Research on Algorithm of Phase Difference Analysis Based on an Improved Windowed FFT

Bu Xin You; He Zhi Liu; Peng Tian; Jia Xu; Jing Bu

doi:10.4028/www.scientific.net/AMR.765-767.2399

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 765-767Research on Algorithm of Phase Difference Analysis...

Research on Algorithm of Phase Difference Analysis Based on an Improved Windowed FFT

Abstract:

Based on the small scale power system frequency fluctuation frequency leakage problems due to the FFT phase measurement error problem, this paper presents a high accuracy algorithm for phase difference measurement based on windowed discrete Fourier transform, the signal truncated using 4 order Blackman-Harris window, and corrects the phase correction method for discrete spectrum thus to calculate the phase difference. The algorithm for phase difference measurement theory and signal frequency independent, so there is no need to sample the signals of the whole cycle. A simple algorithm, less calculation, high precision, has strong inhibition on the harmonic and noise, simulation results verify the feasibility and effectiveness of the algorithm.

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Periodical:

Advanced Materials Research (Volumes 765-767)

Pages:

2399-2402

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.765-767.2399

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Online since:

September 2013

Authors:

Bu Xin You, He Zhi Liu, Peng Tian, Jia Xu, Jing Bu

Keywords:

4 Order B-H Window, Discrete Spectrum Correction, FFT, Phase Difference

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References

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