1000kV特高压系统雷击保护的建模与仿真分析

Analysis of 1 000 kV UHV system lightning protection by modeling and simulating

利用国际通用的图形化电磁暂态计算程序ATP-EMTP对1 000 kV特高压系统雷击过电压进行了建模与仿真研究,分别建立了杆塔、输电线路、避雷器模型;进行了雷击杆塔及其母线、杆塔接地电阻对雷电过电压影响,以及变电站母线处安装避雷器对过电压的影响、串联电感对雷电过电压影响的仿真研究.仿真计算表明了避雷器在变电站防雷过程中的重要作用,还给出了过电压的分布、变化规律,为高压变电站雷击保护研究及其优化设计提供了有价值的参考依据和可行的工程方法.

Applying international common graphical electromagnetic transient program ATP-EMTP, and by modeling and simulating, the lightning overvoltage on 1000kV UHV system is studied. The power tower, transmission lines and lightning arresters are modeled individually. The influences of thunderstruck on tower and bus, the influences of tower grounding resistance to lightning overvoltage, as well as the substation bus arresters＇ influences to overvoltage and series inductors＇ influences to lightning over-voltage, are studied by simulating. Simulation and calculation show lightning arresters＇ important role for lightning protection in substation, The distributing and varying law of overvoltage are also given. This work provides valuable reference data as well as a practical engineering method for high voltage substation lightning protection research and its optimized design.