陕南、陕北山区架空输电线路防雷技术措施的应用

陕西电网330 kV线路雷击跳闸事件主要集中在陕南、陕北地区,其雷击闪络次数占全省闪络次数的95.7%.通过对陕南、陕北地区输电线路雷击跳闸规律的分析,提出330 kV线路以防绕击为重点的防雷思路.根据不同重点确定不同的防雷措施,并对各种措施进行了评估、分析,提出输电线路防雷改造应根据线路走径的地形特点和雷击跳闸的原因采取相应措施,防雷措施应遵循因地制宜和综合治理的方针.

Application of Lightning Stroke Protection Measures for Power Transmission Lines in Mountainous Areas of Southern and Northern Shaanxi

The lightning stroke tripping on 330 kV transmission lines in Shaanxi power grid mainly occurs in southern and northern Shaanxi, lightning flashover frequency in these areas is 95.7% of the total flashover frequency in Shaanxi. Through the analysis of the lightning stroke tripping law on power transmission lines in southern and northern Shaanxi, the lightning stroke protection methods which emphasize lightning protection of shielding failure for 330 kV transmission lines are proposed. Various lightning stroke protection measures are determined according to different emphasis, then these measures are analyzed and evaluated; based on which, this paper proposes the lightning stroke protection reform should adopt the appropriate measures according to the geological features of the line route and the cause of the lightning stroke tripping, as well as the lightning stroke protection measures must follow the local conditions and comprehensive treatment.