Method and device for evaluating operation state of electric meter

Abstract

The invention belongs to the technical field of electric power metering and inspection and particularly relates to a method and device for evaluating an operation state of an electric meter. The method is characterized in that firstly, unified pre-processing of each indicator data of an electric meter is performed to complete characterization of time series data; secondly, the real-time separationwindow technology is utilized to integrate the time series data, based on the random matrix theory, real-time calculation and analysis of statistical time-series characteristics of the multi-dimensional meter time series data are performed; thirdly, the DTW clustering algorithm is utilized to calculate similarity of the time series data, so the random matrix statistics are clustered and ranked; and lastly, the clustering result is analyzed to obtain the range of the electric meter operation state evaluation level, and real-time operation state evaluation of the electric meter is completed. The method is advantaged in that states are classified not dependent on scores but on similarity between sequences, good noise resistance and timeliness are achieved, state intervals can be more accurately divided, moreover, spatiotemporal characteristics of the data have better applicability.

Description

technical field [0001] The invention belongs to the technical field of electric power measurement and inspection, and in particular relates to a method and an evaluation device for evaluating the operating state of an electric energy meter. Background technique [0002] With the continuous development of the scale of the intelligent power distribution network, the continuous expansion of the power supply area and the continuous improvement of the intelligence of the meter, the coverage of the information collection system of the smart meter is gradually increasing, and the amount of inspection and monitoring data during the operation of the power grid is exponential. magnitude growth. As a result, the operating state of the electric energy meter also presents more complex and sudden characteristics. At present, for the evaluation and disposal of the operating state of the electric energy meter, the power company mainly judges the operating state of the electric energy meter...

AI Technical Summary

Problems solved by technology

The algorithms in the prior art are relatively single, and cannot analyze and process data comprehensively from the whole to the part. In addition, the shortcomings in calculation accuracy, robustness, reliability, and timeliness are obvious.

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