变压器油纸绝缘热老化特性及特征量研究

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Abstract In this paper, accelerated thermal aging test for four types of oil-paper samples are performed at three temperatures of 90℃, 110℃and 130℃. The samples are composed of conventional 25^# mineral oil, BIOTEMP oil (which represents a kind of vegetable oil), ordinary Kraft paper and thermally-upgraded paper. The research on changing laws of degree polymerization (DP) of paper and aging properties of oil-paper are performed, and two characteristic parameters, furfural concentration and water content in oil, and also their relationships with DP are analyzed in this paper. The main purpose of this research is to investigate the aging properties of new material insulations and supply references for applying the current aging characteristics and diagnostic techniques to the new composite insulation and lay the basis for developing the lifetime prediction theory of power transformers.

Key words： Oil-paper insulation thermal aging properties degree polymerization (DP) aging characteristics parameters insulation diagnosis

Received: 17 September 2007 Published: 17 February 2014

PACS:	TM835
	TM210.142

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	Articles by authors
	Yang Lijun
	Liao Ruijin
	Sun Huigang
	Sun Caixin
	Xiang Bin

Cite this article:

Yang Lijun,Liao Ruijin,Sun Huigang等. Investigation on Properties and Characteristics of Oil-Paper Insulation in Transformer During Thermal Degradation Process[J]. Transactions of China Electrotechnical Society, 2009, 24(8): 27-33.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2009/V24/I8/27

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