Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
EHV: Geomagnetic Induced Currents (GIC) and A2 tutorial: Effects of DC Bias on Power Transformers
Time:
Wednesday, 01/Oct/2025:
4:00pm - 6:00pm
Location:Room 522A
Session Topics:
EHV & UHV AC AND DC, EHV&UHV AC and DC
Session Abstract
There has been growing concern in the electric power industry regarding the impact of Geomagnetically Induced Currents (GIC), or DC-quasi currents, which have caused, and may continue to cause, overheating of large numbers of power transformers in certain regions of the world, potentially leading to large-scale, long-duration system blackouts.
This session presents the results of CIGRE WG A2.57 "Effects of DC Bias on Power Transformers" as well as the outcomes of recent research.
Presentations
4:00pm - 4:15pm
Geomagnetically induced currents in Alberta during space weather events of 2024: A comparison to extreme storm statistics
Darcy Raymond Cordell1, Ian Mann1, Hannah Parry1, Ryan MacMullin2
1University of Alberta, Canada; 2AltaLink L.P.
4:15pm - 4:30pm
Identification of At-Risk Substations in the German Transmission Grid from Space Weather
Aline Guimarães Carvalho1, Leonie Pick1, Alexander Grayver2, Stefan Tenbohlen3
1German Aerospace Center (DLR), Germany; 2University of Cologne, Germany; 3University of Stuttgart, Germany
4:30pm - 4:45pm
A2 tutorial: Effects of DC Bias on Power Transformers
Stefan Tenbohlen1, Patrick Picher2, Afshin Rezaei Zare3
1University of Stuttgart, Germany; 2Hydro Quebec, Canada; 3York University, Canada
