1000kV输电线路绕击耐雷性能研究  

Lightning Protection Performance of Shielding Failure of 1 000 kV Transmission Line

作　　者：彭谦[1] 

机构地区：[1]国核电力规划设计研究院,北京100095

出　　处：《华东电力》2012年第10期1777-1780,共4页East China Electric Power

基　　金：国家核电技术公司项目(SNP-KJ-CX-2012-6)~~

摘　　要：应用电气几何模型,分析了1 000 kV特高压输电线路的绕击耐雷性能。研究了一种改进电气几何模型法,根据不同的雷电流,计算屏蔽弧、暴露弧的对地投影长度,并计算相应条件下的绕击跳闸率。以淮南—皖南—浙北—沪西1 000 kV特高压输电线路工程为例,分析地形、保护角和铁塔呼高对线路耐雷性能的影响。计算结果表明,线路在平原地区的绕击耐雷性能最优,山地最差;线路的绕击跳闸率随保护角和铁塔呼高增大而增大。另外,根据计算结果,推荐了1 000 kV淮南—沪西特高压线路工程的保护角取值。In this paper,the electrical geometry model is used to analyze the lightning protection performance of shielding failure of 1000kV transmission line.Firstly,a modified electrical geometry model algorithm is presented to calculate the projection length of shield and exposure arc for different lightning current,as well as the corresponding shielding failure trip-out rate.Then,based on Huainan-Wannan-Zhebei-Huxi 1000kV UHV transmission line project,the impacts on the lightning protection performance of shielding failure is analyzed in terms of different terrain,shielding angle and tower height.As shown by the calculation results,the performance is best in plain areas,while worst in mountainous areas;the shielding failure trip-out rate increases with shielding angle and tower height′s increment.Finally,the value of shielding angle is recommended for Huainan-Huxi 1000kV UHV transmission line project.UHV;1000kV transmission line;lightning stroke;electrical geometry model algorithm

关 键 词：特高压 1000KV输电线路 雷击 电气几何模型法 

分 类 号：TM86[电气工程—高电压与绝缘技术]