中文摘要：

利用有限元软件Ansys建模进行模态分析,得出电气元件各阶自振频率和振型.根据抗震规范规定的地震动参数,采用振型分解反应谱法计算各电气元件最不利截面应力的均值和方差.应用一次二阶矩理论,计算电气元件在给定地震作用下的抗震可靠度.采用网络系统的分析方法,计算变电站在给定地震作用下的3个准则的抗震可靠度.通过工程实例分析了武汉市主城区变电站系统的抗震可靠性,并给出了提高变电站子系统抗震可靠性的方法和措施.

英文摘要：

Finite element software Ansys was used to model the electrical components.The natural frequency and the mode of vibration of the electrical components were determined.According to the ground motion parameters,the mean and variance of the stress of the most disadvantageous section of the electrical components were calculated by the strikeout decomposition response spectrum method.The seismic reliability of electrical components under a given seismic intensity was also calculated by the first-order reliability method.And then the analysis method of network system was employed to work out the seismic reliability of three criteria of the substation system under a given seismic intensity.Through the practical engineering examples,the seismic reliability of the substation subsystem in Wuhan city was analyzed,and the methods and measures were provided to improve the seismic reliability of substation subsystems.