摘要
在发生地震灾害时,变电站中电瓷型电气设备如断路器、互感器等易发生破坏。为保证电气设备在地震荷载作用下能够安全正常工作,以某110 kV断路器为研究对象,对其进行原位动力特性测试和有限元建模,采用拉索连接的电涡流阻尼惯容系统对在运的断路器进行减震改造设计并进行了工程应用,对设备减震改造前后的模态响应和地震响应进行了计算和分析。结果表明:在地面峰值加速度为0.4g的地震荷载作用下,使用惯容系统对断路器进行改造,可以使套管根部应力减小44%,位移峰值减小47%,实现约40%的减震效率。应用惯容系统是提高断路器结构抗震性能的有效措施。
In the event of an seismic disaster,the porcelain type electrical equipment in substation such as circuit breakers and instrument transformers are prone to damage.For assuring safe and normal operation of the electrical equipment under the action of seismic loads,a 110 kV circuit breaker is taken as the research object,of which the in⁃situ dynamic characteristics test as well as finite element modeling are performed.The operated circuit breaker is subject to shock absorbing retrofit design and the engineering application is performed by using the cable bracing ed⁃dy current inerter system.The modal response and seismic response of the equipment before and after the shock ab⁃sorbing retrofit have been calculated and analyzed.The results show that under the seismic load with the ground peak acceleration of 0.4g,use of the inerter system to retrofit the circuit breaker can reduce the stress at the bottom of the bushing by 44%,the peak displacement by 47%,and achieve a shock absorbing efficiency of about 40%.The use of inerter system is an effective measures to improve the seismic performance of circuit breaker structure.
作者
薛松涛
车兴儒
谢丽宇
XUE Songtao;CHE Xingru;XIE Liyu(Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China;Department of Architecture,Tohoku Institute of Technology,Sendai 982-8577,Japan)
出处
《高压电器》
CAS
CSCD
北大核心
2022年第8期175-182,共8页
High Voltage Apparatus
基金
政府间国际科技创新合作重点专项(2021YFE0112200)
上海市自然科学基金面上项目(20ZR1461800)。
关键词
断路器
惯容器
电涡流阻尼
地震作用
减震
circuit breaker
inerter
eddy current damping
earthquake
shock absorbing
