中文摘要：

通过对110 kV和220 kV单条输电线和同杆并架双回输电线路的防雷性能的仿真和计算,分析研究在多种雷击方式下输电线路的耐雷水平。采用国际通用的电力系统电磁暂态分析的仿真软件Elector-Magnetic Transient Program（EMTP）,对雷电侵入波在输电线路上所产生的过电压进行分析计算,得出过电压分布和变化的规律,进而从技术上和经济上限制雷电侵入波过电压。

英文摘要：

This paper presented a simulation and analysis of the lightning protection performance of single and double circuit 110 kV and 220 kV transmission lines on the same tower,and studied the lightening withstand level under multiple lightening strikes.The overvoltage occurred on the transmission line due to the lightening was calculated and was analyzed with the Elector-Magnetic Transient Program（EMTP）,an advanced electromagnetic transient calculation tool commonly was used internationally.Laws of the over-voltage＇s distribution and changes were identified,so that measures could be taken to restrict lightning over-voltage both technically and economically.