摘要
在此阐述了小波变换及小波包变换的基本原理。小波包变换是建立在小波变换的基础上,可以实现对信号的均匀划分,能够更好地提取信号的时频特性。仿真结果表明,小波包变换方法能够正确地提取电力系统的谐波信号,将电流信号中的基波分量和高次谐波分量分离,验证了该方法的有效性。
The principles of wavelet transform and wavelet packet transform are presented. The wavelet packet transform is based on wavelet transform. It can realize uniform partition of a signal, and extract time-frequency characteristics of signal well. The simulation result shows that the wavelet packet transform method can exactly extract the harmonic signal of power system and can separate the fundamental harmonic and high-order harmonic components in current signal. The method is effective.
出处
《现代电子技术》
北大核心
2015年第5期62-63,67,共3页
Modern Electronics Technique
基金
2014年度江苏省高等学校"青蓝工程"项目(苏教师【2014】23号)
关键词
小波包变换
谐波电流检测
电力系统
仿真分析
wavelet packet transform
harmonic current detection
power system
simulation analysis
