基于小波变换抗混叠谐波检测的一种新方法  

A novel method for anti-aliasing harmonic detection based on wavelet transform

作　　者：陈长升[1] 黄险峰[1] 

机构地区：[1]江门市五邑大学信息学院,广东江门529020

出　　处：《电力系统保护与控制》2008年第23期23-26,31,共5页Power System Protection and Control

摘　　要：通过分析小波混叠本质,推导出基于小波变换的谐波检测算法,该算法改善了谐波检测过程中的混叠现象。通过Matlab仿真实验表明本文方法有较好的抗混叠效果,有利于进行电力系统谐波信号精确分析。该算法实现比较简单,是一种新的快速抗混叠方法,具有一定的实用价值。The physical essence of aliasing phenomenon in wavelet transform is analysed, and harmonic detection algorithm based on wavelet transform is proposed. This algorithm can reduce aliasing phenomenon during harmonic detecting. Simulation result proves that this method can effectively prevent aliasing and can be used to accurately analyse harmonic for power system. It is useful and can be carded out expediently.

关 键 词：电力系统 小波变换 小波混叠 谐波检测 

分 类 号：TM76[电气工程—电力系统及自动化]