摘要
为研究用于特高压变电站的170 kV中性点电抗器的抗震性能,对1台真型170 kV中性点电抗器进行地震模拟振动台试验。通过输入白噪声随机波和标准时程波,得到试件的动力特性和在峰值加速度分别为0.15g、0.3g和0.4g地震作用下关键部位的加速度、应变和位移响应。试验结果显示,170 kV中性点电抗器基频为13.27 Hz,高压套管基频为5.85 Hz;试件高压套管升高座动力放大系数大于规范要求值;在设计基本地震加速度为0.4g的标准时程波作用下,高压套管、中性点套管及储油柜连接部件最大应力均满足要求。试验结果表明,170 kV中性点电抗器主要部件设计强度满足设计基本地震加速度0.4g的抗震要求,但高压套管及储油柜位移较大,设计时应考虑位移对导线的牵引作用。
In order to study the aseismic behavior of a 170 kV neutral reactor used in an UHV substation,one such reactor was tested with a seismic simulation shaking table.The dynamic characteristics of the reactor were obtained through inputting white noise and the standard time history waves.The acceleration,strain and displacement responses of its key positions under the action of earthquake waves with peak accelerations of 0.15 g,0.3 g and 0.4 g were obtained,respectively.Test results showed that the fundamental natural frequency of the reactor is 13.27 Hz,and that of its high voltage bushing is 5.85 Hz; the dynamic amplification factor of the ascending flanged base of the high voltage bushing is larger than the code prescribed value; under the action of the standard time history waves with the designed basic acceleration of 0.4 g,the maximum stress of the high voltage bushing,the neutral point bushing and connecting components of the oil storage tank meet the code requirements; the designed strength of the reactor＇s main components meet the aseismic requirements under the designed basic seismic acceleration of 0.4 g; displacements of the high voltage bushing and the oil storage tank are larger,the traction effects of displacements on conductors should be considered during design.
作者
孙宇晗
程永锋
卢智成
林森
张谦
高坡
SUN Yuhan;CHENG Yongfeng;LU Zhicheng;LIN Sen;ZHANG Qian;GAO Po(China Electric Power Research Institute, Beijing 100055, China)
出处
《振动与冲击》
EI
CSCD
北大核心
2018年第13期229-234,共6页
Journal of Vibration and Shock
基金
中国电科院创新基金项目(GC83-17-004)
关键词
中性点电抗器
抗震性能
振动台试验
高压套管
储油柜
动力特性
地震响应
动力放大系数
neutral reactor
aseismic performance
shaking table test
high voltage bushing
oil storage tank
dynamic characteristics
seismic response
dynamic amplification factor
