改进电气几何模型计算输电线路绕击率  

Calculation of Shielding Failure on Transmission Line by Improved EGM

作　　者：王晓彤[1] 施围[1] 刘文泉[2] 

机构地区：[1]西安交通大学 [2]青海电力试验研究所

出　　处：《高电压技术》1998年第1期85-87,共3页High Voltage Engineering

摘　　要：利用改进的电气几何模型，计算分析了输电线路杆塔结构，避雷线和导线的布置，雷电流的幅值和雷电流入射角，以及地面倾角对绕击率的影响。算例表明了绕击率的变化趋势。在杆塔合理的结构下调整杆塔参数，使绕击率减小，可为设计线路部门提供依据。This paper deals with shielding failure of the transmission lines with many parameters by the improved electrogeometrical model(EGM). The parameters consist of the tower structure, phase wires, shield wires, the lightning current amplitude, angle of the lightning incidence, as well as the ground angle. The results of studies show the shielding failure rate is a function of shielding angle, strokes lightning amplitude and ground angle. It will help designers in making the correct economic judgment.

关 键 词：绕击率 保护角 电气几何模型 输电线路 过电压 

分 类 号：TM863[电气工程—高电压与绝缘技术] TM726