基于三维隔震支座的换流变压器地震响应分析  

Seismic Responses Analysis of Converter Transformer Based on Three⁃dimensional Seismic Isolation

作　　者：何堃宁 邓扬阳[2] 谢靖 谢强[1] HE Kunning;DENG Yangyang;XIE Jing;XIE Qiang(College of Civil Engineering,Tongji University,Shanghai 200092,China;Tianjin Chengjian University,Tianjin 300192,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]天津城建大学,天津300192

出　　处：《高压电器》2025年第4期150-158,共9页High Voltage Apparatus

基　　金：国家重点研发计划项目(2022YFF0608904);国家自然科学基金项目(51878508)。

摘　　要：换流变压器作为换流站内的核心设备,其水平斜向伸出箱体的阀侧套管受竖向地震作用影响显著。为提高换流变压器的抗震性能,提出由滑动摩擦摆水平隔震系统、弹簧—粘滞阻尼器竖向隔震系统、抗摇摆装置组成的三维隔震支座,并将其应用于±800 kV换流变压器,通过有限元数值模拟,计算并分析了设置隔震支座前后换流变压器的地震响应。结果表明:三维隔震支座显著降低了阀侧套管水平向和竖向加速度响应;相较于水平隔震,设置三维隔震系统的阀侧套管根部应力隔震效率提升了约12%;隔震体系位移响应主要集中在支座,上部结构尤其是套管自身位移相比于隔震前显著减小。该型三维隔震支座有效提高了换流变压器抗震性能,在高烈度地区具有良好的适用性。Converter transformer is the core equipment in converter station and its valve-side bushing,which extends horizontally and obliquely from the oil tank,is significantly affected by vertical seismic action.For enhancing the seis-mic performance of the converter transformer,a three-dimensional seismic isolation system,consisting of a sliding friction pendulum horizontal isolation system,a spring-viscous damper vertical isolation system and an anti-rocking device,is proposed.This isolation bearing is applied to a±800 kV converter transformer.The seismic responses of the converter transformer before and after the installation of the seismic isolation system are calculated and analyzed through finite element numerical simulation.The results show that the three-dimensional seismic isolation significant-ly reduces the acceleration responses of the valve-side bushing at horizontal and vertical directions.Compared to hori-zontal isolation,the stress isolation efficiency at the root of the valve-side bushing of the three-dimensional isolation system is increased by approximately 12%.The displacement responses of the isolation system are mainly concentrat-ed at the bearings,and the displacement of the upper structure,with the busing in particular,is significantly reduced than before isolation.The three-dimensional seismic isolation effectively enhances the seismic performance of the converter transformer and has excellent applicability in regions with high seismic intensity.

关 键 词：换流变压器及套管 水平隔震 三维隔震 地震响应 隔震效果 

分 类 号：TM41[电气工程—电器]