高电压技术2019，Vol.45Issue(4)：1056-1063,8.DOI:10.13336/j.1003-6520.hve.20190329006
直流GIL用非线性电导环氧绝缘子电场仿真
Electrical Field Simulation of Epoxy Spacer with Nonlinear Conductivity for DC GIL
摘要
Abstract
The electrical field distortion at the gas-solid interface is a primary factor to induce flashover and decrease the withstand voltage of the HVDC gas insulated transmission line (GIL). Traditional electrical field homogenization methods, such as structure optimization and material modification, have some limitations, thus urgently required to be effectivelyregulated. We proposed to use nonlinear conductivity composite to suppress field distortion. Electrical field along the traditional and novel spacers under different conditions were calculated based on the measured nonlinear conductivities of epoxy composites at different temperatures. Results show that, in full load conditions, the conductor temperature rise can uniform the electrical field in a certain range, but it will cause field distortion near the ground electrode while overloading.The application of nonlinear conductive epoxy composites can decrease the maximum field by 40％ and uniform the electrical field distribution under high temperature gradients. The power loss generated by the leakage current in the spacer increases with temperature, but it can be ignored compared with the conductor current heating. Epoxy composites with nonlinear conductivity can improve the electric field distribution at the gas-solid interface effectively, and are expected to be widely used in DC GIL.关键词
高压直流/气体绝缘输电管道/环氧绝缘子/电场畸变/非线性电导/功率损耗Key words
HVDC/gas insulated transmission line/epoxy spacer/electrical field distortion/nonlinear conductivity/power loss引用本文复制引用
李进,张程,杜伯学,梁虎成,傅明利,侯帅..直流GIL用非线性电导环氧绝缘子电场仿真[J].高电压技术,2019,45(4):1056-1063,8.基金项目
国家自然科学基金 (51807136) （51807136）
天津市自然科学基金 (18JCQNJC07300) （18JCQNJC07300）
博士后基金面上项目 (2017M621070) （2017M621070）
博士后创新人才支持计划 (BX201700168) （BX201700168）
中国南方电网有限责任公司科技项目 (WYKJQQ20143013) （WYKJQQ20143013）
广东省领军人才专项基金 (SEPRI-K151001) （SEPRI-K151001）
