地震作用下换流变压器阀侧套管的温度场仿真与响应分析  

Simulation and Response Analysis on Temperature Field of Valve Side Bushing of Converter Transformer Under Seismic Action

作　　者：刘玉安 毛宝俊 陈云龙 谢强[1,2] 刘匀[1] LIU Yu’an;MAO Baojun;CHEN Yunlong;XIE Qiang;LIU Yun(College of Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Performance Evolution and Control for Engineering Structures of Tongji University,Ministry of Education,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学工程结构服役性能演化与控制教育部重点实验室,上海200092

出　　处：《高压电器》2025年第4期30-38,共9页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(51878508)。

摘　　要：换流变压器阀侧套管作为电力设备中的关键部件,其安全运行对电力系统的可靠性至关重要。为探究地震作用对换流变压器阀侧套管温度场的影响,文中建立了±800 kV换流变压器及套管体系的精细化有限元仿真分析模型,开展换流变阀侧套管地震响应分析,研究震后阀侧套管表带触指型电连接结构的残余变形与残余应力,基于电连接结构接触电阻计算公式计算接触电阻,分析震后阀侧套管的温度变化。结果表明:触指叶片在地震作用下产生残余变形,接触应力下降,接触电阻上升。由于表带触指的环形结构导致不同位置叶片的变形程度不一致,这种非均匀性造成电阻在触指各区域的分布差异。电流集中流向电阻较低的区域,导致电连接结构负载重新分布,引起整体和局部温度升高,对系统的热稳定性和电能传输效率构成风险。研究结果揭示了地震作用对换流变压器阀侧套管温度场的影响,为提高换流站的抗震设计和运行维护提供了理论依据和技术支持。The valve-side bushing of converter transformer is a key component in electrical equipment and its safe operation is crucial for the reliability of power system.For exploring the impact of seismic action on the temperature field of the valve side bushing of converter transformer,a detailed finite element simulation model for the±800 kV converter transformer and bushing system is set up in this paper to develop seismic response analysis of valve side bushing of converter transformer,study the residual deformation and residual stress of lamella contact finger electri-cal connection structure of the valve side bushing after the seismic,calculate the contact resistance based based on the contact resistance calculation formula of electrical connection structure and analyze temperature variation of the valve side bushing after seismic.The result shows that under the seismic action the contact finger is deformed,the contact stress is decreased and contact resistance is increased.Since the ring-shaped structure of the lamella contact finger results in inconsistency of degrees of deformation of contact finger at different positions,causing distribution difference of the resistance at reach area of the contact finger.The current is concentrated in the area with low resis-tance,leading to a redistribution of the electrical connection structure and resulting in both overall and partial tem-perature increases and posing a danger to the thermal stability and power transmission efficiency of the system.The study result reveals the impact of seismic action on the temperature field of the valve-side bushing of converter trans-former and provides theoretical basis and technical support for improving seismic design and operation as well as maintenance of converter station.

关 键 词：阀侧套管 地震作用 残余变形 温度场仿真 

分 类 号：TM721.1[电气工程—电力系统及自动化]