一种用于谐波分析的高精度多谱线插值算法

doi:10.19595/j.cnki.1000-6753.tces.161693

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Abstract In order to reduce the influence of the fast Fourier transform on spectrum leakage, caused by non-synchronous sampling, and to improve the accuracy of harmonic analysis, a multi-spectrum-line interpolation algorithm with high precision was proposed. By analyzing the possibility of spectral distribution near the discrete frequency point of the windowed signal, paper used six spectral lines near the peak spectral line to calculate the harmonic information, fully considered the harmonic information of these lines. And different correction formula was given, based on different leakage conditions respectively. The multi-spectrum-line interpolation algorithm and the fitting process of correction formula was deduced in detail. Then the numerical simulation and experimental platform were set up, and studied the influences of fundamental frequency fluctuation and the non-integer harmonics on the accuracy of algorithm. Simulation and experimental results demonstrate that the proposed multi-spectrum-line interpolation algorithm is effective and has excellent accuracy.

Key words： Fast Fourier transform spectrum leakage harmonic analysis high accuracy multi-spectrum-line interpolation

Received: 28 October 2016 Published: 26 February 2018

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TM935

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	Wang Baoshuai
	Xiao Xia

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Wang Baoshuai,Xiao Xia. A High Accuracy Multi-Spectrum-Line Interpolation Algorithm for Harmonic Analysis[J]. Transactions of China Electrotechnical Society, 2018, 33(3): 553-562.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161693 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I3/553

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