绝缘纸板的老化对其爬电性能的影响

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Abstract To research the aging effect of pressboard on creepage discharge characteristics various aged pressboards was made up by thermal aging method, creepage discharge process was researched by global-plate and needle-plate electrode, creepage discharge phenomenon was observed, inception voltage, extinction voltage, “white mark” development velocity, enduring time and breakdown channel length were measured, pressboard layer microstructure was analyzed. The results show that creepage discharge inception voltage of aged pressboards are immovable and extinction voltage decrease slightly compared with unaged pressboards; creepage discharge in aged pressboards have higher development velocity and longer breakdown channel; creepage discharge characteristics in pressboards layer direction have remarkable decreasement in aged pressboards caused by the decreasement of compactedness and increasement of cavity amount and volume between cellulose layer.

Key words： Power transformer aging insulation pressboard creepage discharge

Received: 08 November 2011 Published: 20 March 2014

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TM855

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	Articles by authors
	Wang Wei
	Xu Jianfeng
	Wang Xin
	Li Chengrong

Cite this article:

Wang Wei,Xu Jianfeng,Wang Xin等. Aging Effect Pressboards on Creepage Discharge Characteristics[J]. Transactions of China Electrotechnical Society, 2012, 27(10): 20-25.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I10/20

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