高压电器2025，Vol.61Issue(4)：120-129,138,11.DOI:10.13296/j.1001-1609.hva.2025.04.014
特高压换流站气体绝缘金属封闭输电线路(GIL)抗震性能提升方法研究
Study on Seismic Performance Improvement Methods for Gas-insulated Transmission Lines(GIL)in Ultra-high Voltage Converter Station
王电处 1余荣兴 1李浩丹 2张涵2
作者信息
- 1. 中国南方电网有限责任公司,广州 510000
- 2. 中国南方电网有限责任公司超高压输电公司大理局,云南 大理 671000
- 折叠
摘要
Abstract
With the widespread application of gas-insulated transmission lines(GIL)in ultra-high voltage converter substation,the impact of seismic on its structural safety has been concerned.In this paper,the response characteris-tics of GIL under seismic action is analyzed on the basis of a refined finite element model,and specific performance enhancement methods for the seismic weak points are proposed.The study shows that the primary weak points of GIL are located at vertical bends,with such two failure modes as damage of enclosure strength and of internal pull-out of internal conductor joint.Additionally,the dynamic amplification effect of the supports is significant,the acceleration amplification factors generally exceed 2.0,however,the dynamic amplification effect of the supports is not the sole factor determining the seismic performance of the GIL.By increasing the fundamental frequency of the supports and fixing the connections between the supports and the enclosure,the peak of the relative displacement of the internal conductor and the peak stress of the enclosure can be reduced effectively,thereby significantly improving the overall seismic performance.The reinforcement measures can reduce the seismic vulnerability of the GIL by more than 50%when the peak ground acceleration(PGA)exceeds 0.4g.This study in this paper provides theoretical support and practical guidance for improving the seismic performance of GIL.关键词
气体绝缘金属封闭输电线路(GIL)/抗震性能/有限元分析/支架加固/地震易损性Key words
gas-insulated transmission lines(GIL)/seismic performance/finite element analysis/support rein-forcement/seismic vulnerability引用本文复制引用
王电处,余荣兴,李浩丹,张涵..特高压换流站气体绝缘金属封闭输电线路(GIL)抗震性能提升方法研究[J].高压电器,2025,61(4):120-129,138,11.
