由于新能源的广泛应用和电力电子设备的迅速增长，电力系统谐波越来越被关注，精确有效的谐波分析方法研究具有实际意义。基于小波包变换的良好局部性，小波包变换广泛应用于谐波分析，重点分析了小波函数的选取和分解层数的确定。通过仿真，得到了基于小波包变换谐波分析方法的最优小波函数与分解层数：选用小波函数sym35对谐波信号进行5层分解，得到的谐波分析结果通常是比较理想的。%For the wide application of new energy and the rapid growth of power electronic equipment , more and more attention are paid to power system harmonic , so research on accurate and efficient harmonic analysis method has prac-tical significance.Based on the good locality of the wavelet packet transform (WPT), WPT is widely applied in har-monic analysis .In this paper , we focus on the selection of wavelet function and confirmation of decomposition level . The simulation shows the best wavelet function and decomposition level , and we can come to a conclusion that the har-monic analysis effect is best when using wavelet function sym 35 and decomposing in five levels .
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