通过实验表明小波包变换能精确地从谐波信号中分离出基波，并能根据需要分离出任意谐波信号，是一种很好的电力系统谐波分析工具。-Experiments show that wavelet packet transform can accurately isolated in harmonic signal wave, and can according to need to separate out any harmonic signals,It is a kind of very good pow