大跨高压覆冰输电线路风致动力响应研究  

Research on Dynamic response of the Large Span Icing Transmission Line Subjected to Wind Load

作　　者：纪冬梅[1] 姚秀平[1] 张莉[1] 赵大乐[1] 

机构地区：[1]上海电力学院能源与环境工程学院,上海200090

出　　处：《华东电力》2012年第10期1724-1729,共6页East China Electric Power

基　　金：上海市教委重点学科项目(J51304)

摘　　要：以某550 kV大跨越输电线路为研究对象,利用Ansys软件分析了不同覆冰厚度的输电导(地)线的静力响应、动力响应及导线覆冰时在不同攻角随机风速作用下的动力瞬态响应。计算结果表明:导线覆冰厚度为30 mm,地线覆冰厚度为15 mm时,导/地线的轴力已经接近了最大值;导线覆冰振动为面内振动;覆冰导线在随机风荷载作用下作面外振动,在不同攻角风荷载作用下,轴力、轴向位移及平面内y方向位移随攻角的变化较小,z方向位移随攻角变化最大,攻角越大振动幅值也越大。因此为了避免线路碰线,设计线路时应减少风速攻角。Taking a 550 kV transmission line as the research topic,the static response of the icing transmission line with different thick ice,dynamic response and wind induced vibration of the icing transmission line are analysed by using Ansys software.The calculation results show that the axial force will arrive at the allowance force when the thick of the ice is 15 mm for the ground wire,and 30 mm for the wire.From the calculations,it can be found out that the icing transmission line vibrates in the plane,while the icing transmission line subjected to stochastic wind load vibrates out of the plane.When the transmission line vibrates out of the plane,axial force and displacement in y direction changes little,in x direction changes a little,and in z direction changes largely with the change of the angle between wind and transmission line.So in order to avoid line＇s touching with each other,the angle of wind and transmission line should be designed in a small value.

关 键 词：大跨越 输电导(地)线 覆冰 随机风速 

分 类 号：TM753[电气工程—电力系统及自动化]