220kV同塔多回路线路防雷措施  

Lightning protection of 220kV multi-parallel lines on same tower

作　　者：谢小松[1] 袁奇[1] 朱炜[1] 

机构地区：[1]上海市电力公司超高压输变电公司,上海200063

出　　处：《上海电力》2010年第4期277-279,共3页Shanghai Electric Power

摘　　要：回顾了上海地区220kV输电线路2003-2008年的雷击跳闸情况,通过对同塔多回路线路的雷击跳闸统计分析与防雷数据验算,提出了220kV同塔多回路线路防雷措施:(1)杆塔的接地电阻低于5Ω时,无需通过减小接地电阻来提高线路的耐雷水平,但必须做好接地电阻的定期检测与改进防范;(2)尽量降低杆塔高度,对于线路中因跨越出现的特高杆塔,需进一步校核计算其防雷性能,采取有针对性的防雷技术措施;(3)建议地线保护角小于0°;(4)线路悬式氧化锌避雷器作为防雷的重要措施,应继续推广应用。This paper reviews the cases of lightning trip of 220 kV transmission line in Shanghai from 2003 to 2008, pro- poses the lightning protection of 220 kV multi-parallel lines on same tower through the lightning trip statistical analysis and lightning checking of multi--parallel lines on same tower. When the earthing resistance of the tower is smaller than 5~, it is not necessary to improve the stroke withstanding level of the line by reducing the earthing resistance, but the de- tection and improvement of the resistance must be well performed regularly. The height of the tower should be lowered as much as possible. For the Ultra high tower existing in the overhead line, further calculation need to be done to check its lightning protection performance and taking targeted lightning protection measurements. It is proposed that the ground line protection angle is less than 0°. The line hanging zinc oxide lightning arrester should continue to be applied as an important lightning protection measurement.

关 键 词：同塔多回路 防雷 措施 

分 类 号：TM866[电气工程—高电压与绝缘技术]