局部放电在线监测中典型干扰信号的处理方法  

The Method for Eliminating Typical Interference in Partial Discharge Monitoring System

作　　者：吴治国[1] 杨峰[1] 

机构地区：[1]华中科技大学水电与数字化工程学院,湖北武汉430074

出　　处：《湖北电力》2007年第2期7-9,共3页Hubei Electric Power

摘　　要：通过对周期性窄带干扰和高斯白噪声两种典型局部放电干扰信号的特性分析,分别采用传统傅立叶分析法和小波包变换法进行降噪处理。并用计算机进行仿真研究,同时与其他方法相比较,发现降噪性能稳定,适应性强,信噪比得到显著提高。Two methods, traditional Fourier analysis and wavelet packet transform, are presented for the characteristics of periodical narrow band .interference and Gauss white noise in partial discharge to eliminate the two kinds of interferences. Computer simulator calculation by contrasting to other methods can find the resuits that the effect is stable and with strong adaptability,and the SNR（Signal Noise Ratio） can be improved markedly.

关 键 词：局部放电 窄带干扰 高斯白噪声 傅立叶变换 小波包变换 香农熵 

分 类 号：TM421[电气工程—电器]