ABSTRACT
Geomagnetically Induced Currents (GIC) which are studied in this paper are so-called echo of solar storm on Earth. The varying Earth’s magnetic field associated with geoelectric field induces currents due to Faraday’s law. In accordance to Ohm’s law, currents lead to transmit over the system of conductors with the lowest resistivity. Power grid can be considered as the sample of such a system. The source of GIC in power grid is the grounding points of power system equipment. By entering the power grid, GIC are distributed over the transmission lines, which might cause equipment outage. A power grid performs like an antenna in the presence of GIC by amplifying the negative impact. The majority of power system equipment is no barriers for GIC distribution.
