摘要
详细地介绍了计及风偏和地面倾角的电气几何模型(EGM)法原理和有关公式,并以某500 kV输电线路为模型,计算不同大小风速、地面倾角和杆塔保护角对线路绕击跳闸率的影响。最后就输电线路防雷提出加强绝缘设计,采用V型绝缘子串,减小杆塔保护角等措施来降低线路绕击跳闸率。
In this paper,the electric geometry model（EGM） concernning wind and slope is being used to measure the lightning protection performance of shielding failure for transmission line.Firstly,it introduce the main principle and some computational formula of this theory.Then,a 500kV transmission line model is used to calculated the influence of wind,slope and shielding angle.In the end of this paper,some suggestion is proposed to reduce the shielding failure flashover rate.
出处
《电力科学与工程》
2010年第9期36-39,共4页
Electric Power Science and Engineering
