Power System Harmonic Analysis Based on Improved Hilbert-Huang Transform
To analyze harmonic accurately is significant to the stability of power system. HHT (Hilbert-Huang Transform) is adopted to analyze harmonic in order to overcome the shortcoming of FFT method and wavelet analysis method The power quality signals are decomposed by empirical mode decomposition (EMD) method, and then a series of intrinsic mode function (IMF) are obtained. Owing to different IMFs correspond to different harmonic, all harmonic amplitudes, frequencies and phases can be achieved via Hilbert transform (HT) plus Least Square fitting, to realize accurate analysis of power system harmonic. During the procession of EMD, Improved Extremum field Mean Mode Decomposition (IEMMD) and the piecewise Sinusoidal Interpolating are employed to reduce the end effect. In this way, only one Sine interpolating is required rather than two. HHT not only can get accurate harmonic component and time characteristic, but also have very strong adaptability and practicability to analyze real-time temporary signal.
IEMMD Sinusoidal Interpolating Harmonic Analysis.
Shi Zhang Qun Wang Ruirui Liu
Department of Electronic Information Engineering,Northeastern University Shenyang City,Liaoning Province,China
国际会议
2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)
北京
英文
3571-3575
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）