中文摘要：

地磁暴发生时导致地表产生感应电势（ESP）,ESP作用到高速铁路供电系统中的接地点,在牵引变压器、接触网、大地中形成地磁感应电流（GIC）,可能影响供电系统的安全运行。针对这个问题,从机理出发,分析了GIC侵入供电系统的可能性及对牵引变压器的影响。基于霍尔元件的＂GIC监测装置＂在京广高速铁路鹤壁东牵引变电所投入实测,将监测数据与国家天气监测中心、中科院空间环境预报中心发布的地磁暴数据进行对比,证明监测到GIC,其最大值达72A。这在中国高速铁路供电系统中第一次实际监测出GIC,为研究高速铁路供电系统中的GIC提供了直接证据。分析数据发现：地磁暴指数越大,GIC越大;当地磁暴达到一定水平之后,Kp指数增加,导致GIC呈超线性增加,值得高速铁路设计和运营管理部门的高度重视。

英文摘要：

Geomagnetic storm results in ESP（Earth Surface Potential）on the earth surface.The action of ESP on the ground point of high-speed railway traction power supply system causes the formation of GIC（geomagnetic induced currents）through the traction transformers,catenary and the earth,which may affect the safe operation of the power supply system.To address this issue,this paper analyzed the possibility of GIC intruding into the power supply system,and the impact of GIC on the traction transformer.The existence of GIC,up to 72 A,was detected after the Hall element based＂GIC Monitoring Device＂was applied in the Hebi Dong substation of the Beijing-Guangzhou high-speed railway and the monitoring data were compared with the data of the geomagnetic storm released by the National Satellite Meteorological Center,China Meteorological Administration and the Space Environment Prediction Center,Chinese Academy of Sciences.This is the first time GIC was actually detected in the power supply system of the high-speed railway in China,which provides the direct evidence for the study of GIC in the high-speed rail power supply system.Analysis of the data showed that the larger the index of geomagnetic storm,the greater the GIC was.After the storm reached a certain level,the increase of Kpindex led to a super linear growth of GIC.This conclusion is worth attention from high-speed railway design and operation management departments.