基于概率地震需求分析的750 kV-SF_(6)罐式断路器耦联体系地震易损性模型  

Seismic vulnerability model of 750 kV-SF_(6)tank circuit breaker coupling system based on probabilistic seismic demand analysis

作　　者：武鹏 崔佳伟 车爱兰[1] WU Peng;CUI Jiawei;CHE Ailan(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,200040 Shanghai,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200040

出　　处：《应用力学学报》2023年第4期832-839,共8页Chinese Journal of Applied Mechanics

基　　金：国家重点研发计划资助项目(No.2018YFC0809400)。

摘　　要：变电站作为电力系统的枢纽,其抗震性能评估尤为重要,其中罐式断路器耦联体系是变电站中的重要设备之一。为研究750 kV-SF_(6)罐式断路器耦联体系的抗震性能,采用增量动力分析(IDA)以及概率地震需求分析(PSDM)相结合的方法评估了其地震易损性。首先分析了750 kV-SF_(6)罐式断路器耦联体系的结构特性和震损特征,构建了有限元模型。通过增量动力分析(IDA),以地面峰值加速度(PGA)为地震动输入参数,得到关键易损部位的地震响应。在此基础上,通过概率地震需求模型(PSDM)生成了每个易损部位在不同震损状态下的地震易损性曲线。最后,基于可靠度理论计算得到了750 kV-SF_(6)罐式断路器耦联体系的地震易损性模型。结果表明,可以确定该结构在不同PGA下发生完全、严重、中度和轻微损坏的概率,反映了结构的抗震性能水平,例如当PGA达到0.6 g时,750 kV-SF_(6)罐式断路器耦联体系4种破坏状态的概率分别分0%,1%~5%,88%~93%和100%。As the hub of power system,the seismic performance evaluation of substation is particularly important,and the tank circuit breaker coupling system is one of the important equipment in substation.In order to study the seismic performance of 750 kV-SF_(6)tank circuit breaker coupling system,incremental dynamic analysis(IDA)and probabilistic seismic demand model(PSDM)were used to evaluate its seismic vulnerability.Firstly,the structural characteristics and seismic loss characteristics of 750 kV-SF_(6)tank circuit breaker coupling system are analyzed,and the finite element model is constructed.Based on the incremental dynamic analysis(IDA),the peak ground acceleration(PGA)is used as the input parameter to obtain the seismic response of the key vulnerable parts.On this basis,the seismic vulnerability curves of each vulnerable part under different seismic damage states are generated by probabilistic seismic demand model(PSDM).Finally,based on the reliability theory,the seismic vulnerability model of 750 kV-SF_(6)can circuit breaker coupling system is obtained.The results show that when PGA reaches 0.6 g,the failure probability of 750 kV-SF_(6)tank circuit breaker coupling system is 0%,1%~5%,88%~93%and 100%,respectively.

关 键 词：SF_(6)罐式断路器 增量动力分析 概率地震需求模型 可靠度理论 易损性 

分 类 号：TM561.1[电气工程—电器]