空气中微秒脉冲沿面放电对环氧树脂表面特性影响研究  

Effect of Atmospheric-pressure Microsecond Pulsed Discharges on Epoxy Resin Surface

作　　者：刘熊[1,2] 林海丹[3] 梁义明[3] 章程[2] 谢庆[1] 邵涛[2] 

机构地区：[1]华北电力大学,保定071003 [2]中国科学院电工研究所,北京100190 [3]国网吉林省电力有限公司电力科学研究院,长春130021

出　　处：《电工技术学报》2015年第13期158-165,共8页Transactions of China Electrotechnical Society

基　　金：河北省自然科学基金(E2015502081);国网吉林省电力有限公司科技项目(2014-30)资助

摘　　要：为了获得常压条件下绝缘支撑材料环氧树脂的沿面闪络特性,通过微秒脉冲下连续沿面放电对环氧树脂表面造成老化损伤,获得老化前后的环氧树脂沿面闪络特性数据。在脉冲电压幅值为18 k V、频率为100 Hz、电极间距为10 mm的情况下,对环氧树脂表面进行沿面放电老化处理,对不同放电老化时间下的表面形貌、粗糙度及水接触角进行测量,分析放电对材料表面的老化影响。结果发现,放电老化后环氧树脂表面疏松,且有大量突起颗粒形成,表面极易吸水。此外对老化前后的环氧树脂表面进行闪络实验,结果发现,表面闪络电压随老化时间出现先降低后升高的现象。相关实验结果及分析为研究环氧树脂的沿面耐压性能提供了一定的参数数据。In order to study the surface flashover on epoxy resin （EP） under atmospheric pressure, the surface flashover characteristics are experimented before and after discharges, which was driven by repeated microsecond pulses to cause discharge aging. All EP surface discharge aging experiments are done by an 18 kV pulsed voltage with 100 Hz frequency and 10 mm gap distance. All the surface roughness, water contact angle, morphology of EP surface characteristics are measured after different aging times. It shows that a large number of protruding particles can be found on the PE surface after discharge, which indicates that the surface discharges make the PE surface become porous and hydrophilic. Through the fiashover experiments on the aged EP, it is found that the flashover voltage decreased and then increased with time. These experimental results can provide some reference to study the EP surface flashover.

关 键 词：沿面闪络 放电老化 环氧树脂 微秒脉冲 表面特性 

分 类 号：TM89[电气工程—高电压与绝缘技术] TM315