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Method and device for evaluating operation state of electric meter

A technology for operating status and evaluating devices, which is applied to measuring devices, measuring electrical variables, character and pattern recognition, etc., and can solve problems such as single algorithm, calculation accuracy, robustness, reliability, and timeliness, and inability to analyze and process data, etc. question

Active Publication Date: 2019-11-22
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Abstract
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  • Application Information

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.

Method used

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  • Method and device for evaluating operation state of electric meter
  • Method and device for evaluating operation state of electric meter
  • Method and device for evaluating operation state of electric meter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0171] Select 100 electric energy meters (n=100) of the same batch for analysis, and the selected indicators are current phase angle, voltage phase angle, electric power, voltage, current, electric energy, frequency fluctuation, power factor, power direction and load current10 indicators (v=10), where the data includes normal electric energy meter measurement data and abnormal electric energy meter data. This example analysis is based on the analysis of 96 points of daily sampling data (Ti=15min). In order to reflect the time series characteristics of data characteristics and make full use of historical data characteristics, set the time series interval whose moving distance is smaller than the moving window, that is, the window w size is 100 ×4, the moving distance is 2, and the moving times are 1000 times. Based on the proposed evaluation method, the single-ring law, M-P law analysis, and LES calculation, clustering, and state analysis are sequentially performed on the time-...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04G06K9/62
CPCG01R35/04G06F18/23
Inventor 杜杰程瑛颖张家铭周全侯兴哲肖冀张晓勇冯凌黄磊李刚谭时顺周峰胡建明
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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