CN-122020224-A - Dynamic decoupling method and system for abnormal load of electric energy meter based on multi-physical field coupling

CN122020224ACN 122020224 ACN122020224 ACN 122020224ACN-122020224-A

Abstract

The invention relates to the technical field of electric energy meter testing, in particular to an electric energy meter abnormal load dynamic decoupling method and system based on multi-physical field coupling, wherein the method dynamically determines an abnormal load decoupling scheme by acquiring multi-physical field coupling strength information in the electric energy meter testing process; the method comprises the steps of collecting operation data of each load measurement channel, constructing a load response characteristic matrix reflecting dynamic response characteristics of the channels, calculating coupling interference parameters of each channel according to the load response characteristic matrix, quantifying the interference degree of each channel, carrying out cluster analysis on the coupling interference parameters by adopting a spectral clustering algorithm, effectively identifying load channels with similar abnormal coupling behaviors, extracting abnormal interference load cluster, realizing accurate positioning and dynamic decoupling of the abnormal coupling channels according to the cluster, improving the anti-interference capability and metering accuracy of the electric energy meter under complex working conditions, and enhancing the stability and reliability of system operation.

Inventors

XIE YUANWEN
YANG JUEXIAN
WANG JING
ZENG ZHIHONG
WANG KE
CHEN KAILIANG
Jiang Gengzhen

Assignees

广东博立科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260130

Claims (10)

1. The utility model provides an electric energy meter abnormal load dynamic decoupling method based on many physics field couplings which characterized in that, the method includes: Acquiring multi-physical field coupling strength information in the electric energy meter test process, and determining a abnormal load dynamic decoupling scheme of the electric energy meter according to the multi-physical field coupling strength information; acquiring operation data of each load measurement channel of the electric energy meter in a dynamic decoupling process, constructing a load response characteristic matrix according to the operation data, and calculating coupling interference parameters of each channel according to the load response characteristic matrix; clustering the coupling interference parameters based on a spectral clustering algorithm, and extracting an abnormal interference load cluster; And positioning and decoupling the abnormal coupling channel in the abnormal load testing process of the electric energy meter according to the abnormal interference load cluster.
2. The method for dynamically decoupling abnormal load of electric energy meter based on multi-physical field coupling according to claim 1, wherein the step of obtaining multi-physical field coupling strength information in the test process of the electric energy meter and determining the dynamic decoupling scheme of abnormal load of the electric energy meter according to the multi-physical field coupling strength information comprises the following steps: The method comprises the steps of obtaining a preset number of standard electric energy meters to input to a target test platform for pre-test operation, and obtaining test output data of multiple physical field sensors in the pre-test process, wherein the test output data comprise electromagnetic field interference intensity, thermal field distribution data, mechanical vibration signals and electric energy meter voltage and current output characteristics; performing stability analysis on the voltage and current output characteristics to determine waveform integrity and abrupt change characteristics of an output signal; Determining abnormal sampling frequency of each load measurement channel according to the waveform integrity and the abrupt change characteristics, and carrying out data acquisition quality assessment on each load measurement channel according to the abnormal sampling frequency to obtain data acquisition quality data; Performing correlation analysis on the data acquisition quality data and the electromagnetic field interference intensity and thermal field distribution data to determine multi-physical field coupling intensity information; and acquiring load handling capacity information of a single electric energy meter test, determining the number of dynamically decoupled load channels according to the load handling capacity information and the multi-physical field coupling strength information, and constructing a dynamic decoupling scheme of the abnormal load.
3. The method for dynamically decoupling abnormal load of electric energy meter based on multi-physical field coupling according to claim 1, wherein the steps of obtaining the operation data of each load measurement channel of the electric energy meter in the dynamic decoupling process, constructing a load response characteristic matrix according to the operation data, and calculating the coupling interference parameter of each channel according to the load response characteristic matrix comprise the following steps: Acquiring operation data of each load measurement channel of the electric energy meter in a dynamic decoupling process, wherein the operation data comprises a power sequence output by the channel, a sampling time stamp, a load mutation mark and corresponding temperature, electromagnetic field intensity and mechanical vibration working condition information; Extracting response characteristic information of each load measurement channel according to the operation data, and carrying out structural representation on the response characteristic information according to a time window to construct a load response characteristic matrix; According to response variation trends of all channels in the load response characteristic matrix in different time windows, dynamic time warping is carried out, and coupling interference components of all channels are extracted by calculating alignment errors of response curves among the channels; and carrying out weighted analysis on the coupling interference component and waveform distortion characteristics of the corresponding channel to obtain coupling interference parameters of each channel.
4. The method for dynamically decoupling a transaction load of an electric energy meter based on multi-physical field coupling as recited in claim 3, wherein the load response characteristic matrix comprises load power variation, sampling stability and waveform distortion characteristics.
5. The method for dynamically decoupling abnormal load of electric energy meter based on multi-physical field coupling according to claim 4, wherein said obtaining the operation data of each load measurement channel of the electric energy meter during the dynamic decoupling process further comprises: acquiring power sequence signals of all load measurement channels, performing Hanning window processing on each channel signal, and then performing fast Fourier transformation to generate frequency spectrum data; positioning the first N frequency components with the largest energy ratio in the frequency spectrum data as reference frequency points, and expanding a preset frequency bandwidth to two sides by taking each reference frequency point as a center to form a detection frequency band; Scanning spectral lines with amplitude values exceeding the noise base level in each detection frequency band, and calibrating the spectral lines as abnormal spectral peaks when the difference between the spectral line frequency and a reference frequency point is an integer multiple relation and the amplitude value of the spectral line is larger than the preset multiple of the amplitude values of the left and right adjacent frequency points; If the proportion of the abnormal spectral peak energy to the total energy of the channel is in a predefined proportion interval, recording the corresponding time period of the channel as a verification interval to be coupled; Calculating normalized cross-correlation coefficient matrixes between every two of all channel power sequence signals, and extracting channel pairs with physical spacing smaller than a preset distance threshold as channel pairs to be analyzed; For each channel pair to be analyzed, fixing a first channel signal and sliding the time offset of a second channel signal, and determining the time offset when the cross correlation coefficient reaches the maximum value; Counting the actual time offset of each time point in the interval to be verified, and when the deviation of the actual time offset relative to the maximum time offset obtained by sliding calculation exceeds a preset tolerance and the frequency of jumping in the deviation direction reaches a preset frequency, judging that the load measuring channel has multi-physical field coupling interference in the interval to be coupled verification, and outputting a coupling interference interval of the operation data of each load measuring channel; And optimizing an acquisition section of the operation data according to the coupling interference interval.
6. The method for dynamically decoupling abnormal load of electric energy meter based on multi-physical field coupling according to claim 1, wherein the clustering operation is performed on the coupling interference parameters based on a spectral clustering algorithm, and the extracting of the abnormal interference load cluster comprises the following steps: Calculating the similarity of coupling interference parameters between load measurement channels based on a radial basis function, constructing a similarity matrix, and calculating a similarity matrix according to the similarity matrix; Constructing a normalized Laplace matrix based on the similarity matrix and the degree matrix, performing feature decomposition on the normalized Laplace matrix, and extracting feature vectors corresponding to the first k minimum feature values; Combining the feature vectors to form a feature vector matrix, randomly selecting k vectors from row vectors of the feature vector matrix as initial clustering center points, calculating Euclidean distances from all the row vectors to the clustering center points, and distributing each row vector into a category corresponding to the closest clustering center point; Calculating the average value of the row vector coordinates in each category to obtain a new clustering center point position, and repeatedly executing the distance calculation, vector allocation and center point updating processes until the clustering center point position is not changed any more to obtain k clustering clusters; And calculating the average value of the coupling interference parameters in each cluster, and identifying the cluster with the highest average value as an abnormal interference load cluster.
7. The method for dynamically decoupling abnormal load of electric energy meter based on multi-physical field coupling according to claim 1, wherein the positioning and decoupling the abnormal coupling channel in the abnormal load testing process of the electric energy meter according to the abnormal interference load cluster comprises the following steps: Extracting all load measurement channel identification information contained in the cluster according to the abnormal interference load cluster, and positioning an abnormal coupling channel according to the load measurement channel identification information; Acquiring load equipment correspondingly connected with an abnormal coupling channel, calibrating the load equipment as abnormal load equipment, and reallocating a load measurement channel for the abnormal load equipment; calculating the redistributed coupling interference parameters based on the multi-physical field coupling model, and determining that the decoupling is successful when the coupling interference parameters are lower than a preset threshold value; and when the coupling interference parameter is still higher than the preset threshold value, adjusting the multi-physical-field shielding parameter and repeatedly executing the decoupling process until the coupling interference parameter is lower than the preset threshold value.
8. An electric energy meter abnormal load dynamic decoupling system based on multi-physical field coupling, which is characterized by comprising: the coupling perception module is used for acquiring multi-physical field coupling strength information in the electric energy meter test process and determining a dynamic decoupling scheme of the abnormal load of the electric energy meter according to the multi-physical field coupling strength information; The characteristic modeling module is used for acquiring the operation data of each load measurement channel of the electric energy meter in the dynamic decoupling process, constructing a load response characteristic matrix according to the operation data, and calculating the coupling interference parameter of each channel according to the load response characteristic matrix; the clustering identification module is used for carrying out clustering operation on the coupling interference parameters based on a spectral clustering algorithm and extracting an abnormal interference load cluster; And the decoupling positioning module is used for positioning and decoupling the abnormal coupling channel in the abnormal load testing process of the electric energy meter according to the abnormal interference load cluster.
9. An electric energy meter abnormal load dynamic decoupling device based on multi-physical field coupling, which is characterized in that the device comprises a memory, a processor and an electric energy meter abnormal load dynamic decoupling program based on multi-physical field coupling, wherein the electric energy meter abnormal load dynamic decoupling program is stored on the memory and can run on the processor, and the electric energy meter abnormal load dynamic decoupling program based on multi-physical field coupling is configured to realize the steps of the electric energy meter abnormal load dynamic decoupling method based on multi-physical field coupling according to any one of claims 1 to 7.
10. A computer readable storage medium, wherein the computer readable storage medium stores therein a multi-physical field coupling based dynamic decoupling program for abnormal load of an electric energy meter, and the multi-physical field coupling based dynamic decoupling program for abnormal load of an electric energy meter realizes the steps of the multi-physical field coupling based dynamic decoupling method for abnormal load of an electric energy meter according to any one of claims 1 to 7 when executed by a processor.

Description

Dynamic decoupling method and system for abnormal load of electric energy meter based on multi-physical field coupling Technical Field The invention relates to the technical field of electric energy meter testing, in particular to an electric energy meter abnormal load dynamic decoupling method and system based on multi-physical field coupling. Background With the rapid development of smart grids and precise electricity management systems, electric energy meters are used as core equipment for electric energy metering and load monitoring, and the measurement accuracy and the operation stability of the electric energy meters face higher requirements. In an actual running environment, the electric energy meter is often under complex working conditions of coexistence of various physical fields such as an electromagnetic field, a thermal field, mechanical vibration and the like, coupling effects are easy to generate among different physical fields, unexpected interference occurs among load measurement channels, and problems such as signal crosstalk, waveform distortion, sampling distortion and the like are caused. In particular, under the abnormal load scene of parallel access of multiple loads and frequent abrupt change of loads, the coupling effect of multiple physical fields is further amplified, and electric energy metering deviation, harmonic misjudgment and even system protection misoperation can be caused when the coupling effect is serious. The existing electric energy meter testing and decoupling method is mainly focused on compensation or static interference suppression of a single physical field, and lacks modeling and analysis capability of a dynamic coupling mechanism of multiple physical fields. The traditional method generally adopts a fixed shielding structure or an empirical filtering algorithm, and is difficult to adapt to dynamic interference evolution under complex working conditions, so that the decoupling effect is limited. In addition, the prior art relies on threshold comparison or correlation analysis in the aspect of abnormal load channel identification, lacks deep clustering and pattern mining of inter-channel coupling behaviors, and is difficult to accurately locate hidden anomalies caused by multi-field coupling. The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art. Disclosure of Invention The invention mainly aims to provide a dynamic decoupling method and system for abnormal load of an electric energy meter based on multi-physical field coupling, and aims to solve the technical problems that the existing electric energy meter is difficult to effectively model and decouple due to dynamic interference caused by multi-physical field coupling under complex working conditions, so that signal crosstalk and metering deviation occur between load measurement channels, and the traditional method lacks the capability of dynamic analysis of a coupling mechanism and accurate identification of abnormal channels. In order to achieve the above purpose, the present invention provides a method for dynamically decoupling abnormal load of an electric energy meter based on multi-physical field coupling, the method comprising: Acquiring multi-physical field coupling strength information in the electric energy meter test process, and determining a abnormal load dynamic decoupling scheme of the electric energy meter according to the multi-physical field coupling strength information; acquiring operation data of each load measurement channel of the electric energy meter in a dynamic decoupling process, constructing a load response characteristic matrix according to the operation data, and calculating coupling interference parameters of each channel according to the load response characteristic matrix; clustering the coupling interference parameters based on a spectral clustering algorithm, and extracting an abnormal interference load cluster; And positioning and decoupling the abnormal coupling channel in the abnormal load testing process of the electric energy meter according to the abnormal interference load cluster. Optionally, the acquiring multi-physical field coupling strength information in the electric energy meter testing process, and determining the abnormal load dynamic decoupling scheme of the electric energy meter according to the multi-physical field coupling strength information, includes: The method comprises the steps of obtaining a preset number of standard electric energy meters to input to a target test platform for pre-test operation, and obtaining test output data of multiple physical field sensors in the pre-test process, wherein the test output data comprise electromagnetic field interference intensity, thermal field distribution data, mechanical vibration signals and electric energy meter voltage and current output characteristi