高压电器2024，Vol.60Issue(4)：199-206,8.DOI:10.13296/j.1001-1609.hva.2024.04.024
温度对环氧树脂沿面闪络特性的影响研究
Research on Influence of Temperature on Surface Flashover Characteristics of Epoxy Resin
摘要
Abstract
The insulation problem of Ultra High Voltage Direct Current(UHVDC)wall bushing is the research fo-cus of UHVDC transmission technology.In actual working conditions,the wall bushing is often at ambient tempera-tures above room temperature due to the influence of internal and external environment,which causes the insulation performance to be affected to a certain extent.For studying the variation of flashover voltage of epoxy resin under AC and DC voltage and the mechanism of temperature influence,an epoxy resin flashover test platform is set up to measure flashover voltage of the epoxy resin under different temperature within the constant SF6 gas pressure,and the reason of flashover voltage variation is analyzed by simulation.The results show that the flashover voltage of ep-oxy resin first decreases slightly and then increases with the increase of temperature in the range of 25℃to 70℃.It shows that there is a minimum flashover voltage in this temperature range.This phenomenon is caused by the joint action of the electric field distribution at the gas-solid interface,the critical electric field strength of SF6 gas and the energy level of surface-trap of epoxy resin.The study results can provide experimental basis for optimizing the insulation configuration of UHVDC wall bushing.关键词
穿墙套管/环氧树脂/沿面闪络/温度Key words
wall bushing/epoxy resin/surface flashover/temperature引用本文复制引用
吴延宇,张蕾,黄猛,周秀,汤浩,覃林生,李秀芬..温度对环氧树脂沿面闪络特性的影响研究[J].高压电器,2024,60(4):199-206,8.基金项目
国家电网科学技术项目(GY71-18-022) （GY71-18-022）
国家自然科学基金(51807062). Project Supported by Science&Technology Project of State Grid Corporation of China(GY71-18-022),National Natural Science Foundation of China(51807062). （51807062）
