雷电拦截新技术在高压输电线路的应用研究

Application Analysis of New Lightning Interception Technology in High-voltage Transmission Line

摘要:

输电线路雷电防护主要依据电气几何模型-保护角法进行设计，是用一次放电（单脉冲）、多次重复实验统计得出。雷击放电包含多个脉冲，单脉冲放电不能完全反映雷电多脉冲放电的物理过程。文中采用CIGRE授权出版的《雷电参数的工程应用》中的观测数据，给出了雷电放电的5个阶段及主要物理参数，同时就避雷针与雷电拦截器对雷电的接闪过程物理参数进行计算。最后，比较分析现有高压输电线路防雷技术的特点和局限性，提出了雷电拦截新技术的应用方法。

Abstract:

The lightning protection of transmission line is designed mainly based on electrical geometric model-protection angle method, and it is obtained by the statistics of a discharge (one pulse) and many repeated experiments. Single lightning discharge contains multiple pulses, and single pulse discharge can not truly reflect the physical process of lightning multi-pulse discharge. Five stages of lightning discharge and main physical parameters are given according to the observation data in "Lightning Parameters for Engineering Applications" authorized by CIGRE, and meanwhile, the physical parameters of tower lightning rod and lightning interceptor against lightning are calculated. Finally, the characteristics and limitations of the existing lightning protection technologies for high-voltage transmission line are compared and analyzed, and a new application method of lightning interception technology is proposed.