FFT在电力系统谐波分析中的应用与研究

his article describes the basic definition of Power System Harmonic (PSH) , then analyzes and researches on parameters of PSH consisting essentially of the calculation of harmonic coefficient and effective values through the Fast Fourier Transform (FFT) way.PSH is divided into three steps: the signal must be sampled, transformed into discrete sequence; establish the data window and ignore the signal wave after the data window; harmonic analysis method to analyze the data window though the harmonic analysis method . Finally, uses MATLAB software to simulate it. At last the paper compares the results which were got from the analysis of the FFT method and system analysis.