关于输电线路耐雷水平的综合研究分析

雷击是危及输电线路安全可靠运行的主要因素，深入研究输电线路的耐雷水平对保证电力系统的安全可靠运行具有重要的工程意义。介绍了输电线路的雷击类型，分别分析了杆塔接地电阻、线路档距、杆塔高度、导线电压、杆塔波阻抗对输电线路耐雷水平的影响，阐述了输电线路常用的防雷措施：架设避雷线、降低杆塔接地电阻、增设耦合地线、提高绝缘等级，为输电线路耐雷水平的深入研究打下基础。

Comprehensive Research and Analysis on Lighting Withstand Level of Transmission Line

Lightning stroke is the main factor that endangers the safe and reliable operation of transmission line. Therefore, the deep research on lightning withstand level of transmission line has the engineering significance on guaranteeing the safe and reliable operation of power system. The lightning strike types of transmission line are introduced, and the influences of grounding resistance of tower, line span, tower height, wire voltage and tower wave impedance on lightning withstand level of transmission line are analyzed respectively. The common protection measures against lightning are described including setting up overhead ground wire, decreasing the grounding resistance of tower, increasing coupling ground wire and improving insulation level, which lays a foundation for the deeper research on lightning withstand level of transmission line.