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地磁暴会在地球表面感应出电动势(Earth Surface Potentials,ESP),ESP、接触网导线和大地三者构成的回路中就会产生地磁感应电流(Geomagnetically Induced Current,GIC)。率先提出了地磁暴影响高铁系统的可能性,并分析GIC侵入CRH2型动车组车载变压器的机理,根据车载变压器的实际容量计算出变压器具体的尺寸参数。用Ansoft软件仿真了不同数值的GIC对车载变压器励磁电流、铁心磁通、谐波及内部磁场造成的变化,结果表明GIC流入CRH2型动车组车载变压器中将导致车载变压器异常工作,影响高铁车辆安全运营。
Geomagnetic storm will generate Geomagnetically Induced Current (GIC) in the loop formed by Earth Surface Potentials (ESP), ESP, catenary wire and earth. It is the first to propose the possibility of geomagnetic storms influencing the high-speed railway system. The mechanism of the intrusion of GIC into the vehicle-mounted transformers of the CRH2 type EMUs is analyzed. The specific size parameters of the transformers are calculated according to the actual capacity of the vehicle-mounted transformers. The simulation results show that GIC flow into CRH2 type vehicle transformer will cause abnormal operation of vehicle transformer and affect the safety of high-speed rail vehicle with Ansoft software simulation of different values of GIC on the field current, core flux, harmonics and internal magnetic field of vehicle transformer. Operate.