摘要
运用电气几何模型(EGM)的方法来分析超/特高压交流输电线路的绕击耐雷性能,并给出了计及导线工作电压的绕击耐雷水平和绕击跳闸率计算式。然后,再对影响超/特高压输电线路绕击耐雷特性的雷电流幅值、杆塔高度、线路绝缘水平,线路所经过的地形、保护角、工频瞬时电压、地面植被等主要因素做了分析研究。
Electro- geometric model（ EGM） is used to analyze the lightning protection performance of shielding failure for UHV / EHV transmission lines,and the formula for calculating the lightning shielding failure withstand level and the shielding failure trip- out rate is given which considers the effects of conductor operation voltage. Then,the main factors which would impact the lightning shielding failure performance for UHV / EHV transmission lines are analyzed and studied,such as lightning current amplitude,tower height,insulation level of lines,landforms along the transmission line corridor,the protection angle of tower,power- frequency voltage and ground vegetation.
出处
《四川电力技术》
2015年第3期15-22,共8页
Sichuan Electric Power Technology
关键词
超特高压
输电线路
耐雷性能
电气几何模型
绕击跳闸率
EHV / UHV
transmission line
lightning protection performance
electro-geometric model
shielding failure trip-out rate
