小波包变换在电网谐波检测中的应用研究  

Application of Wavelet Package Transform in Power Grid Harmonic Detection

作　　者：冯新民[1] 

机构地区：[1]南通供电公司,江苏南通226006

出　　处：《机械工程与自动化》2011年第4期160-162,共3页Mechanical Engineering & Automation

基　　金：南通市应用研究计划项目(K2008037)

摘　　要：随着非线性负荷用户的不断增加,大量谐波注入电网,使得电力系统电压、电流波形偏离正弦波形发生畸变。运用小波包变换分析了电网系统谐波信号,根据信号特性,选取合适的小波函数,确定了小波包变换的分解层数,并通过仿真实验验证了小波包分析方法在电网谐波检测中的正确性和实用性。The increase of users using non-linear loads leads to a large number of harmonic injecting power grid.The voltage and current waveforms in power system are deviated from the sinusoidal waveform.This paper analysed electric system harmonic signal by wavelet packet transform,and adaptively selected the optimal decomposition level of wavelet transformation according to the characteristics of signal.The correctness and practicability of wavelet method in power grid harmonic detection is validated by a simulation experiment.

关 键 词：小波包变换 谐波检测 电能质量 

分 类 号：TN911.6[电子电信—通信与信息系统]