计及风偏和地面倾角的线路绕击耐雷性能研究  

Study on Lightning Protection Performance of Shielding Failure for Transmission Line with Improved EGM

作　　者：张瑚[1] 黄欲成[1] 何妍[2] 马丽山[3] 

机构地区：[1]中南电力设计院,湖北武汉430071 [2]国网电力科学研究院,湖北武汉430074 [3]青海电力科学试验研究院,青海西宁810008

出　　处：《电力科学与工程》2010年第9期36-39,共4页Electric Power Science and Engineering

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.

关 键 词：绕击 电气几何法 风偏 地形 

分 类 号：TM863[电气工程—高电压与绝缘技术]