Impact of Solar Winds
The Sun produces a solar wind — a continuous flow of charged particles — that can affect us on Earth. It can, for example, disrupt communications, navigation systems, and satellites.
Geomagnetic storm that occurred on July 22nd, 2009 was rated as the strongest geomagnetic storm. This storm occurred at the same time as the solar eclipse reached its maximum. The large amplitude oscillations of the magnetic field were recorded and such large amplitudes were not observed before one year. It lasted for 9 hours approximately.
One can minimize the effects of Geomagnetic storm by replacing the transformers
of the power stations with the GIC (Geomagnetically Induced Current) immune models, such as those with three–phase, three–leg core designs, and redesign their systems to tolerate large voltage swings.
Other preventive measures include hardening buildings and systems, providing backup communication alternatives for system operators, separating interconnected systems into several non–synchronous islands, balancing loads between transmission lines and improving and exercising recovery capabilities.