摘要
提出了一种基于小波包变换的电力谐波检测方法。该方法采用小波包变换对电流信号进行分解,即将该电流信号分解成低频部分与高频部分,然后分别对低频部分及高频部分进行小波包分解,重构后得到该电流信号的基波分量,从原始电流信号中减去基波分量,从而得到该电流信号的谐波分量。仿真结果表明,该方法能够很好地检测出电流信号中的谐波分量,并且能对指定频率的谐波进行检测。
The paper proposed a detection method of power harmonic based on wavelet packet transform.The method uses wavelet packet transform to decompose current signal, namely the current signal is departed into low-frequency part and high-frequency part,then respectively makes wavelet packet decomposition for the low-frequency part and the high-frequency part and gets fundamental component of the current signal after reconstruction.The fundamental component is subtracted from the original current signal so as to get harmonic component of the current signal.The simulation result showed that the method can detect harmonic component of current signal well and can detect harmonic of certain frequency.
出处
《工矿自动化》
2010年第6期67-70,共4页
Journal Of Mine Automation
基金
甘肃省自然科学基金项目(2007GS04834)
关键词
电力系统
谐波检测
小波包变换
重构算法
power system
harmonic detection
wavelet packet transform
reconstruction algorithm
