环氧复合绝缘材料表面处理方法对高气压下闪络特性的影响

doi:10.19595/j.cnki.1000-6753.tces.180926

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Abstract Epoxy composite insulation samples were treated by discharge plasma, ion implantation, and surface fluorination treatments, respectively. The effects of different treatment methods on the surface condition of the insulating material and the flashover characteristics under negative DC voltage in high pressure c-C₄F₈/N₂ mixed gas were investigated. The experimental results show that discharge plasma and ion implantation methods cannot increase the surface flashover voltage of the sample in the high gas pressure c-C₄F₈/N₂ mixture gas, and the discharge directly destroys the surface structure, resulting in insulation failure; the flashover voltage of the epoxy-insulated sample after fluorination is improved. Measurements show that the surface fluorination causes the surface potential of the epoxy composite insulating material to decrease, the potential decay to increase, and the surface trap level to decrease. Furthermore, the trap density increases with the increase of the fluorination time. It is believed that discharge plasma and ion implantation methods dealing with the surface of insulating materials need to be improved. Direct surface fluorination method can improve the high-pressure flashover characteristics of the insulating material, but the reduction of the withstand discharge numbers will limit its application.

Key words： High pressure flashover c-C₄F₈ surface treatment epoxy composite

Received: 30 May 2018 Published: 30 October 2018

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	Wang Jue
	Xu Rong
	Yan Ping

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Wang Jue,Xu Rong,Yan Ping. Effect of Surface Treatment Methods of Epoxy Composite Insulation on Flashover Characteristics under High Pressure[J]. Transactions of China Electrotechnical Society, 2018, 33(20): 4704-4711.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180926 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I20/4704

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