硬管母联接的500kV避雷器和互感器耦联体系地震模拟振动台试验研究  

Earthquake Simulation Shaking Table Test on Coupling System of 500 k V Surge Arrester and Instrument Transformer Interconnected With Rigid Tube Bus

作　　者：程永锋[1] 朱祝兵[1] 卢智成[1] 李圣[1] 邱宁[2] 钟珉[1] 

机构地区：[1]中国电力科学研究院,北京市西城区100055 [2]国家电网公司,北京市西城区100031

出　　处：《电网技术》2016年第12期3945-3950,共6页Power System Technology

基　　金：国家电网公司重大科技项目(GCB17201500063)~~

摘　　要：国内外历次大震的震害经验表明,相互联接的电气设备具有较强的地震耦合效应,地震易损性明显。为研究互联设备的地震耦合机理,提高互联电气设备的抗震设计水平,以硬管母联接的500 kV避雷器和互感器为研究对象,采用地震模拟振动台试验手段,研究了地震动输入峰值加速度、硬管母与设备间的联接方式、滑动金具滑动槽长度等因素对回路中设备地震反应规律的影响。研究结果表明,硬管母联接使设备产生了明显的动力耦合效应,电气设备通过硬管母联接后,在管母联接方向高频设备的频率降低,低频设备的频率增高。地震动输入峰值加速度越大,滑动金具滑动槽长度越小,设备间的耦合效应越明显。在进行硬管母联接设备的抗震设计时,宜根据单体设备在地震作用下的位移估算结果设计滑动金具滑动槽长度,提出了减小设备地震耦合效应的金具滑动槽长度计算公式。Experiences of earthquakes in China and other countries demonstrate that vulnerability of interconnected electrical equipment is very high, and the equipment exhibits strong seismic coupling effect. To investigate mechanism of seismic coupling effect and improve equipment＇s seismic performance, a coupling system of a 500 kV surge arrester and an instrument transformer interconnected with a rigid tube bus was studied through earthquake simulation shaking table test. Factors affecting seismic response of electrical equipment were investigated, including peak ground motion acceleration, connection mode between rigid tube bus and equipment, and length of fitting＇s sliding slot. Research results show that equipment interconnected with the bus exhibits strong dynamic coupling effect. On connecting direction, frequency of high-frequency equipment decreases, while frequency of low-frequency equipment increases. Moreover, coupling effect between equipment increases with increase of peak ground motion acceleration or decrease of sliding slot length. To reduce coupling effects between equipment, a length calculation formula is introduced to help designing length of fitting＇s sliding slot.

关 键 词：500 kV电气设备 硬管母联接 地震模拟振动台 耦合效应 

分 类 号：TM721[电气工程—电力系统及自动化]