基于小波包变换的电力系统谐波分析的研究  

Research on Analysis of the Power System Harmonic Based on Wavelet Packet Transform

作　　者：上官同英[1] 杨际峰[2] 

机构地区：[1]中州大学工程技术学院,郑州450015 [2]黄淮学院电子科学与工程系,河南驻马店463000

出　　处：《河南科学》2012年第8期1050-1053,共4页Henan Science

基　　金：河南省科技厅科技发展计划项目(112102210348)

摘　　要：为了防止谐波对电力系统和用电设备的危害,分别用小波变换和小波包变换对电力系统谐波进行分析.仿真结果表明二者都能将基波从电流信号中正确地提取出来.而小波包变换比小波变换能够分解出更加丰富的谐波信号,利用小波包变换分解的各次谐波频率和幅度的误差率完全符合谐波分析的精度要求.In order to prevent the harmfulness of harmonics to the power system and power equipment,the wavelet transform and wavelet packet transform are used respectively to analyze the harmonics of power system. The simulation results show that both the wavelet transform and wavelet packet transform can exactly extract the fundamental wave from current signal. The wavelet packet transform can decompose more abundant harmonic signals than the wavelet transform. The error rates of each harmonic frequency and amplitude completely correspond with the accuracy requirement of harmonic analysis by the wavelet packet transform.

关 键 词：小波变换 小波包变换 谐波分析 电力系统 

分 类 号：TM711[电气工程—电力系统及自动化]