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Titleresponses of power systems to the natural geomagnetic variations at different latitudes
AuthorTrichtchenko, L; Holt, D; Pirjola, R
SourceProceedings of the electromagnetic compatibility and electromagnetic ecology symposium; 2011 p. 1-4
Alt SeriesEarth Sciences Sector, Contribution Series 20110173
PublisherDiscone Centre
MeetingElectromagnetic Compatibility and Electromagnetic Ecology Symposium; St. Petersburg; RU; September 13-16, 2011
Subjectsgeophysics; remote sensing; geomagnetism; geomagnetic variations; geomagnetic fields; hydroelectric power; electric power; currents
ProgramTargeted Hazard Assessments in Northern Canada, Public Safety Geoscience
AbstractImpacts of the natural low-frequency electromagnetic fluctuations (geomagnetic storms) on power grids can be significant enough to cause equipment damage or even power blackouts. In order to prevent these damaging impacts, the effective procedures should be placed based on the assessments of the geomagnetically induced currents (GIC) in power grids and their interference with the essential equipment.
The GIC sizes are influenced by the amplitude of the geomagnetic field variations, ground conductivity structure, and topology and characteristics of the affected network. Also, it is anticipated that the northern networks would experience larger GICs due to their location in the auroral zone, where the rate of occurrence of the geomagnetic storms is larger. It will be shown that the network configuration plays its role in the GIC distribution over the power grid and proper network modelling is important component for the assessment of the geomagnetic hazard to power grids.