高电压技术2024，Vol.50Issue(3)：1014-1024,11.DOI:10.13336/j.1003-6520.hve.20230400
考虑温度梯度的高压直流GIL盆式绝缘子空间电荷仿真
Space Charge Simulation for Basin Insulator of High Voltage DC GIL Considering Temperature Gradient
摘要
Abstract
Under DC voltage and temperature gradient,space charge is easy to accumulate inside the basin-type insulator of DC gas-insulated transmission line(GIL),leading to local electric field distortion.Therefore,it is of great significance to study the space charge accumulation characteristics of basin-type insulators under DC voltage to improve the insulation performance of DC GIL.DC GIL basin insulator is taken as the research object,and a multi-physical field coupling model of electric-heat-fluid-charge based on two-dimensional bipolar carrier model is established to study the space charge characteristics and electric field distribution of basin insulators under different temperatures,voltage levels and voltage polarities.The results show that the model can effectively simulate the distribution of space charge and electric field in basin insulator.Under the working condition of the basin insulator,the space charge mainly accumulates at the interface between the metal and the insulating material,and the maximum space charge density is 156.59 mC/m3,which causes the internal electric field distortion to a certain extent.The space charge simulation of insulators under complex working con-dition can solve the current situation that it is difficult to measure space charge directly in power equipment.Besides,the simulation method and results can provide theoretical support for insulation optimization design of DC GIL.关键词
空间电荷/盆式绝缘子/直流GIL/电场分布/环氧复合材料Key words
space charge/basin insulator/DC GIL/electric field distribution/epoxy composites引用本文复制引用
庞曦,许天蕾,刘鹏,魏鼎欣,谢宗良,彭宗仁..考虑温度梯度的高压直流GIL盆式绝缘子空间电荷仿真[J].高电压技术,2024,50(3):1014-1024,11.基金项目
国家电网公司科技项目(SGSNKY00KJJS2100285). Project supported by Science and Technology Project of SGCC(SGSNKY00KJJS2100285). （SGSNKY00KJJS2100285）
