Harmonic detection based on Hanning window imterpolation FFT algorithm
Nowadays the existence of harmonic produced by various harmonic sources have a great influence on the quality of power supply.The window functions and interpolation algorithms are utilized to correct the measured frequrency,phase and amplitude by FFT.This article is based on FFT,the principle of the window function and interpolation correction algorithm to verify the superiority of the FFT fristly.Then,given based on the interpolation coefficients formula of the Hanning window.Matlab simulation based on the characteristics of the different window functions were analyzed to verify the validity of the algorithm.Finally analyzed the characteristics of the Hanning window,verify the practicality of the Hanning windowed interpolation FFT harmonic analysis.
Fast Fourier TransformerHanning WindowHarmonic Analysis
NETL
NSTL
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