0552417 - ASÚ 2022 RIV DE eng J - Journal Article
Švanda, Michal - Smičková, A. - Výbošťoková, T.
Modelling of geomagnetically induced currents in the Czech transmission grid.
Earth, Planets and Space. Roč. 73, č. 1 (2021), č. článku 229. E-ISSN 1880-5981
Institutional support: RVO:67985815
Keywords : geomagnetically induced currents * space weather * transmission networks
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 3.362, year: 2021
Method of publishing: Open access

We investigate the maximum expected magnitudes of the geomagnetically induced currents (GICs) in the Czech transmission power network. We compute a model utilising the Lehtinen-Pirjola method, considering the plane-wave model of the geoelectric field, and using the transmission network parameters kindly provided by the operator. We find that the maximum amplitudes expected in the nodes of the Czech transmission grid during the Halloween storm-like event are about 15 A. For the “extreme-storm” conditions with a 1-V/km geoelectric field, the expected maxima do not exceed 40 A. We speculate that the recently proven statistical correlation between the increased geomagnetic activity and anomaly rate in the power grid may be due to the repeated exposure of the devices to the low-amplitude GICs.
Permanent Link: http://hdl.handle.net/11104/0327548