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Titreresponses of power systems to the natural geomagnetic variations at different latitudes
AuteurTrichtchenko, L; Holt, D; Pirjola, R
SourceProceedings of the electromagnetic compatibility and electromagnetic ecology symposium; 2011 p. 1-4
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110173
ÉditeurDiscone Centre
RéunionElectromagnetic Compatibility and Electromagnetic Ecology Symposium; St. Petersburg; RU; Septembre 13-16, 2011
Sujetstélédétection; géomagnétisme; variations géomagnétiques; champs géomagnétiques; énergie hydroélectrique; énergie électrique; courants; géophysique
ProgrammeTargeted Hazard Assessments in Northern Canada, Géoscience pour la sécurité publique
Résumé(disponible en anglais seulement)
Impacts 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.