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.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2008年第23期23-26,31,共5页
Power System Protection and Control
关键词
电力系统
小波变换
小波混叠
谐波检测
power system
wavelet transform
wavelet aliasing
harmonic detection
