高压输电线风雨激振特性研究及数值分析  

Model of rain-induced vibration of transmission line and numerical analysis

作　　者：周超[1] 芮晓明[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《振动与冲击》2013年第6期173-175,194,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51205128);中央高校基本科研业务费资助(11QG07)

摘　　要：高压输电线风雨激振严重威胁着输电线路的寿命和安全运行,其激振机理及防治措施成为电力系统急待研究的难题之一。在降雨、风载和电场作用下,在输电导线表面形成极化水线,水线的运动诱发气动力变化导致输电线线路振动。建立了水线运动与输电导线振动耦合的风雨激振理论模型。采用龙格-库塔法对输电导线和水线运动方程进行数值求解,得到了输电导线和水线的响应,讨论了风速、导线结构阻尼和电场力等参数对输电导线振幅的影响。Ionic wind may be generated by corona discharging of transmission line, and the vortex-induced vibration of transmission line may be excited. In order to study the characteristics of the vibration, the field strength of corona and the mechanism of ionic were studied, and the equation of corona vortex-induced vibration was established. Using Runge-Kutta method to calculate the vibration response of the 220KV cable, the impacts of air humidity and density, conductor surface conditions, cable structure factors and tensions on the vibration amplitude were analysed. The conclusions, can be used as references for designing UHV transmission lines, upgrading existing lines and controlling vibration.

关 键 词：风雨激振 输电线路 水线 振动 

分 类 号：TH212[机械工程—机械制造及自动化] TM751[电气工程—电力系统及自动化]