800 kV直流场极母线回路的地震易损性分析  

Seismic Vulnerability Analysis of 800 kV DC Field Pole Bus Circuit

作　　者：田松丰 李强 张世洪 续兴 TIAN Songfeng;LI Qiang;ZHANG Shihong;XU Xing(CSG Extra High Voltage Power Transmission Company,Dali Bureau,Yunnan Dali 671000,China)

机构地区：[1]中国南方电网超高压输电公司大理局,云南大理671000

出　　处：《高压电器》2022年第8期117-126,共10页High Voltage Apparatus

基　　金：中国南方电网有限责任公司2021年第三批科技项目(定向项目)(强震区直流输电主设备韧性评估与地震应急关键技术研究及应用)。

摘　　要：作为换流站中的重要组成部分,直流场极母线回路的抗震性能直接影响到特高压输电线路的安全运行。为评估某±800 kV换流站中直流场极母线回路的抗震性能,文中建立了包含众多不同种类电气设备的极母线回路有限元模型,对其进行了动力特性分析和三向地震时程分析,通过与单体设备的地震响应对比得出了回路中的抗震薄弱位置和关键设备。并采用多样条的易损性分析方法结合多元非线性回归函数最小二乘拟合得到了回路和关键设备的地震易损性曲线,分析结果显示该回路在设防烈度(地面运动加速度峰值为0.4g)地震作用下失效概率已超过90%,因此关键设备的抗震性能亟待提升。As an important part in a converter station,the seismic performance of the DC field pole bus circuit(PBC)directly affects safe operation of UHV transmission line.For assessing the seismic performance of a DC field PBC of a±800 kV converter station,a finite element model of the PBC containing various types of electrical equipment is set⁃up in this paper,the dynamic characteristics analysis and three⁃way seismic time history analysis are performed.By comparing with the seismic response of single equipment,the vulnerable position and key equipment in the circuit are identified.Seismic vulnerability curves of the circuit and key equipment are obtained by using the multiple stripe analysis(MSA)method in combination with the multivariate nonlinear regression function fitting.The analysis results show that the failure probability of the PBC has exceeded 90%under the seismic action with a fortification intensity(the peak acceleration of ground motion is 0.4g),thus the seismic performance of the key equipment needs to be im⁃proved urgently.

关 键 词：特高压直流 极母线回路 地震响应 易损性分析 多元非线性拟合 

分 类 号：TM721.1[电气工程—电力系统及自动化] TU312.3[建筑科学—结构工程]