从白噪声中提取局部放电信号的小波变换方法研究

The Method of Drawing the PD Signals from White Noise by Wavelet Analysis

在分析局部放电在线监测中局部放电信号及白噪声特征的基础上，提出了用自相关函数的小波变换方法从白噪声中提取局部放电信号；通过对去噪后局部放电信号自相关函数特征的分析，提出了从小波反变换后的自相关函数中提取局部放电信号的方法。

We analyze the characteristics of white noise and PD signal in PD monitoring on line The method that PD signal is drawn from white noise by using the wavelet transform of self-correlation function is presented The characteristics of rejected noise self-correlation function is also studied The method of drawing PD signal finger print from self-correlation function after the inverse wavelet transform is presented