带过渡段塔腿输电塔在1000 kV特高压交流工程中应用研究

Applicative Study of Transmission Tower with Transition Legs in 1000 kV UHV AC Transmission Line Project

特高压交流工程重输电塔基础根开尺寸和作用力均比常规线路大,为满足山区特高压输电线路40°以上陡峭地形要求,推荐采用带过渡段塔腿输电塔。以实际工程设计为背景,采用Midas Gen对自振特性、内力、位移进行计算分析,与SmartTower设计软件对比应用研究,分析结果可验证设计方法的合理性,对带过渡段塔腿输电塔特高压交流工程设计提供设计建议。

The root size and bearing force of heavy towers for UHV transmission lines are larger than towers in common lines.In order to meet the requirements of steep terrain above 40°for UHV transmission lines in mountainous areas,transmission towers with transition legs are recommended.Based on the background of actual engineering design,Midas Gen is used to calculate and analyze the natural vibration characteristics,internal force and displacement.Compared with SmartTower design software,the analysis results can verify the rationality of the design method,and provide suggestions for the design of the UHV AC projects.