直流GIL表层功能梯度绝缘子参数设计与电场优化  

Parameter Design and Electric Field Optimization of Surface Functionally Graded Spacer for HVDC GIL

作　　者：姚航 杜伯学 梁虎成 董佳楠 YAO Hang;DU Boxue;LIANG Hucheng;DONG Jianan(Key Laboratory of Smart Grid of Education Ministry,School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学电气自动化与信息工程学院智能电网教育部重点实验室,天津300072

出　　处：《高压电器》2023年第9期106-112,共7页High Voltage Apparatus

基　　金：国家自然科学基金项目(52220105002);博士后创新人才支持计划资助项目(BX2021210)。

摘　　要：为调控直流稳态与极性反转工况下直流气体绝缘输电线路(HVDC GIL)绝缘子的沿面电场分布,分别设计了稳态梯度(ST-SFGM)绝缘子与极反梯度(PR-SFGM)绝缘子。迭代优化后的SFGM绝缘子涂层电导率恒定,厚度沿r坐标方向减小。电场仿真结果表明,直流稳态工况下均匀绝缘子的最大电场出现在高压三结合点附近,强度为4.25 kV/mm。ST-SFGM绝缘子与PR-SFGM绝缘子的直流电场分布较为均匀,最大电场强度分别下降54.6%与62.1%。极性反转工况下,均匀绝缘子与ST-SFGM绝缘子的电场畸变加剧,最大电场强度分别提升1.09和3.44倍,而PR-SFGM绝缘子的最大电场强度则基本保持不变。In order to regulate the surface electric field distribution of spacer for high voltage direct current gas insulated transmission line(HVDC GIL)under DC steady-state and polarity reversal conditions,the steady-state surface functionally graded materials(ST-SFGM)spacer and the polarity reversal surface functionally graded materials(PR-SFGM)spacer are designed respectively.The conductivity of the SFGM coating iterative optimization keeps constant,and the thickness decreases along the coordinate.The electric field simulation results show that the maximum electric field of the uniform spacer under DC steady-state condition appears near the high voltage triple junction,with the strength of 4.25 kV/mm.The DC electric field distributions of the ST-SFGM and the PR-SFGM spacers are relatively uniform,and the maximum electric field strength decreases by 54.6%and 62.1%respectively.In case of the polarity reversal condition,the electric field distortion of the uniform and the ST-SFGM spacers are intensified,and the maximum electric field strength is increased by 1.09 and 3.44 times respectively,while the maximum electric field strength of the PR-SFGM spacer remains basically unchanged.

关 键 词：直流 极性反转 功能梯度绝缘子 参数设计 电场调控 

分 类 号：TM216[一般工业技术—材料科学与工程]