“点”“域”结合法在低频振荡分析中的应用

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Abstract With the rapid development of inter-connected power system, the low frequency Oscillation has become one of serious factors threatening the power system stability. Based on the traditional Hilbert-Huang Transform(HHT) and complex singular value decomposition(C-SVD), a novel method which combines “single measured signal” and “ensemble measurement matrix” is proposed to analyze low frequency oscillation problems in this paper. As for the individual measured signal, the energy relationships among intrinsic mode function(IMF) are explored by setting virtual ensemble matrix based on the decomposition results of empirical mode decomposition(EMD). And then the instantaneous parameters of dominant IMF are calculated by Hilbert Transform. As for the ensemble measurement matrix, C-SVD is utilized to extract the dominant proper orthogonal mode(POM). Next, the temporal characteristics and spatial distribution of dominant POM are analyzed. The oscillatory parameters and mode shape of dominant oscillation mode are determined by comparing the calculated results based on two mentioned different methods. The effectiveness of the proposed method is demonstrated by the simulation data and actual data in Europe transmission system.

Key words： Empirical mode decomposition intrinsic mode function virtual ensemble matrix complex SVD energy ratio oscillation mode shape

Received: 07 September 2011 Published: 20 March 2014

PACS:

TM712

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	Articles by authors
	Yang Dechang
	Christian.Rehtanz
	Li Yong
	Kay Gö
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	Liu Qianjin

Cite this article:

Yang Dechang,Christian.Rehtanz,Li Yong等. Application of “Individual” and “Ensemble” Integration Method inLow Frequency Oscillation Analysis[J]. Transactions of China Electrotechnical Society, 2012, 27(9): 134-139.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I9/134

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