基于纳米SiO<sub>2</sub>复合填充的交联聚乙烯电缆水树修复新技术

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Abstract A new rejuvenation liquid toward forming nano-SiO₂ composite fillers inside water tree channels was presented, and the rejuvenation performance of the reformulation was compared with that of previous formulation. A water-needle method was employed to obtain water tree aged cables, and the cables were injected with two groups of nano rejuvenation liquids. Dielectric loss factor (tanδ) and AC breakdown tests show that the reformulation leads to a greater increase in cable insulation performance than the previous formulation. Microscope observation proved that there are fillers in the water tree channels after rejuvenation. By a scanning electron microscope (SEM) analysis, nano SiO₂particles are observed smaller than TiO₂, and the SiO₂particles are more uniformly embed in the XLPE matrix inside the breakdown channels of the rejuvenated cables. According to the results, it shows that the new rejuvenation liquid can form nano-SiO₂ composite fillers inside water tree channels, and the reformulation has better rejuvenation performance than the previous formulation. Furthermore, a coupling model was presented, based on which the experimental results were explained.

Key words： XLPE cables water tree insulation rejuvenation nano particle interface

Received: 10 September 2014 Published: 08 September 2015

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TM85

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	Yang Mingliang
	Zhou Kai
	Wu Ke
	Tao Wenbiao
	Yang Di

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Yang Mingliang,Zhou Kai,Wu Ke等. A New Rejuvenation Technology Based on Formation of Nano-SiO₂ Composite Fillers for Water Tree Aged XLPE Cables[J]. Transactions of China Electrotechnical Society, 2015, 30(14): 481-487.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I14/481

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