【摘要】 局部放电声信号对于检测电力电容器的绝缘特性有着重要意义。笔者采用声检测装置采集电力电容器局部放电声信号,并且分析了局部放电信号的特点,介绍了3类典型信号的特点和形成原因。同时应用了窄带滤波和小波降噪的方法来抑制噪声,取得了满意的效果。更多还原

【Abstract】 Acoustic signals of partial discharge are very important for detecting insulation characters in power capacitors.In this paper an acoustic detecting instrument is used to collect the acoustic signals of partial discharge in power capacitors,and characteristics of these signals are analyzed.Therefore,characteristics of three kinds of typical signals and reasons of their formation are introduced.At the same time,rejection of narrow-band wave and denoising using wavelet are introduced to reject noises.The outcome is satisfying.更多还原