交直流切换下环氧树脂表面电场分布特性的仿真研究  

Simulation Research on Electric Field Distribution Characteristics of Epoxy Resin Surface Under AC⁃DC Switching

作　　者：谢庆[1,2] 吕天舒 宋岩泽 段祺君 吴悦 夏国巍 XIE Qing;LYU Tianshu;SONG Yanze;DUAN Qijun;WU Yue;XIA Guowei(Department of Electrical Engineering,North China Electric Power University,Hebei Baoding 071003,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学电力工程系,河北保定071003 [2]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《高压电器》2022年第11期24-30,共7页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(52007065);北京市自然科学基金资助项目(3222057)。

摘　　要：高压气体绝缘封闭开关设备(gas insulated switchgear,GIS)用盆式绝缘子通常采用环氧树脂浇注而成,在直流电压下易积聚表面电荷,进而诱发沿面闪络。为了研究直流电压作用后切换交流电压情况下的环氧树脂界面电气性能,通过Comsol有限元软件构建了环氧树脂仿真模型,分别对直流电压、交直流电场切换瞬态下的表面电荷积聚和表面电场分布情况进行了仿真计算;通过仿真对比分析了表面电导率、交流电压初始相位对交直流电压切换时刻环氧树脂界面特性的影响。该研究成果可为GIS优化设计提供参考。The insulating spacer for high⁃voltage gas insulated switchgear(GIS)are usually made of epoxy resin by way of casting.The surface charges are likely to accumulate under DC voltage,which will cause surface flash⁃over.For studying the electrical properties of epoxy resin interface under the condition of switching AC voltage after apply⁃ing DC voltage,a simulation model of epoxy resin is constructed by using Comsol finite element software in this paper.The surface charge accumulation and surface electric field distribution under switching transients of DC voltage and AC and DC electric field are simulated and calculated respectively.The influence of surface conductivity and initial phase of AC voltage on the interface characteristics of epoxy resin during the switching of AC and DC voltage is com⁃pared and analyzed through simulation.The research results can provide reference for optimization design of GIS.

关 键 词：交直流切换 环氧树脂 表面电荷 电场分布 

分 类 号：TM216[一般工业技术—材料科学与工程] TM595[电气工程—电工理论与新技术]