高压电器2025，Vol.61Issue(6)：85-91,7.DOI:10.13296/j.1001-1609.hva.2025.06.010
运行工况下特高压GIL三支柱绝缘子机械应力分布仿真研究
Simulation Study on Mechanical Stress Distribution of UHV GIL Tri-post Spacer Under Operating Conditions
摘要
Abstract
Tri-post spacer is the key insulation support component of EHV and UHV gas-insulated transmission line(GIL),and its mechanical reliability is directly related to the safe operation of the GIL.In this paper,the principal stress distribution and mechanical reliability of the tri-post spacer in 1 100 kV GIL are systematically analyzed with consideration of the thermal expansion,electromagnetic vibration and conductor deflection.The main conclusions ob-tained are as follows:The maximum tensile stress and compressive stress of the tri-post spacer at no load current are located at the lower post and the post-insert boundary,which are 2.37 MPa and 9.02 MPa respectively.It is found af-ter comprehensive considering the influence of thermal expansion and pipeline vibration that the tensile stress is are located in the abdomen of the spacer and the boundary of lower posts,and the maximum value is 16.6 MPa.In case of conductor deflection due to assembly error,the tensile stress concentration at the boundary of the post opposite to the deflection displacement increases.The results above can provide theoretical support for improving the reliability of GIL tri-post spacer.关键词
气体绝缘输电管道/三支柱绝缘子/多物理场/机械应力Key words
GIL/tri-post spacers/multi-physics/mechanical stress distribution引用本文复制引用
王亚祥,刘松涛,蔡玉龙,王雨帆,袁端鹏,王明洋,李进..运行工况下特高压GIL三支柱绝缘子机械应力分布仿真研究[J].高压电器,2025,61(6):85-91,7.基金项目
国家自然科学基金(51807136).Project Supported by National Natural Science Foundation of China(51807136). （51807136）
