GIC Effect on 400 kV Grid Transformers of Bangladesh Power System Network

Geomagnetically induced current (GIC) is lower in the low and middle latitude areas than in the auroral and sub-auroral areas. However, this may not be the case during intense solar storms. Long high voltage transmission lines may be severely affected by GIC. Using another grounded winding transformer, it enters the grid and back to the Earth through the grounded winding transformer. Transformers' reactive power consumption may also be significant if severe GMD occurs. The Bangladesh power system network is expanding. Several 400 kV transmission lines are in operation. The 400 kV grid of the Bangladesh power system is taken as a good test case for studying GIC effects in the low latitude region. This paper deals with the simulated response of the 400 kV power grid of BPSN during GMD events.