Title :
Truncation effects of FFT on estimation of dynamic harmonics in power system
Author :
Chang, Yong N. ; Hsieh, Yao C. ; Moo, Chin S.
Author_Institution :
Dept. of Electr. Eng., Nat. Huwei Inst. of Technol., China
Abstract :
This paper investigates the truncation effects of the fast Fourier transform (FFT) on harmonic estimation in the power system. Special efforts are concentrated on the voltage and the current with time-varying waveforms. The effects on the time response of the dynamic harmonic estimation are discussed. An overlap truncation method is proposed to achieve a faster response. A full-converter fed DC drive is used as an example to illustrate the implementation of the overlap truncation method and group-harmonic identification for dynamically evaluating the harmonic distortion of a power system
Keywords :
DC motor drives; fast Fourier transforms; harmonic distortion; power convertors; power system harmonics; power system parameter estimation; FFT; current waveforms; dynamic harmonic estimation; dynamic harmonics estimation; fast Fourier transform; full-converter fed DC drive; group-harmonic identification; harmonic distortion; overlap truncation method; power system; time response; time-varying waveforms; truncation effects; voltage waveforms; Drives; Fast Fourier transforms; Frequency; Harmonic distortion; Power system analysis computing; Power system dynamics; Power system harmonics; Time factors; Time varying systems; Voltage;
Conference_Titel :
Power System Technology, 2000. Proceedings. PowerCon 2000. International Conference on
Conference_Location :
Perth, WA
Print_ISBN :
0-7803-6338-8
DOI :
10.1109/ICPST.2000.898132
