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《Insulators and Surge Arresters》 2009-03
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Power System Harmonics Measurement Window Interpolation Algorithm and the Realization with Matlab

FANG Lei,WANG Ying-jian,ZHANG Yu-huan(College of Electric & Information Engineering,Changsha University of Science & Technology,Changsha 410077,China)  
FFT(Fast Fourier Transform)is a method that applies most extensively of the harmonic measurements.However,if FFT is used directly to harmonic measurement there will be a larger error that affects the accuracy of harmonic analysis.Some efforts have been made to correct the accuracy of frequency,phase and amplitude measured by FFT,including the utilization of window functions and interpolation algorithms.the principle of power grid harmonic detecting non-synchronous sampling window interpolation algorithm was described,based on window function and interpolation algorithms.The results of MATLAB simulation show that the FFT window interpolation algorithm has advantage of high accurate inspection,easy implementation,and various functions;at the same time,also verified the effectiveness and easy implementation of improved algorithm.
【CateGory Index】: TM744
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