摘要
间谐波是电力系统中一种特殊的谐波,它大量存在于电网中。间谐波对电网危害大,所以对它进行监测和分析具有重要的意义。针对基于傅里叶变换(DFT)的间谐波分析方法易受噪声干扰和对间谐波分辨率低的缺点,提出了一种基于小波变换的间谐波分析方法。仿真结果表明,该方法具有高分辨率特性,可以很好地分析间谐波。在电力系统间谐波分析方面具有经典DFT方法无可比拟的优越性。
Inter-harmonics are special harmonics in power systems.They widely exist in power grids.Because the inter-harmonics bring severe harm to power grid,detect-ing and analyzing inter-harmonics is significant.The method to analyze inter-harmonics by using wavelet transform is proposed to overcome the shortcomings of DFT based method,such as sensitive to noise and inaccurate performance in inter-harmonic analysis.The simulation results show that the proposed method provides super-resolution ability,it is superior to the classic DFT method,and can be used for inter-harmonic analysis in power system.
出处
《电子质量》
2010年第6期13-14,18,共3页
Electronics Quality
关键词
电力系统
小波变换
间谐波
Power system
Wavelet transform
Inter-harmonics
