绝缘子污秽放电泄漏电流的多重分形特征研究

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Abstract In order to obtain effective contamination discharge characteristics hidden in leakage current waveforms, the variation method of fractal is used to extract multi-fractal characteristics by taking a number of experiments in the laboratory. The change features of generalized fractal dimension and multi-fractal spectrum are investigated under 4 kinds of contamination degrees and different contamination discharge zones. It shows that the decreasing rate of generalized fractal dimension values, as well as the width of multi-fractal spectrum, varies with 4 different degrees of contamination. Significant difference is observed for the width and shape of multi-fractal spectrum in different contamination discharge zones. These results present that the characteristics of generalized fractal dimension values and multi-fractal spectrum can be employed to predict the development of contamination discharge. It provides a new method for the pre-warning of contamination flashover.

Key words： Insulator leakage current generalized fractal dimensions multi-fractal spectrum contamination degree contamination discharge zones

Received: 02 November 2011 Published: 27 November 2013

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TM852

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	Chen Weigen
	Wang Wanping
	Xia Qing

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Chen Weigen,Wang Wanping,Xia Qing. Research on Multi-fractal Characteristics of Leakage Current for Contamination Discharge of Insulators[J]. Transactions of China Electrotechnical Society, 2013, 28(1): 50-56.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I1/50

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