杂质引发高压电缆户外终端硅橡胶电树枝绝缘击穿分析  

Simulation and Analysis of Silicone Rubber Electrical Tree Insulation Breakdown in High Voltage Outdoor Cable Terminals Caused by Impurity Defects

作　　者：周凤争 宋鹏先[1] 朱晓辉[1] 孟峥峥[1] 李旭[1] 朱明正[1] 于洋[1] 房晟辰 ZHOU Feng-zheng;SONG Peng-xian;ZHU Xiao-hui;MENG Zheng-zheng;LI Xu;ZHU Ming-zheng;YU Yang;FANG Sheng-chen(Electric Power Research Institute of Tianjin Electric Power Corporation,Tianj in 300384,China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300384

出　　处：《合成材料老化与应用》2020年第5期57-58,18,共3页Synthetic Materials Aging and Application

基　　金：国家电网公司科技项目“电力电缆潜伏性隐患检测防护与产品施工质量评价技术研究”(合同号:SGTJDK00PJJS1800007)

摘　　要：采用有限元方法对220kV高压电缆户外终端电场分布进行计算,研究表明:应力锥上表面的电场强度过高,户外终端安装过程中的杂质附着在应力锥表面会引起电场畸变,引起电树枝放电,随着电树枝发展到应力锥喇叭口的接地位置,引发绝缘击穿故障。结合一起220kV高压电缆户外充油终端的故障分析,并提出了相应的预防性技术措施。The electric field distribution of 220kV high voltage outdoor cable terminals is simulated by finite element method.The results show that the electric field intensity is concentrated above the stress cone.If impurity defects are introduced during installation of outdoor cable terminals,partial discharge will be caused.Finally it will lead to insulation breakdown.Based on the analysis of220kV high voltage outdoor cable terminal insulation breakdown,the corresponding technical measures are proposed.

关 键 词：高压电缆户外充油终端 杂质缺陷 电树枝放电 绝缘故障 仿真分析 

分 类 号：TM854[电气工程—高电压与绝缘技术] TM215.2[一般工业技术—材料科学与工程]