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《Proceedings of the CSU-EPSA》 2006-04
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New Algorithm for Measuring Frequency of Power System Based on Fourier Filter

LI Yi-quan~1,HE Ben-teng~2(1.Guangdong Power Dispatch Center,Guangzhou 510600,China;2.School of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)  
Focusing on the information of sine signals processed by Fourier algorithm,it is detected that with the shifting of the data window the real part and imaginary part of the phasor gained from Fourier algorithm satisfy an identical equation. Thereby a new method of frequency measurement is proposed,by which we can accurately obtain fundamental frequency in about 20ms.In the end,signals with changing frequency,with and without harmonics are tested respectively,and the results prove a higher accuracy of the algorithm in all situations.
【CateGory Index】: TM935.1
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