变压器局放信号小波消噪最优分解层数研究

Research of Optimal Decomposition Level in Wavelet Denoising of PD Signals

介绍了小波域阈值消噪法中基于高频系数白化检验自适应确定分解层数方法的特点与不足,分析了分解层数不同时重构信号间的最小均方误差变化趋势,并据此对上述方法进行了改进。最后用该方法编程对变压器局部放电信号进行了分析,验证了算法的有效性。

Introduced wavelet threshold de-noising method based on high-frequency coefficients of decomposition level adaptively whitening method of testing the characteristics and shortcomings of the reconstructed signal decomposition level is not at the same time minimum mean square error between the trend and accordingly. The method was improved. Finally, the method of programming on the transformer partial discharge signal was analyzed to verify the validity of the algorithm.