微地形和输电线路绕击故障关系的研究  

Study on the Relationship between the Microtopography and Shielding Failure of Transmission Lines

作　　者：李慧奇[1] 田东阁[1] 王平[1] 康淑丰[2] 张明旭[2] 

机构地区：[1]华北电力大学河北省输变电设备安全防御重点实验室河北保定071003 [2]国网河北省电力公司检修分公司河北石家庄050070

出　　处：《电瓷避雷器》2014年第3期73-78,83,共7页Insulators and Surge Arresters

基　　金：河北省电力公司科技项目(编号:kj2012-039)

摘　　要：微地形是影响500 kV输电线路绕击跳闸故障的重要因素之一,基于Google Earth软件研究了微地形因素对500 kV输电线路绕击耐雷性能的影响。首先介绍了基于Google Earth的输电线路KML文件的形成,再根据某网省公司历年500 kV输电线路绕击故障统计信息,将输电线路雷击故障点与沿线微地形相结合,对沿线微地形对雷击选择性的影响进行统计分析,找出故障分布的特点和规律,并详细分析农田水塘、山脊顶部、山坡及山谷地形条件下的典型事故,得出四种微地形因素影响500 kV输电线路的绕击耐雷性能的基本规律。Microtopography is one of the most important factors which affect the shielding failure of 500 kA transmission lines. Based on Google Earth, this paper researches on the rule of how microtopography affects the lightning protection performance. Firstly, the author introduces how to form the KML files of transmission line. Secondly, according to the lightning failure statistic in southern Hebei grid, the affects of microtopography on lightning selectivity are statistically analyzed. Typical accidents such as farm pond, ridge top, hillsides and valley terrain conditions are analyzed, and the basic law of how the four kinds of microtopography factors affect the lightning protection performance of shielding failure for 500kA transmission lines is found.

关 键 词：输电线路 绕击 微地形 雷击选择性 统计分析 

分 类 号：TM75[电气工程—电力系统及自动化]