等离子体氟化纳米SiC/环氧复合涂层对环氧树脂闪络特性的影响  

Effect of Plasma Fluorinated Nano-SiC/Epoxy Composite Coating on the Flashover Characteristics of Epoxy Resin

作　　者：律方成[1,2] 刘春博 詹振宇 郝留成 阮浩鸥 朱全胜 Lü Fangcheng;LIU Chunbo;ZHAN Zhenyu;HAO Liucheng;RUAN Haoou;ZHU Quansheng(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Bejing 102206,China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,China;Pinggao Group Co.,Ltd.,Pingdingshan 467001,China;Electric Power Research Institute of State Grid Henan Electric Power Company,Zhengzhou 450052,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]华北电力大学河北省输变电设备安全防御重点实验室,保定071003 [3]平高集团有限公司,平顶山467001 [4]国家电网河南省电力公司电力科学研究院,郑州450052

出　　处：《高电压技术》2020年第7期2444-2452,共9页High Voltage Engineering

基　　金：国家电网有限公司总部科技项目(SGHA0000KXJS1800891);中央高校基本科研业务费专项资金(2018QN002)。

摘　　要：环氧树脂绝缘子在电场的作用下会发生表面电荷积聚,严重时会发生沿面闪络现象,威胁电力系统和电气设备的安全运行。为此利用CF4/Ar等离子体对纳米SiC进行氟化处理,以改变其在环氧树脂中的界面特性,将含有不同质量分数氟化纳米SiC的环氧复合涂层材料以3种不同厚度涂覆在环氧树脂基体上,对其进行表面电位测试和直流闪络测试。实验结果表明:随着填料在环氧涂层中含量的增加,试样的闪络电压增高,电荷消散速度加快,陷阱能级和密度降低。增加涂层厚度同样可以提高试样的闪络电压,等离子体氟化纳米SiC质量分数为5%的涂层厚度为600μm时,闪络电压较无涂层试样提高了18.7%。涂覆等离子氟化纳米SiC/环氧复合涂层作为便捷有效的方法,在减少电气设备运行故障方面具有广阔的应用前景。Surface charges will accumulate on the surface of epoxy resin insulators under electric field effect,which cause the surface flashover in serious cases and threaten the safe operation of power system and electrical equipment.Therefore,in this paper,the nano-SiC was fluorinated by CF4/Ar plasma in order to change the interfacial characteristics of nanocomposites.The epoxy composite coating materials doped with different mass fractions fluorinated nano-SiC were coated on epoxy substrates with three different thicknesses,and the surface potential and DC flashover were tested.The experimental results show that,with the increase of the content of filler in the epoxy coating,the flashover voltage and the surface charge dissipation rate increases,and the trap energy level and density decrease.Increasing the coating thickness can also increase the flashover voltage of samples.The flashover voltage of sample coated by 600μm composite coating doped with 5%fluorinated nano-SiC is 18.7%higher than that of uncoated sample.As a convenient and effective method,plasma fluorinated nano-SiC/epoxy composite coating has bright application prospects in reducing the operational faults of electrical equipment.

关 键 词：等离子体氟化 环氧复合涂层 纳米SIC 表面电荷 直流闪络电压 

分 类 号：TM216[一般工业技术—材料科学与工程]