220kV长电缆—GIS系统雷电侵入波计算分析

Analysis and treatment of negative axial thrust on Unit 3 of Maoming Power Plant

从分析计算得出220kV长电缆—GIS系统雷电侵入波保护特性，并讨论了影响过电压的因素，为变电站防雷设计提供了参考依据。

This paper derives the protection characteristics of thunder intrusion of 220kV long cable-GIS system from analyses and calculations, and discusses the influential factors to overvoltage. It provides valuable results for lightning protection design of substations.