在线注入有机硅修复液对交联聚乙烯电缆中水树生长的影响

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Abstract A novel method of on-line rejuvenation for water trees in service cross-linked polyethylene (XLPE) cables is presented,the inhibition effect and the rejuvenation mechanism are also discussed.A 30-day accelerated water tree aging experiment was done on the new samples,the prior rejuvenation samples and the on-line rejuvenation samples.After that,a microscope was used to observe the morphology of water trees and measure the length of the water trees.By differentially scanning calorimetry (DSC),the insulation degradation degree of the three group samples was analyzed.Meanwhile,the changes of micromorphology and chemical structure in water-tree areas were observed by scanning electron microscope (SEM) and energy disperse spectroscopy (EDS).The results show that the on-line rejuvenation method can effectively inhibit the propagation of water trees.Under the effect of electric field,the siloxane and water molecules are driven to the high electric field areas (such as void,water tree area,etc.) for reaction,which eliminates the deterioration in the insulation and generates gel particles to fill the areas,relieving the insulation degradation to some degree.

Key words： XLPE cable water tree siloxane electric field chain orientation dielectrophoretic force

Received: 17 June 2015 Published: 21 November 2016

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TM854

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	Huang Ming
	Zhou Kai
	Yang Di
	Yang Mingliang

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Huang Ming,Zhou Kai,Yang Di等. Effect of On-Line Rejuvenation on Water Tree Propagation in XLPE Cables[J]. Transactions of China Electrotechnical Society, 2016, 31(21): 176-182.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I21/176

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