复合绝缘子芯棒EP/AlN复合材料沿面闪络及破坏机理研究  

Study on surface flashover and failure mechanism of EP/AlN composite insulator rod

作　　者：张欣伟 周丽英 王博 戴雨薇 端木天翔 王彬[2] 邢云琪 ZHANG Xinwei;ZHOU Liying;WANG Bo;DAI Yuwei;DUANMU Tianxiang;WANG Bin;XING Yunqi(Electric Power Research Institute of State Grid Inner Mongolia East Electric Power Co.,Ltd.,Hohhot 010000,China;State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]国网内蒙古东部电力有限公司电力科学研究院,呼和浩特010000 [2]河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300401

出　　处：《复合材料科学与工程》2024年第5期36-42,共7页Composites Science and Engineering

基　　金：国网内蒙古东部电力有限公司科技项目(SGMDDKOOGGJS2100128)。

摘　　要：复合绝缘子芯棒用环氧树脂具有机械强度高、绝缘性能好的优点,但在发热温升情况下极易产生电痕破坏,导致电网长期运行稳定性和安全性降低。因此,本文制备了不同微纳比环氧树脂/氮化铝(EP/AlN)复合材料,测试了沿面闪络及表面耐电痕特性,并结合陷阱分布特性及表面破坏参数进行分析。结果表明:随纳米颗粒掺杂比例提高,表面陷阱对电荷捕获能力下降,表面电导率有所提升,加快了表面放电进程,使闪络电压降低,单次释放能量减小;结合热导率上升共同作用,有效抑制了环氧树脂表面温升,提高了环氧树脂耐电痕性能。Epoxy resin for composite insulator rod has the advantages of high mechanical strength and good insulation performance,but it is easy to produce electric tracking damage under the condition of heating and temperature rise,which leads to the decrease of long-term operation stability and safety of power grid.Therefore,in this paper,epoxy resin/aluminum nitride(EP/AlN) composites with different micro-nano ratios are prepared.The surface flashover and surface tracking resistance characteristics are tested,and the trap distribution characteristics and surface damage parameters are analyzed.The results show that with the increase of the doping ratio of nanoparticles,the charge trapping ability of surface traps decreases,the surface conductivity increases,the surface discharge process is accelerated,the flashover voltage decreases,and the single release energy decreases.Combined with the increase of thermal conductivity,the surface temperature rise of epoxy resin is effectively inhibited,and the tracking resistance of epoxy resin is improved.

关 键 词：复合绝缘子 填充改性 闪络 电痕 陷阱分布 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]