绝缘子污秽放电声发射监测方法研究

Acoustic emission detection method monitoring insulator pollution flashover

提出了绝缘子污秽放电的声发射现象,通过监测声发射信号可以监测污秽绝缘子。介绍了声发射信号的监测原理及由超声传感器和后续处理电路组成的监测装置,进行了绝缘子污秽试验,采集了实际的声发射信号。从采集的声信号中提取特征量,建立声信号的数学模型。利用模糊推理方法对声信号的特征量进行处理,分析结果表明综合声信号的几个特征量可以有效判断绝缘子表面的污闪放电强弱,实现对绝缘子污秽放电的监测和预警。

Insulator pollution flashover is monitored using acoustic emission detection. Its principle is introduced. The monitoring device consists of supersonic transducer and reprocessing circuits. The insulator pollution flashover experiment is performed and real acoustic signals are collected,from which eigenvectors are picked up and mathematical model is built up. The eigenvectors are pro,cessed by fuzzy inference to effectively identify the flashover intensity on insulator surface,which is thus used to monitor and forewarn the flashover.