220 kV单极SF_(6)断路器地震响应与减震控制  

Seismic Response and Vibration Control of 220 kV Single Pole SF_(6)Circuit Breaker

作　　者：曹枚根 夏祥泰 Cao Meigen;Xia Xiangtai(College of Civil Engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学,土木工程学院,北京100144

出　　处：《震灾防御技术》2024年第3期578-587,共10页Technology for Earthquake Disaster Prevention

摘　　要：变电站瓷柱类电气设备抗震性能较为薄弱,尤其是各电压等级的断路器不仅功能性强,价格昂贵,头部质量还重,地震易损性极高。建立了220 kV单极SF_(6)断路器及支架体系的有限元模型,开展断路器地震响应分析和抗震性能研究,评估了断路器及支架结构体系关键部位的地震响应特点。强震作用下断路器灭弧室顶部的加速度、位移响应较大,瓷柱根部应力超过现行规范要求,抗震性能不足。为提高断路器的抗震能力,对断路器进行减震控制,分别在支架底部、中间和顶部设置减震器,减震元件力学模型为双线性模型。对有、无设置减震器的断路器地震响应进行对比分析,结果表明,3种减震器布置方案对断路器都有不错的减震效果支架顶部方案最好,中部方案次之。考虑实际工程中在支架顶部布置减震器有一定的难度,可将减震器布置在支架中部。The seismic performance of substation porcelain column-type electrical equipment is relatively weak,particularly for circuit breakers across various voltage levels.These circuit breakers are not only crucial and costly but also have a significant head mass,making them highly vulnerable to seismic activity.To address this,a finite element model of a 220 kV single-pole SF_(6)circuit breaker and bracket system was developed to analyze its seismic response and assess its seismic performance.The study evaluated the seismic response characteristics of key components within the circuit breaker and bracket structure.The analysis revealed that the acceleration and displacement at the top of the circuit breaker interrupter chamber are significant under strong seismic action,and the stress at the base of the ceramic column exceeds the limits specified by current standards.As a result,the seismic performance of the circuit breaker is deemed insufficient.To enhance its seismic capacity,damping controls were introduced at the bottom,middle,and top of the bracket using shock absorbers.The mechanical model of the damping element followed a bilinear approach.A comparative analysis of the seismic response of the circuit breaker,both with and without dampers,showed that all three damper arrangements had a beneficial impact on reducing seismic vulnerability.Among these,the top-of-bracket arrangement proved to be the most effective,followed by the middle arrangement.However,due to practical difficulties in installing shock absorbers at the top of the bracket in real-world applications,the middle arrangement can be considered as a viable alternative.

关 键 词：SF_(6)断路器 地震响应分析 减震方案 效果分析 

分 类 号：TM561.3[电气工程—电器]