基于最优窗Burg算法的电力系统间谐波谱估计

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Abstract The Burg algorithm is suitable for spectral estimation of inter-harmonic in power system, but its effect of spectral estimation is affected by peak bias and spectral line splitting. By analyzing the error, a new method of inter-harmonic spectral estimation based on the optimal window Burg algorithm is presented in this paper. The optimal window can be obtained by minimizing the variance of average frequency error. Then reflection coefficient is obtained by minimizing the average power of windowed prediction error. Finally, the power spectrum is obtained. Experimental results show this method has high frequency resolution compared with Burg algorithm and hamming window Burg algorithm. And by Levinson iteration, this method has lower computational complexity than eigenvalue method. This method can be used in the inter-harmonic spectral estimation in power system.

Key words： Power quality the optimal window Burg algorithm inter-harmonics power system

Received: 20 July 2009 Published: 07 March 2014

PACS:

TM711

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	Li Ming
	Wang Xiaoru

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Li Ming,Wang Xiaoru. Inter-Harmonic Spectral Estimation in Power System Based on the Optimal Window Burg Algorithm[J]. Transactions of China Electrotechnical Society, 2011, 26(1): 177-182.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2011/V26/I1/177

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