摘要
大量震害数据显示,高压电瓷型电气设备的地震易损性极高,在地震作用下,电气设备的瓷绝缘子根部最易发生破坏,进而导致设备失效、乃至电力系统失效。为了更加合理地描述该类设备在地震作用下的不确定性,并准确评估该类设备的抗震性能,文中以某220 kV电压互感器为研究对象,通过基于概率的易损性分析方法,考虑了4类不同类型的地震动,选用了峰值地面加速度和设备基本自振频率处对应的谱加速度做为地震动强度度量指标,给出了该220 kV电压互感器的多种易损性曲线。和传统的确定性方法相比,文中获取的易损性曲线可以更加合理地评估该类设备的地震易损性,可以更好地用于变电站系统的抗震韧性评估。
A large number of earthquake damage data shows that the seismic fragility of high-voltage porcelain electrical equipment is very high.The porcelain insulation root of electrical equipment is the most vulnerable under earthquakes,which leads to the failure of corresponding equipment and even the related power system.In order to more reasonably describe the uncertainty of this kind of equipment and accurately evaluate the seismic performance of such equipment,this paper takes a 220 kV potential transformer as the research object.Four different types of ground motions are considered.The peak ground acceleration and the spectral acceleration corresponding to the natural vibration frequency of equipment are chosen as the metrics of ground motion intensity.Various fragility curves of the 220 kV potential transformer are given.Compared with the traditional deterministic method,the fragility curves obtained in this paper can not only evaluate the seismic fragility of such equipment more reasonably,but also be used to evaluate the seismic resilience of substation system.
作者
杜思敏
柏文
戴君武
胡扬
DU Simin;BAI Wen;DAI Junwu;HU Yang(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin 150080,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2023年第1期189-196,共8页
Earthquake Engineering and Engineering Dynamics
基金
中国地震局工程力学研究所基本科研业务费专项(2019B01,2019C09)
国家自然科学基金项目(52008382)。
关键词
电容式电压互感器
有限元分析
振型分解反应谱法
地震易损性
capacitor voltage transformer
finite element analysis
mode-superposition response spectrum method
seismic fragility
