【摘要】 大型变电站作为电力系统的重要组成部分,近年来其建设速度及规模呈现不断上升的趋势。以往大型变电站结构设计中未考虑电气设备与主厂房结构的相互作用,计算结果不够准确。以国家电网公司推荐的典型变电站作为研究对象,建立考虑主厂房结构与电气设备相互作用的变电站主厂房有限元模型,经过动力特性分析后发现,随着电气设备与主厂房结构质量比的改变,电气设备对主厂房结构存在不同程度的影响。另选取不同震中距和震级的100条实际地震记录,在电气设备与主厂房结构不同质量比及电气设备不同摆放形式等工况条件下,分别以主厂房结构层间位移角和地面峰值加速度作为地震需求参数和地震动参数,建立主厂房地震需求模型,最终得到变电站主厂房地震易损性曲线,该曲线可用于评估变电站的抗震性能水平,并为变电站灾前预测及灾后加固提供理论依据。更多还原

【Abstract】 As the essential part of a power system,the construction of large substations has an increasing trend in recent years.Without considering the interaction between the main structure and electric equipments,previous calculation results of substations may not be accurate enough.According to the typical substation design recommended by State Grid Corporation,a finite element model of main structure taking such interaction into account was established.The finite element analysis shows that the dynamic characteristics of electrical equipments have obvious impact on that of main structure.Moreover,100 practical earthquake records with different epicentral distance and magnitude were selected to analyze the seismic response of substation,in which the mass ratios of equipments to structure as well as the arrangements of the equipments are different.The seismic demand model of substation was established with the inter-story displacement angle as the earthquake demand parameters and the Peak Ground Acceleration(PGA) as the ground motion parameters.The seismic vulnerability curves were then obtained,by which the seismic performance level of substations may be assessed and the seismic capacity of the structures before and after earthquake disasters may be theoretically supported.更多还原