软母线连接的变电站开关设备地震破坏原因分析  

Cause Analysis of Damage of Flexible-Busbar-Connected Switchgears under Earthquake

作　　者：谢强[1,2] 王亚非[1] 魏思航[1] 

机构地区：[1]同济大学建筑工程系,上海市200092 [2]同济大学土木工程防灾国家重点实验室,上海市200092

出　　处：《电力建设》2009年第4期10-14,共5页Electric Power Construction

基　　金：霍英东教育基金会青年教师基金优选资助课题(114021)

摘　　要：在地震作用下,变电站内大量使用由软母线连接的瓷质绝缘开关类设备容易受到破坏。根据5.12汶川大地震变电站典型开关类设备的地震破坏情况,首先建立了通过软母线连接的隔离开关-电流互感器-断路器耦联系统有限元模型,在输入不同峰值加速度地震波的情况下,对设备-母线耦联系统分析了结构的地震响应,然后与单体设备的地震响应分析结果进行了对比。结果表明:单体设备以及设备-母线耦联系统的地震响应不同。通过母线连接的耦联系统中,母线会对连接的设备产生牵引作用,这是许多开关类设备地震作用下破坏的一个主要原因。软母线连接的开关类设备应综合考虑设备与母线的耦联作用来进行抗震性能分析。The ceramic insulated switchgear equipment, which are very common in substations and are connected by flexible busbars, are prone to be damaged in earthquakes. According to the damages in 5.12 Wenehuan Earthquake, firstly, finite element model of coupled isolating switch-current transformer-circuit breaker system, which is connected by flexible busbars, is established to calculate structural responses of coupled equipment- husbar system under various earthquake accelerations. Then, results are compared with earthquake responses of individual equipment. Results show that the responses of individual equipment are different from that of coupled system. In flexible busbar-eonneeted coupled system, busbar produces traction to equipment it connects, which is the major cause of many switchgear equipment damages under earthquake. To switehgear equipment connected by flexible busbars, the coupling effects between equipment and busbars should be taken into consideration in earthquake resistant analysis.

关 键 词：开关设备 地震响应 软母线 有限元分析 

分 类 号：TM643[电气工程—电力系统及自动化]