高压电缆GIS终端环氧套管典型缺陷仿真与故障分析  

Simulation of Typical Defects and Analysis of Insulation Breakdown in Epoxy Bushing of High Voltage GIS Cable Accessory

作　　者：周凤争 孟峥峥[1] 宋鹏先[1] 朱晓辉[1] 李旭[1] 朱明正[1] 于洋[1] 房晟辰 ZHOU Feng-zheng;MENG Zheng-zheng;SONG Peng-xian;ZHU Xiao-hui;LI Xu;ZHU Ming-zheng;YU Yang;FANG Sheng-chen(Electric Power Research Institute of Tianjin Electric Power Corporation,Tianjin 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6期91-92,41,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GIS终端电场分布进行仿真,研究表明:环氧套管的高压电极处的电场强度最为集中,其电场强度远大于空气的平均击穿场强30kV/cm;当高压电极周边存在典型气泡缺陷时,会引起局部放电,导致绝缘击穿故障。通过对一起220kV电缆GIS终端绝缘故障分析,提出针对性的技术措施。The electric field distribution of 220kV high voltage GIS cable terminal is simulated by finite element method.The results show that the electric field intensity is the most concentrated around the high voltage electrode of epoxy bushing,which is far greater than 30kV/cm(the air breakdown field strength).If there are typical bubble defects around the high voltage electrode,partial discharge will be caused,and finally it will lead to insulation breakdown.Based on the analysis of a 220kV GIS cable terminal insulation breakdown,the corresponding technical measures are proposed.

关 键 词：高压电缆GIS终端 环氧套管 典型缺陷 绝缘故障 仿真分析 

分 类 号：TM854[电气工程—高电压与绝缘技术] TM215.1[一般工业技术—材料科学与工程]