500kV变电站雷电过电压的仿真研究  

Simulation Research on Lightning Over-voltage of 500kV Substation

作　　者：相龙阳[1] 彭春华[1] 刘刚[1] 

机构地区：[1]华东交通大学电气与电子工程学院,江西南昌330013

出　　处：《电力科学与工程》2011年第2期30-35,共6页Electric Power Science and Engineering

摘　　要：将500 kV变电站和进线段结合起来,考虑远近区杆塔冲击接地电阻、进线段冲击电晕、雷击点与变电站的距离等影响因素,采用EMTP-ATP对500 kV变电站的雷电侵入波过电压进行了仿真研究。研究表明,冲击电晕、近区杆塔接地电阻对雷电过电压的大小有较大的影响;当设备过电压较严重时,母线上增装一组避雷器可有效降低雷电过电压;最后,提出在主变避雷器前串联电感,以抑制雷电侵入波的陡度。该研究考虑到通过降低雷电侵入波的陡度来提高变电站防雷保护的安全性和可靠性,同时兼顾经济性,可为工程提供参考。This paper combines incoming lines with a 500 kV substation to investigate the lightning over-voltage of 500 kV substation via EMTP-ATP simulation program with respect to the influences of impulse grounding resistance of tower,impulse corona of incoming lines,and position of lightning.The result shows that impulse corona and grounding resistance of the tower which is close to the substation exert great influence on over-voltage;a group of arresters installed on bus can decrease the over-voltage effectively when theover-voltage of the equipment is very serious.At last,a method of fixing series inductor in front of the transformer arrester is presented,to restrain the steepness of lightning inrush over-voltage.The study into account by reducing the steepness of lightning invasion wave to increase the substation lightning protection of the safety and reliability,and taking into account the economic front,provide reference for the new project.

关 键 词：变电站 EMTP-ATP 冲击电晕 接地电阻 雷击点 串联电感 

分 类 号：TM862[电气工程—高电压与绝缘技术]