架空线路防绕击避雷针实用化技术

为了探讨输电线路防雷新技术、新方法,降低雷击电跳闸率,结合国内外输电线路及特高压的运行经验,着重分析了引起高压输电线路故障跳闸的主要原因—雷电绕击问题,并在输电线路防雷经典理论的基础上,利用电气几何模型和雷电先导理论的最新成果,研究了架空线路防绕击避雷针实用化技术。研究表明,在架空地线上合理装设防绕击避雷针,可有效地增强其屏蔽性能和引雷作用,将可能遭受的绕击控制转化为反击,大幅度降低雷击故障跳闸率。实际运行的情况和初步取得的效果为输电线路防雷治理及特高压电网建设积累了经验。

Application Technique of Lightning Rod for Lightning Shielding Failure Prevention of Overhead Electric Power Transmission Line

This paper combines operation experiences of the foreign and domestic electric power transmission lines and ultra high voltage,and analyzes the lightning shielding failure which is the reason of high voltage electric power transmission line failure trip thoroughly.Based on the classical theory of electric power transmission line lightning prevention,this paper utilizes the last achievement of electric geometry model and lightning leader theory,and researches the application technique of lightning rod for lightning shield failure prevention of overhead electric power transmission line.The method of this kind of lightning rod in overhead grounding line reasonably can increase the shielding performance and lightning attracting effect,convert possible lightning shield failure into hit-back lightning to control it,and decrease the lightning failure trip rate.This paper also introduces the operation status and effect of this lightning rod,and accumulates the precious experiences in the lightning prevention and construction of ultra high voltage grid.