摘要
针对地处山区的超高压输电线路经常出现雷电绕击导线引起线路跳闸的现象,运用电气几何模型分析了500 kV同塔双回输电线路杆塔高度、地面倾角、风速等对绕击率的影响,提出了杆塔降阻、在易受绕击边相装设线路避雷器等针对双回线路的综合防雷措施,提高了输电线路的安全运行水平.
EHV Transmission Lines located on the mountain area often come forth the shielding failure,and the lines have been tripping operation frequently.With electro-geometric model,by analyzing tower height,the ground angle,as well as the wind speed of shielding failure of 500 kV double-circuit transmission line,meanwhile,some proper lightning resisting measures are presented,by reducing grounding resistor,equipping a single metal-oxide surge arrestor(MOA) on the outside phase easy to be struck by lightning,and so...
出处
《华北水利水电学院学报》
2009年第2期57-59,共3页
North China Institute of Water Conservancy and Hydroelectric Power
关键词
同塔双回线路
绕击
耐雷水平
防雷措施
double circuit transmission line
shield failure
lightning protection level
lightning protection measure
