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《Electrical Measurement & Instrumentation》 2005-09
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Frequency Estimation and Tracking for Harmonics Analysis of Power Systems

WANG Bo-lin,HUANG Ting-bo(School of Electric Engineering,Hohai University,Nanjin 210098,China)  
In this paper,a set of formulas for frequency estimation of multiple frequency signal is deduced and a method of frequency estimation and tracking fo r harmonics analysis of power systems is developed. The set of formulas consists of DFT of sampled data,phase difference calculation and frequency calculation. Frequency tracking means that sampling intervals of following sampling is updat ed according to new frequency estimation,so the synchronous sampling error will be reduced step by step. The method can provide very high accurate for real tim e harmonics analysis of power signal and it's computation is very simply. Matla b simulations show efficiency of the method.
【CateGory Index】: TM711
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