高电压技术2024，Vol.50Issue(11)：5005-5013,9.DOI:10.13336/j.1003-6520.hve.20240636
甘肃积石山6.2级地震750kV避雷器震害统计及损伤机理分析
Disaster Investigation and Seismic Damage Mechanism Analysis of 750 kV Arresters in the Jishishan 6.2-Magnitude Earthquake in Gansu Province
摘要
Abstract
Substation arrester has a high vulnerability to earthquakes.An MS(surface wave magnitude)6.2 earthquake occurred in the Jishishan region(in Gansu Province of China)on December 18th,2023.The massive arresters in a 750 kV substation lost electrical function by the earthquake.In order to study the seismic damage mechanism of the 750 kV ar-rester,this paper conducts a field investigation on the seismic damage of the substation and gives different damage modes and seismic vulnerability of the arrester.The finite element analysis is used to simulate the seismic response of the arrester under the action of earthquake,and the mechanism of seismic damage is analyzed.The results show that the failure modes of the arrester include the fracture of porcelain sleeve at the bottom of bush,the traction deformation of the conducting wire,and the short-circuit fault caused by the collision of adjacent equipment.With the increase in the stiffness of the steel support,the stress response at bottom of porcelain sleeve shows a trend of decreasing first and then maintaining the level.The relative displacement at the top of coupling structure with different fundamental frequencies(current trans-former and arrester connected by conduct wire)reaches its maximum allowable displacement value,which leads to traction damage.The use of lattice steel support and seismic isolation devices can increase the seismic safety margin of arresters and improve the seismic performance of electrical equipment.关键词
积石山地震/避雷器/震害调研/损伤机理/减隔震措施Key words
Jishishan Earthquake/arresters/seismic disaster investigation/damage mechanism/seismic isolation measures引用本文复制引用
石高扬,薛志航,谢强,刘凡..甘肃积石山6.2级地震750kV避雷器震害统计及损伤机理分析[J].高电压技术,2024,50(11):5005-5013,9.基金项目
四川省科技计划项目(2023YFG0089).Project supported by Science and Technology Program of Sichuan Province(2023YFG0089). （2023YFG0089）
