强磁暴对轨道电路的影响分析

磁暴是太阳活动时磁层-电离层的电流体系和地球磁场的相互作用而产生的,磁暴来袭时,时变磁场将在地面感应出电场,在一些技术系统(铁路设备、输电线路、石油和天然气管道等)中产生地磁感应电流(GIC),干扰了这些系统的正常工作。对1982年7月13—14日强磁暴期间瑞典一些铁路区段轨道电路出现的异常,以及1989年和2000—2005年强磁暴期间俄国北部一些铁路区段出现的异常进行了描述,并对该磁暴期间产生这些异常的影响因素进行了分析;最后提出为进一步了解磁暴影响轨道电路机理还需要做的工作。

Influence of Geomagnetic Storms on Track Circuits

Geomagnetic storms is the result of magnetospheric-ionospheric currentg interaction with earth g magnetic field during solar activity. When geomagnetic storms come, the varying magnetic field will in- duce electric field on the ground and generate geoelectric currents in some technical systems, such as railway equipment, power transmission grids, and oil and gas pipelines. The geomagnetical induced cur- rents （GIC） will cause problems in these systems. In this paper, we describe some railway track circuit problems during strong geomagnetic storms on 13 -14 July 1982 in Swedish and the abnormalities occur- ring to the northern railways in Russia during strong geomagnetic storms in 1989 and the period of time from 2000 to 2005. We analyzed the reasons about these abnormalities and put forward the work to be clone in the further in order to further understand the influences of geomagnetic storms on track circuits.