GIS分支母线防风性能研究

GIS因其占地面积小、应用范围广而受到人们的欢迎。目前,该系统已经在许多大城市中得到广泛的运用,并且已经是一条重要的生命线。GIS系统电压等级越大,其高度越大,其抗外界负荷的作用也就越小。以500 kV换流台GIS的机械特性为基础,利用最大平均风速和最大速度为外部载荷,得到套管、母线和支架的静力反应特性。分析结果显示,在10 min内,每一建筑物的最大荷载为33 m/s时,其应力和变形都存在着很大的安全余量。当最大瞬间风速为98 m/s时,仅有套管的应力不能达到设计的安全指标。

GIS is welcomed by people because of its small area and wide application. At present, the system has been widely used in many big cities, and has become an important lifeline. The higher the voltage level of GIS system is, the greater its height is, and the smaller its effect of resisting external load is. Based on the mechanical characteristics of 500kV converter GIS, the static response characteristics of casing, busbar and bracket are obtained by using maximum average wind speed and maximum maximum speed as external loads. The analysis results show that there is a large safety margin for stress and deformation when the maximum load of each building is 33 m/s in ten minutes. When the maximum instantaneous wind speed is 98 m/s, only the stress of the casing can not reach the designed safety index.