Research of geomagnetically induced currents in Kamchatka powergrid

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   Geomagnetically induced currents (GIC) are serious thread for normal
   functioning of technogenic systems with long conductor elements. Due to
   some electric peculiarities of our region, such as centralized generation
   of electric power by regional center and allocation of geothermal power
   plants far from consumers, the basic element of power transmission system
   is power lines. On the background of the occurred failures in Norway, USA
   and Canada, which were caused by GIC, this phenomenon needs to be
   investigated to estimate its risk and to search the ways to prevent it.
   In practice, investigation of GIC in technogenic systems is associated
   with some difficulties of application of expensive equipment and of the
   necessity to interact closely with electric servicing companies.
   Theoretical modeling requires complicated calculations and full data about
   the structure of system and environment. In 2010 we developed and approved
   the way of application of current harmonics in power grid as a GIC
   indicator.
   Applying this approach we have carried out GIC monitoring on
   Petropavlovsk-Kamchatskiy - Paratunka power line and
   Petropavlovsk-Kamchatskiy - Ust-Bolsheretsk power line. This work has
   shown interrelation between harmonics and geomagnetic activity. It has
   been established, that for Kamchatka power grid sections with different
   topology, GIC genesis has significantly various pattern.