改进加窗插值FFT动态谐波分析算法及应用

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Abstract In order to decrease the spectral leakage and picket fence effects of the windowed interpolation FFT algorithm for harmonic analysis, the spectral characteristics of fast decay and minimize sidelobe window (FDMS window) are analyzed and the interpolation FFT algorithms for electrical harmonic analysis based on the FDMS window are proposed in this paper. The applicable formulas of the interpolation are obtained by using polynomial curve fit functions, and subsequently calculating burden is dramatically reduced. The simulation results indicate that, with non-synchronized sampling and non-integral period truncation, the proposed method gives the accurate results for weak harmonic extraction and complicate harmonic analysis. The proposed method is applied in the three phase multiply function power energy meter, which verifies the usefulness of the proposed method.

Key words： Harmonic analysis spectral leakage fast decay and minimize sidelobe window interpolation algorithm fast Fourier transform

Received: 12 April 2010 Published: 20 March 2014

PACS:	TM85
	TM933

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	Wen He
	Teng Zhaosheng
	Wang Yong
	Zeng Bo
	Zheng Dan

Cite this article:

Wen He,Teng Zhaosheng,Wang Yong等. Improved Windowed Interpolation FFT Algorithm and Application for Power Harmonic Analysis[J]. Transactions of China Electrotechnical Society, 2012, 27(12): 270-277.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I12/270

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