电瓷避雷器Issue(6)：130-137,8.DOI:10.16188/j.isa.1003-8337.2024.06.015
复合绝缘子芯棒用高导热环氧树脂氮化硼复合材料表面耐电痕特性研究
Surface Insulation Failure Characteristics of High Conductivity Epoxy Resin/BN Composite for Composite Insulator Core
摘要
Abstract
The composite insulators of extra-high/ultra-high voltage transmission lines operate in a harsh environment,and they are subjected to multi-field coupling of electricity,heat and force during operation.In addition,the thermal conductivity of the epoxy resin material of the composite insulator core is low,which makes it difficult for the local accumulated heat to dissipate quickly,and it is easy to cause abnormal heat of the composite insulator,resulting in premature insulation failure.Therefore,the prepa-ration of epoxy resin with high thermal conductivity is of great significance to improve the reliability of composite insulators and prolong their service life.In this paper,micro and nano BN particles were se-lected as thermal conductive fillers to prepare epoxy resin composites with different micro and nano doping ratios.The electrical and thermal properties of epoxy resin composites with different micro and nano do-ping ratios were tested,and the surface discharge and electrical trace failure characteristics of the com-posites were obtained.The mechanism of micro and nano boron nitride particle doping on the improve-ment of electrical and thermal properties of epoxy resin was analyzed.The results show that the doping of micro-nano boron nitride particles can effectively improve the thermal conductivity of epoxy resin com-posites,improve the discharge initiation and flashover voltage along the surface,and enhance the surface tracking resistance of epoxy resin composites.关键词
环氧树脂/复合材料/沿面放电/陷阱分布/电痕破坏Key words
epoxy resin/micro-nano filling/flashover along surface/trap distribution/tracking damage引用本文复制引用
刘会斌,郑靖泉,王智文,邢云琪,张大沛,杨雪城,张欣伟,冯振华,王湃,姚明禹,尚鑫,李博..复合绝缘子芯棒用高导热环氧树脂氮化硼复合材料表面耐电痕特性研究[J].电瓷避雷器,2024,(6):130-137,8.基金项目
国网内蒙古东部电力有限公司科技项目(编号SGMDDK00GGJS2100128).Project supported by Science and Technology Program of State Grid Inner Mongolia Eastern Electric Power Co.,Ltd.(No.SGMDDK00GGJS2100128). （编号SGMDDK00GGJS2100128）
