摘要
局部放电信号中的白噪声给局放信号的后续处理带来了很大的困难 ,白噪声的剔除是局部放电信号处理中的一个不可缺少的环节。虽然有很多剔除白噪声的方法 ,但是大都不是很适合局放信号的处理。局部放电信号和白噪声有着不同的Lipschitz指数 ,经过小波变换后二者在时间—尺度平面上有不同特征。据此 ,文中提出了一种剔除白噪声的新方法 ,该方法运算简单 ,适合局放信号快速处理。处理后的局放信号不失真 ,而且剔除效果良好 。
The white noise of PD(partial discharge) signal brings great difficult to the PD signal's processing, so eliminating the white noise is a necessary section. There are many methods of eliminating white noise, but none of them are suitable to the PD signal processing. Because PD signal and white noise have different Lipschitz exponents and different wavelet transform features in time-scales, a new eliminating white noise method has been brought forward that has simple operation and meets the timing need of PD signal's processing. After the processing with this method, the PD signal is not distortion and the effect of eliminating white noise is very good. This method can be applied to the processing of PD signal gotten from the site.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第3期68-71,共4页
Journal of Chongqing University
