局放脉冲信号的三种小波去噪方法的研究

Research on three methods of wavelet denoising for impulse signals in partial discharge

介绍了三种小波去噪的方法:小波分解与重构法、非线性小波阈值法、小波模极大值法,分析了各自的特点和优劣。针对从高斯白噪声中提取的局部放电脉冲信号给出了仿真试验结果。为局部放电脉冲信号检测方法的选择提供了参考依据。

In this paper, three methods of wavelet denoising are introduced including the wavelet decomposition and reconstruction method, the nonlinear wavelet threshold denosing method,and wavelet transform modules maximum method. The characteristics, advantages and disadvantages of them are analyzed. To obtain PD impulse signals from Gaussian white-noise, the result of simulation trial is presented which can be helpful in selecting the method of testing impulse signals in partial discharge.