摘要
针对快速傅里叶变换(FFT)在电力谐波分析方面的不足,通过对模拟的短时谐波信号进行经验模态分解(EMD),对获取的谐波信号的本征模态函数(IMF)进行分析,得出了各次谐波的频率、幅值和作用时间,并应用此方法对单相交流逆变电源输出电压波形畸变进行分析,得出了畸变原因.分析结果表明:EMD方法对非平稳信号的分析具有较好的效果.
Based on the shortage of Fast Fourier Transform（FFT） analyzing power harmonic,through simulating short-term harmonic signal based on empirical mode decomposition（EMD） to obtain the harmonic signal of intrinsic mode functions（IMF） analysis,the frequency,amplitude and time of all the harmonics was obtained.This method was apply to analyze the single-phase inverter output voltage waveform distortion,and distortion cause was obtained.Analysis showed that the EMD method has a good result in non-stationary signal analysis.
出处
《河南科技学院学报（自然科学版）》
2012年第2期63-66,共4页
Journal of Henan Institute of Science and Technology(Natural Science Edition)
