基于DRSC窗递推DFT算法的电力谐波检测

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Abstract A recursive discrete Fourier transform(DFT) algorithm with discrete rectangular self-convolution(DRSC) window is proposed in this paper, and used for high-precision real-time power harmonic parameter estimation. By converting the recursive DFT from finite impulsse response(FIR) filter to infinite impulse responsec(IIR) filter form, the recursive DFT formula with DRSC window is deducted. Furthermore, the real-time estimation of electrical harmonic parameters is implemented by use of the phase difference DFT correction algorithm. The harmonic estimating algorithm uses the spectral characteristics of the DRSC window, which can not only minimize inter spectrum leaks effect on fundamental and harmonic components to improve the accuracy of spectral analysis, but also significantly reduce the computation burden of harmonic real-time analysis by recursive algorithm. Simulation results have showed the feasibility and effectiveness of the proposed algorithm.

Key words： Harmonic analysis discrete Fourier transform (DFT) window function window and interpolation algorithm recursive algorithm

Received: 20 September 2012 Published: 25 March 2014

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TM930

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	Luo Jiao
	Jiang Yaqun
	Huang Chun
	Cao Yijia
	Sun Yanguang

Cite this article:

Luo Jiao,Jiang Yaqun,Huang Chun等. Power System Harmonic Parameters Estimation Based on Recursive DFT Algorithm with DRSC Window[J]. Transactions of China Electrotechnical Society, 2013, 28(9): 47-53.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I9/47

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