【摘要】 高铁轨道电路属于低压弱电系统。率先通过在河南鹤壁东牵引变电站中安装霍尔电流传感器,监测到并证实了地磁暴发生后,流入高铁轨道电路中地磁感应电流(GIC)的存在。利用Simulink软件仿真分析了GIC对高铁轨道电路的干扰,结果表明:在钢轨中流通的1.5 A不对称GIC将导致轨道继电器失压落下,造成铁路信号灯闪红。最后提出在相邻区段轨道电路中的扼流变压器牵引线圈中点连接线上加装电容器,来抑制GIC对高铁轨道电路的侵害,确保高铁安全运营。更多还原

【Abstract】 High-speed rail track circuit belongs to weak low voltage system. This paper takes the lead to install current sensors in Hebi East traction substation,thus GIC( Geomagnetically Induced Current) has been monitored and confirmed after geomagnetic storms happen. This paper uses Simulink simulation software to analyze GIC interference of high-speed rail track circuit. The results show that: 1. 5A asymmetrical GIC flowing in the rail will lead track relay to drop because of loss of voltage,causing lights flashing red. Finally,this paper suggests a capacitor installed on the midpoint connecting lines of choke transformer traction coil in the adjacent track circuit sections. The aim is to suppress the infringement of GIC for high-speed rail track circuit,to ensure the safe operation of high-speed rail.更多还原