover the complete movement trajectory of the moving parts of the isolating switch. The millimeter-wave radar uses a frequency-modulated continuous wave radar with an operating frequency of 77GHz-81GHz. Different millimeter-wave radars of different models are used for deployment to reduce the cost of installation and commissioning. Optionally, a multi-input multi-output radar is used to transmit orthogonal waveforms to obtain a larger instantaneous dynamic range information and effectively resist blocking saturation interference, or beamforming technology is used to achieve directional beam transmission and reception to avoid interference from the movement of adjacent equipment.

[0103] The frequency modulated continuous wave radar transmits a continuous wave signal with a frequency that changes over time, and is used for distance and speed measurement at the same time. The operation data is the control signal of the disconnector, including the opening command and the closing command. Optionally, the operation data also includes the operation trigger timestamp. The millimeter wave radar sensor collects the motion data of the moving parts in the disconnector in real time, including the position, speed and other dynamic information of the moving parts in the disconnector. At the same time, the operation data of the disconnector, i.e., opening or closing, is recorded.

[0104] S202: Determine the actual motion trajectory of the moving component according to the motion data.

[0105] The actual motion trajectory is the motion trajectory of the moving parts in the disconnector in the real physical space. The motion data collected by the millimeter-wave radar is processed and analyzed to extract the actual motion trajectory of the moving parts over time.

[0106] S203: Determine the speed change characteristics and displacement change characteristics during the movement process according to the actual movement trajectory.

[0107] By analyzing the time domain characteristics and frequency domain characteristics of the actual motion trajectory, the speed of the moving parts at different time points is determined, and then the speed change characteristics are determined. At the same time, the total displacement of the moving parts and the segmented displacement at different time points are determined, and then the displacement change characteristics are analyzed and determined.

[0108] S204. Based on the opening and closing standard characteristics and operation data corresponding to the disconnector, and according to the speed change characteristics and displacement change characteristics, determine the opening and closing state of the disconnector.

[0109] The opening and closing standard features are obtained by analyzing and processing the standard data of normal opening and closing operations collected in the laboratory or at the work site. When collecting, the opening and closing operation data of disconnectors of different models and the opening and closing operation data of disconnectors of the same model with different parameter configurations should be collected. Optionally, the signal and parameter configuration are input through the user interface, or the opening and closing operation standard data of disconnectors of different models with different parameter configurations are automatically learned and classified through machine learning.

[0110] The collected standard data is processed, and by analyzing the time domain characteristics and frequency domain characteristics in the radar data, a standard that can represent the speed change characteristics and displacement change characteristics that the disconnector should have when opening and closing is established to form the opening and closing standard characteristics. Optionally, the opening and closing standard characteristics may include a displacement threshold, a time window, and a speed waveform template.

[0111] The speed change characteristics and displacement change characteristics in the actual movement process are compared and analyzed with the opening and closing standard characteristics. Combined with the operation data, the operation of the disconnector is determined to be opening or closing, and the actual opening and closing state of the disconnector is determined through pattern recognition, machine learning or logical reasoning.

[0112] The method for judging the opening and closing state of the isolating switch provided in the embodiment of the present application collects the motion data of the moving parts of the isolating switch through the millimeter-wave radar deployed near the isolating switch. The non-contact measurement of the millimeter-wave radar can avoid mechanical wear, reduce the maintenance frequency, and improve the overall stability; at the same time, the millimeter-level trajectory reconstruction accuracy of the millimeter-wave radar can significantly improve the data reliability. The actual motion trajectory of the moving parts is obtained by processing the motion data collected by the millimeter-wave radar. Through the actual motion trajectory, the speed change characteristics and displacement change characteristics that can represent the motion state of the moving parts during the motion process are obtained. Finally, through the machine learning method, the obtained speed change characteristics and displacement change characteristics are compared with the opening and closing standard characteristics to determine the opening and closing state of the isolating switch. By detecting the motion process of the moving parts, fine-grained motion deviations can be effectively identified, thereby improving the efficiency and accuracy of the judgment of the opening and closing state.

[0113] Figure 3 A flow chart of a method for determining the disconnection state of an isolating switch provided in an embodiment of the present application Figure 2 .like Figure 3 As shown, in this embodiment Figure 2 Based on the embodiment, a method for judging the disconnection state of the disconnector is described in detail, and the method includes:

[0114] S301. Obtaining motion data and operation data of moving parts in the isolating switch collected by the millimeter wave radar, where the operation data includes: opening and closing.

[0115] The execution process of this step refers to the execution process described in step S201 and will not be described in detail here.

[0116] S302: Filter the motion data to obtain first motion data after noise is eliminated.

[0117] Filtering can remove noise and unnecessary components from the original signal and retain effective information. By filtering the collected motion data, noise such as mechanical vibration and electromagnetic interference is eliminated to obtain smooth first motion data. Among them, the filtering method can use Kalman filtering or wavelet denoising.

[0118] S303: Determine the actual motion trajectory of the moving component using a background elimination algorithm according to the first motion data.

[0119] The background elimination algorithm is used to extract the actual motion information of the target object from the included signal. By using the background elimination algorithm to process the first motion data, static clutter suppression can be effectively achieved, the dynamic target signal of the moving parts in the disconnector can be focused, and the actual motion trajectory of the moving parts of the disconnector can be obtained.

[0120] In a possible implementation, before determining the actual motion trajectory of the moving component based on the motion data, it also includes: obtaining environmental information, the environmental information including temperature data and vibration data; correcting the motion data based on the compensation algorithm and the environmental information; and determining the actual motion trajectory of the moving component based on the corrected motion data.

[0121] Obtain temperature data around the disconnector or radar, and use the temperature compensation algorithm of the atmospheric refractive index model to correct the motion data to eliminate the measurement deviation of motion data caused by thermal expansion and contraction. Vibration data is obtained through real-time detection by vibration sensors. Vibration data can represent the vibration of the radar platform or the surrounding environment. According to the vibration data, the motion data is corrected and compensated to eliminate the impact of vibration on the radar signal. The corrected motion data can better reflect the actual motion of the moving parts.

[0122] S304, performing Doppler effect analysis on the actual motion trajectory, and obtaining velocity change characteristics according to phase changes, wherein the velocity change characteristics include instantaneous velocity and instantaneous acceleration.

[0123] The Doppler effect is a phenomenon in which the frequency of the received radar signal changes when there is relative motion between the radar signal transmission source or reflection source and the radar signal receiver. By analyzing the Doppler effect in the actual motion trajectory, the relative motion of the moving parts in the millimeter wave radar and the isolating switch can be obtained. According to the Doppler effect, the phase change in the actual motion trajectory is determined, and then the speed change characteristics of the moving object in the isolating switch are obtained.

[0124] Optionally, a speed-time curve is obtained through phase change. The speed-time curve can provide instantaneous speed information of the moving part at each moment and the speed change trend over time.

[0125] S305 , reconstruct the displacement of the actual motion trajectory and determine the displacement change characteristics, where the displacement change characteristics include the displacement change amount.

[0126] By analyzing the displacement change characteristics, we can gain a deep understanding of the movement state of the isolating switch and thus determine the state of the isolating switch.

[0127] Optionally, if the millimeter wave radar is a frequency modulated continuous millimeter wave radar, the difference frequency signal in the frequency modulated continuous millimeter wave radar is used to directly measure the actual motion trajectory to determine a displacement-time curve representing the displacement change characteristics.

[0128] S306. Based on the disconnection and closing standard characteristics and operation data corresponding to the disconnector, corresponding standard characteristics are obtained, wherein the standard characteristics include: standard movement change characteristics and standard movement characteristics.

[0129] In this step, it is determined whether the step performed by the disconnector is closing or opening according to the operation data. According to the opening and closing standard characteristics corresponding to the disconnector and the operation data, the corresponding standard characteristics are obtained. The standard motion change characteristics are the changes that occur over time in the moving parts of the disconnector during the movement process. The standard motion characteristics are the static inherent properties exhibited by the moving parts of the disconnector during the movement process, which are used to measure the overall characteristics of the movement process.

[0130] In a possible implementation, if the movement type is closing, the closing feature in the closing and opening standard features is determined as the corresponding standard feature; if the movement type is opening, the opening feature in the closing and opening standard features is determined as the corresponding standard feature.

[0131] S307: Determine the motion change similarity and the motion similarity according to the standard feature, the speed change feature and the displacement change feature.

[0132] In this step, the standard features are compared with the speed change features and displacement change features collected during the actual operation to determine the motion change similarity and motion similarity. The motion change similarity is the degree of similarity between the changes in physical quantities such as speed and displacement during the actual operation and the standard motion change features, reflecting whether the dynamic characteristics of the disconnector during movement meet expectations. The motion similarity focuses on the similarity of the overall motion process.

[0133] S308. Determine the on / off state of the disconnector according to the motion change similarity and the motion similarity.

[0134] If both the motion change similarity and the motion similarity are high, it means that the motion process of the disconnector is highly consistent with the standard feature, and it can be considered that the disconnection and closing states of the disconnector are normal.

[0135] In one possible implementation, if the motion change similarity is greater than the motion change similarity threshold, and the motion similarity is greater than the motion similarity threshold, it is determined that the separation and closing of the isolating switch is normal; if the motion change similarity is less than or equal to the motion change similarity threshold, or the motion similarity is less than or equal to the motion similarity threshold, it is determined that the separation and closing of the isolating switch is abnormal.

[0136] When the motion change similarity is greater than the motion change similarity threshold and the motion similarity is greater than the motion similarity threshold, it indicates that the motion process of the disconnector is consistent with expectations. At this time, the disconnector is closed or opened, and the disconnector is determined to be normal. When the motion change similarity is less than or equal to the motion change similarity threshold, or the motion similarity is less than or equal to the motion similarity threshold, it indicates that the motion process of the disconnector is inconsistent with expectations, and there is an abnormality in the opening or closing of the disconnector, which requires timely inspection or maintenance.

[0137] In one possible implementation, after determining that the disconnector is abnormal, based on the disconnection and closing standard characteristics and operation data corresponding to the disconnector, an abnormality detection algorithm is used to determine the abnormal mode of the disconnector according to the speed change characteristics and displacement change characteristics.

[0138] After the disconnector is determined to be abnormal, fault analysis is performed. The statistically-based algorithm or machine learning model trained with historical abnormal data can capture subtle changes in the movement of the disconnector from the speed change characteristics and displacement change characteristics, and identify abnormal modes of moving parts in the disconnector. Abnormal modes include: motion interruption, jamming, and rebound.

[0139] The method for judging the disconnection and closing state of the disconnector provided in the embodiment of the present application obtains the motion data and operation data of the moving parts in the disconnector collected by the millimeter wave radar, and performs filtering and background elimination algorithm processing to obtain the actual motion trajectory, and then performs displacement reconstruction and speed-time curve analysis, and at the same time combines the multi-threshold joint judgment of motion change similarity and motion similarity to achieve accurate judgment of the disconnection and closing state of the disconnector. This method improves the accuracy and reliability of the disconnector status monitoring, can timely detect the fault or performance degradation of the disconnector, provides a strong guarantee for the safe and stable operation of the power system, and helps to improve the maintenance efficiency and operation reliability of the disconnector.

[0140] Figure 4 Schematic diagram of the process of determining similarity provided in the embodiment of the present application. Figure 4 As shown, in this embodiment Figure 3 Based on the embodiment, the similarity determination method involved in step S307 is described in detail, and the method includes:

[0141] S401. Determine motion change characteristics and movement characteristics according to speed change characteristics and displacement change characteristics, wherein the motion change characteristics include: instantaneous speed, instantaneous acceleration and displacement change, and the movement characteristics include: total displacement, maximum speed, maximum acceleration and movement duration.

[0142] By analyzing the speed change characteristics and displacement change characteristics of the moving parts of the disconnector, more comprehensive motion change characteristics and motion characteristics are determined. The motion change characteristics reflect the instantaneous changes in speed, acceleration and displacement, and the motion characteristics represent the overall situation of the entire motion process.

[0143] S402: Determine the motion change similarity according to the standard motion change feature and the motion change feature.

[0144] The similarity between the standard motion change feature and the motion change feature is determined by the similarity algorithm, the degree of proximity between the actual motion state and the normal motion state is evaluated, and the motion change similarity is determined. The higher the motion change similarity, the closer the actual motion state of the moving parts in the disconnector is to the normal state; the lower the similarity, the more abnormal or faulty the moving parts of the disconnector may be.

[0145] S403: Determine motion similarity according to the standard motion feature and the motion feature.

[0146] By comparing the standard motion features with the motion features, the motion similarity is determined. The motion similarity is used to evaluate the overall similarity between the actual motion process and the normal motion process.

[0147] In a possible implementation, based on a dynamic time warping algorithm, the motion change similarity between the standard motion change feature and the motion change feature is determined.

[0148] The dynamic time warping algorithm is an algorithm used to measure the similarity between the standard motion change feature and the motion change feature. By bending the time axis, the optimal alignment path between the standard motion change feature and the motion change feature is found, thereby determining the motion change similarity.

[0149] When applying the dynamic time warping algorithm, the standard motion change features and motion change features are first represented in the form of time series. Then, by calculating the distance between each point in the two time series, a distance two-dimensional matrix is ​​constructed, where each element in the distance two-dimensional matrix represents the distance between the real-time motion data and the standard template data at different time points. After that, using the idea of ​​dynamic programming, an optimal path from the upper left corner to the lower right corner is found in the distance matrix. The sum of the distances on the optimal path is the dynamic time warping distance. The smaller the dynamic time warping distance, the greater the similarity of motion changes.

[0150] In a possible implementation, the similarity of the motion change between the standard motion feature and the motion feature is determined by a similarity algorithm, and the similarity algorithm includes cosine similarity.

[0151] The similarity between the standard motion feature and the motion feature is measured by calculating the cosine value of the angle between the standard motion feature and the motion feature. The range of the cosine value is between [-1, 1]. The closer the cosine value is to 1, the more similar the standard motion feature and the motion feature are.

[0152] In this step, first, the standard motion feature and the motion feature are respectively expressed in the form of vectors. Then, according to the definition of the vector, the cosine similarity between the two vectors is determined. Finally, according to the size of the cosine similarity, the motion similarity between the standard motion feature and the motion feature is determined.

[0153] In a possible implementation, a self-test unit is deployed in the millimeter wave radar, including: when the millimeter wave radar receives a self-test instruction, the self-test unit performs a self-test operation and obtains self-test data.

[0154] The millimeter-wave radar is equipped with a self-test unit, which is responsible for self-testing the radar signal quality regularly, or after receiving a self-test command. When self-testing is required, the self-test unit can quickly start and generate analog signals to conduct a comprehensive test of the radar system to ensure its stable operation. Once an abnormality is found in the millimeter-wave radar, the millimeter-wave radar alarm is triggered and the disconnection and closing state judgment method of the isolation switch is automatically switched to the backup detection method, where the backup detection method includes: current monitoring.

[0155] The similarity determination method provided in the embodiment of the present application determines the motion change similarity representing the similarity of the motion process through the standard motion change characteristics and the motion change characteristics. The motion change similarity can reflect the degree of proximity of the moving parts to the normal closing or opening of the disconnector in terms of dynamic changes such as instantaneous velocity, instantaneous acceleration and displacement change. By determining the motion similarity representing the overall similarity of the motion through the standard motion characteristics and the motion characteristics, the degree of conformity of the motion process with the normal closing or opening of the disconnector can be comprehensively evaluated. Combining the analysis of the motion change similarity and the motion similarity, the opening and closing state of the disconnector can be more accurately judged.

[0156] Figure 5 This is a schematic diagram of the structure of the disconnection state judgment device of the isolating switch provided in the embodiment of the present application. Figure 5 As shown, the disconnecting state judgment device 50 provided in this embodiment includes:

[0157] The acquisition module 501 is used to acquire the motion data and operation data of the moving parts in the isolating switch collected by the millimeter wave radar, and the operation data includes: opening and closing;

[0158] A processing module 502 is used to determine the actual motion trajectory of the moving component according to the motion data;

[0159] The processing module 502 is further used to determine the speed change characteristics and displacement change characteristics during the movement process according to the actual movement trajectory;

[0160] The determination module 503 is used to determine the opening and closing state of the disconnecting switch based on the opening and closing standard characteristics and operation data corresponding to the disconnecting switch according to the speed change characteristics and the displacement change characteristics.

[0161] In a possible implementation manner, the determination module 503 is specifically configured to:

[0162] Based on the disconnection and closing standard features and operation data corresponding to the disconnector, the corresponding standard features are obtained, wherein the standard features include: standard movement change features and standard movement features;

[0163] Determine the motion change similarity and motion similarity according to the standard feature, the speed change feature and the displacement change feature;

[0164] The opening and closing states of the disconnecting switch are determined based on the motion change similarity and the motion similarity.

[0165] In a possible implementation manner, the determination module 503 is further configured to:

[0166] Determine the motion change characteristics and movement characteristics according to the velocity change characteristics and the displacement change characteristics, wherein the motion change characteristics include: instantaneous velocity, instantaneous acceleration and displacement change, and the movement characteristics include: total displacement, maximum velocity, maximum acceleration and movement duration;

[0167] Determine the motion change similarity according to the standard motion change feature and the motion change feature;

[0168] The motion similarity is determined based on the standard motion features and the motion features.

[0169] In a possible implementation manner, the determination module 503 is further configured to:

[0170] Based on the dynamic time warping algorithm, the motion change similarity between the standard motion change feature and the motion change feature is determined.

[0171] In a possible implementation manner, the determination module 503 is further configured to:

[0172] The similarity of motion changes between the standard motion feature and the motion feature is determined by a similarity algorithm, wherein the similarity algorithm includes cosine similarity.

[0173] In a possible implementation manner, the determination module 503 is further configured to:

[0174] If the motion type is closing, determine the closing feature in the opening and closing standard feature as the corresponding standard feature;

[0175] If the motion type is opening, determine the opening feature in the opening and closing standard feature as the corresponding standard feature.

[0176] In a possible implementation manner, the determination module 503 is further configured to:

[0177] If the motion change similarity is greater than the motion change similarity threshold, and the motion similarity is greater than the motion similarity threshold, it is determined that the disconnector is normally opened and closed;

[0178] If the motion change similarity is less than or equal to the motion change similarity threshold, or the motion similarity is less than or equal to the motion similarity threshold, it is determined that the disconnector is abnormally opened or closed.

[0179] In a possible implementation manner, the processing module 502 is further configured to:

[0180] Doppler effect analysis is performed on the actual motion trajectory, and velocity change characteristics are obtained according to phase changes. The velocity change characteristics include instantaneous velocity and instantaneous acceleration.

[0181] The actual motion trajectory is reconstructed by displacement to determine the displacement change characteristics, which include the displacement change amount.

[0182] In a possible implementation manner, the processing module 502 is further configured to:

[0183] According to the motion data, filtering is performed to obtain first motion data after noise is eliminated;

[0184] According to the first motion data, a background elimination algorithm is adopted to determine the actual motion trajectory of the moving component.

[0185] In a possible implementation manner, the processing module 502 is further configured to:

[0186] Obtaining environmental information, including temperature data and vibration data;

[0187] Correct the motion data based on the compensation algorithm and environmental information;

[0188] According to the corrected motion data, the actual motion trajectory of the moving part is determined.

[0189] In a possible implementation manner, a self-check unit is deployed in the millimeter wave radar, and the processing module 502 is further used to:

[0190] When the millimeter-wave radar receives a self-test instruction, the self-test unit performs a self-test operation and obtains self-test data.

[0191] In a possible implementation manner, the determination module 503 is further configured to:

[0192] Based on the opening and closing standard characteristics and operation data corresponding to the disconnector, and according to the speed change characteristics and displacement change characteristics, an abnormal detection algorithm is used to determine the abnormal mode of the disconnector.

[0193] The device for judging the disconnection state of the isolating switch provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be described in detail here.

[0194] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 6 As shown, the electronic device 60 provided in this embodiment includes: at least one processor 601 and a memory 602. Optionally, the device 60 also includes a communication component 603. The processor 601, the memory 602 and the communication component 603 are connected via a bus 604.

[0195] In a specific implementation process, at least one processor 601 executes the computer execution instructions stored in the memory 602, so that at least one processor 601 executes the above method.

[0196] The specific implementation process of the processor 601 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0197] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in the invention may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0198] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0199] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the embodiments of the present application is not limited to only one bus or one type of bus.

[0200] An embodiment of the present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0201] An embodiment of the present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, any of the above methods is implemented.

[0202] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0203] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0204] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0205] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0206] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0207] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0208] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0209] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for judging the opening and closing state of an isolating switch, characterized in that: include: Acquire motion data and operation data of moving parts in the isolating switch collected by the millimeter wave radar, wherein the operation data includes: opening and closing; Determining the actual motion trajectory of the moving component according to the motion data; According to the actual motion trajectory, determining the velocity change characteristics and displacement change characteristics during the motion process; Based on the opening and closing standard characteristics and operation data corresponding to the isolating switch, the opening and closing state of the isolating switch is determined according to the speed change characteristics and the displacement change characteristics.

2. The method according to claim 1, characterized in that The determining the opening and closing state of the isolating switch based on the opening and closing standard characteristics and operation data corresponding to the isolating switch and according to the speed change characteristics and the displacement change characteristics includes: Based on the disconnection and closing standard features and operation data corresponding to the disconnector, corresponding standard features are obtained, wherein the standard features include: standard movement change features and standard movement features; Determining motion change similarity and motion similarity according to the standard feature, the speed change feature and the displacement change feature; The opening and closing states of the isolating switch are determined according to the motion change similarity and the motion similarity.

3. The method according to claim 2, characterized in that Determining the motion change similarity and the motion similarity according to the standard feature, the speed change feature and the displacement change feature includes: Determine a motion change feature and a movement feature according to the speed change feature and the displacement change feature, wherein the motion change feature includes: instantaneous speed, instantaneous acceleration and displacement change, and the movement feature includes: total displacement, maximum speed, maximum acceleration and movement duration; Determine the motion change similarity according to the standard motion change feature and the motion change feature; The motion similarity is determined based on the standard motion features and the motion features.

4. The method according to claim 3, characterized in that The determining of the motion change similarity according to the standard motion change feature and the motion change feature includes: Based on the dynamic time warping algorithm, the motion change similarity between the standard motion change feature and the motion change feature is determined.

5. The method according to claim 3, characterized in that: The determining of the motion similarity according to the standard motion feature and the motion feature includes: The similarity of motion changes between the standard motion feature and the motion feature is determined by a similarity algorithm, wherein the similarity algorithm includes cosine similarity.

6. The method according to claim 2, characterized in that The obtaining of the corresponding standard features based on the disconnection and closing standard features and operation data corresponding to the disconnector includes: If the motion type is closing, determine the closing feature in the opening and closing standard feature as the corresponding standard feature; If the motion type is opening, determine the opening feature in the opening and closing standard feature as the corresponding standard feature.

7. The method according to claim 2, characterized in that Determining the opening and closing state of the disconnector according to the motion change similarity and the motion similarity includes: If the motion change similarity is greater than the motion change similarity threshold, and the motion similarity is greater than the motion similarity threshold, it is determined that the disconnector is normally opened and closed; If the motion change similarity is less than or equal to the motion change similarity threshold, or the motion similarity is less than or equal to the motion similarity threshold, it is determined that the disconnecting and closing of the isolating switch is abnormal.

8. The method according to claims 1-7, characterized in that Determining the speed change characteristics and displacement change characteristics during the motion process according to the actual motion trajectory includes: Performing Doppler effect analysis on the actual motion trajectory, and obtaining velocity change characteristics according to phase changes, wherein the velocity change characteristics include instantaneous velocity and instantaneous acceleration; The actual motion trajectory is subjected to displacement reconstruction to determine displacement change characteristics, wherein the displacement change characteristics include a displacement change amount.

9. The method according to claims 1-7, characterized in that: Determining the actual motion trajectory of the moving component according to the motion data includes: According to the motion data, filtering is performed to obtain first motion data after noise is eliminated; According to the first motion data, a background elimination algorithm is used to determine the actual motion trajectory of the moving component.

10. The method according to claims 1-7, characterized in that Before determining the actual motion trajectory of the moving component according to the motion data, the method further includes: Obtaining environmental information, the environmental information including temperature data and vibration data; Correcting the motion data according to a compensation algorithm and the environmental information; The actual motion trajectory of the moving component is determined according to the corrected motion data.

11. The method according to claims 1-7, characterized in that The millimeter wave radar is equipped with a self-checking unit, including: When the millimeter-wave radar receives a self-test instruction, the self-test unit performs a self-test operation and obtains self-test data.

12. The method according to claims 1-7, characterized in that After determining that the disconnector is abnormal, the method further includes: Based on the opening and closing standard characteristics and operation data corresponding to the isolating switch, and according to the speed change characteristics and the displacement change characteristics, an abnormality detection algorithm is used to determine the abnormal mode of the isolating switch.

13. A device for judging the opening and closing state of an isolating switch, characterized in that: include: An acquisition module is used to acquire motion data and operation data of moving parts in the isolating switch collected by the millimeter wave radar, wherein the operation data includes: opening and closing; A processing module, used for determining an actual motion trajectory of the moving component according to the motion data; The processing module is further used to determine the speed change characteristics and displacement change characteristics during the movement process according to the actual movement trajectory; A determination module is used to determine the opening and closing state of the disconnecting switch based on the opening and closing standard characteristics and operation data corresponding to the disconnecting switch and according to the speed change characteristics and the displacement change characteristics.

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