A Method for Analyzing the Insulation Deterioration Trend of Zinc Oxide Arrester
A technology of degradation trend and analysis method, applied in the direction of instruments, dielectric strength testing, measuring devices, etc., can solve problems such as large data volatility, equipment failure, insulation performance degradation, etc., to ensure safe and reliable operation, improve reliability, The effect of efficient perception
Active Publication Date: 2022-03-18
福建和盛高科技产业有限公司
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[0002] Zinc oxide arrester is an important protection device for limiting overvoltage in the power grid. It can provide a certain protection margin for important electrical equipment. The reliability of its operation is related to the stable operation of the power grid, but the arrester has been subjected to system voltage, overvoltage, pollution , internal moisture and other factors, the insulation performance will gradually deteriorate, which may lead to equipment failure, affecting the safety and stability of the power system and the reliability of power supply. Influenced by factors such as the operating environment, data volatility is large, and it is difficult to judge the trend of monitoring data changes. Currently, the processing and analysis of online monitoring data is relatively mature, and the accumulated mass can be fully utilized. Big data processing framework, mathematical morphology filtering, and EMD algorithm can be applied , effectively carry out the analysis of the deterioration trend of the arrester insulation, realize the rapid perception of the change trend of the arrester insulation, and on this basis, the power supply reliability of the power grid equipment has become very urgent
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[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0036] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0037] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...
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The invention relates to a method for analyzing the insulation deterioration trend of a zinc oxide arrester. The on-line monitoring data of the arrester, the basic ledger data, and the temperature and humidity data are obtained, and the obtained data is cleaned, and then the cleaned data is processed through mathematical morphology denoising, which is effective. Eliminate signal noise while retaining the global and local characteristics of the original signal to improve the reliability of online monitoring data. Then, through EMD analysis, extract each modal component in the data signal and the central trend component of the original signal representing the data, and then obtain from the central trend component Each inflection point of the curve, further according to the data change rate alarm upper and lower limits and the data change rate between adjacent outer points, determine the data change trend between adjacent inflection points, and finally combine the change trends of adjacent inflection points to obtain the arrester monitoring data change trend, and According to the insulation deterioration alarm factor of the arrester, an insulation deterioration trend alarm is issued to realize the efficient perception of the insulation failure of the arrester and ensure the safe and reliable operation of the power grid.
Description
technical field [0001] The invention relates to the technical field of electric power safety, in particular to a method for analyzing the insulation deterioration trend of a zinc oxide arrester. Background technique [0002] Zinc oxide arrester is an important protection device for limiting overvoltage in the power grid. It can provide a certain protection margin for important electrical equipment. The reliability of its operation is related to the stable operation of the power grid, but the arrester has been subjected to system voltage, overvoltage, pollution , internal moisture and other factors, the insulation performance will gradually deteriorate, which may lead to equipment failure, affecting the safety and stability of the power system and the reliability of power supply. Influenced by factors such as the operating environment, data volatility is large, and it is difficult to judge the trend of monitoring data changes. Currently, the processing and analysis of online ...
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IPC IPC(8): G01R31/12
CPCG01R31/1236
Inventor 郑作霖陈太陈亮齐瑞林捷
Owner 福建和盛高科技产业有限公司