摘要
通过搭建三维电气几何模型,从理论上分析了侧向短针的工作机理以及影响因素。搭建输电线路实体模型来实际模拟山区输电线路走廊,并通过大量重复放电试验统计各工况下的试验绕击率。研究表明加装侧针可以大幅度地降低雷电绕击率,侧针长度与安装角度对保护效果都会造成影响。研究结果可以对塔头侧针在输电线路防雷改造中的应用与评估提供参考依据和理论支持。
In the paper, the operating principle and influential factors of lateral rod are analyzed theoretically through the establishment of three-dimensional electro-geometric model （ EGM ）. Furthermore, a large number of repetitive discharge tests are executed by the construction of some solid models that simulate transmission line corridors in mountainous area. The results indicate that the lateral rod can largely reduce shielding rate and that the protection effects are influenced by rod length and angle, which can be widely used as reference and support in practical appli- cation or lightning protection transformation assessment of lateral rod installation.
出处
《华东电力》
北大核心
2013年第6期1220-1224,共5页
East China Electric Power
关键词
500KV线路
侧向短针
雷电绕击率
EGM
500kV transmission line
lateral rod
lightning shielding rate
electro-geometric model （EGM）
