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TitleEquivalent circuits for modelling geomagnetically induced currents from a neighbouring network
AuthorBoteler, D H; Lackey, A J C; Marti, L; Shelemy, S
SourceProceedings IEEE Power & Energy Society General Meeting; 2013 p. 1-5,
Alt SeriesEarth Sciences Sector, Contribution Series 20140024
MeetingIEEE Power & Energy Society General Meeting; Vancouver; CA; July 21-25, 2013
Mediapaper; on-line; digital
File formatpdf
Subjectsgeomagnetism; geomagnetic variations; geomagnetic fields
Illustrationslocation maps; tables; histograms
ProgramNorthern Canada Geohazards Project, Public Safety Geoscience
AbstractGeomagnetically induced currents (GIC) can pose a problem for power system operation. To assess the geomagnetic threat requires modelling of the GIC in the power system. However, as well as the characteristics of the system itself, GIC are affected by connections to neighbouring systems. This paper considers three choices of equivalent circuit for a neighbouring system. Model calculations are made for the Ontario system wih equivalent circuits for the neighbouring Manitoba system, and vice versa. Values from these calculations are compared with the exact values determined from model calculations for the combined Ontario and Manitoba systems. The calculations with equivalent circuits produce errors in the GIC at substations that diminish with increasing distance of the substation from the connection to the neighbour. Comparison of the results showed that the best choice for an equivalent circuit comprises the induced voltage and resistance for the first transmission line into the neighbouring system.
Summary(Plain Language Summary, not published)
Space weather refers to the dynamic conditions on the Sun and in the space environment, in particular, in the near-Earth environment, that can affect critical infrastructure. NRCan operates the Canadian Space Weather Forecast Centre and conducts research into space weather effects on power systems, pipelines, satellites, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. This paper describes how to include neighbouring networks when modelling geomagnetic effects on power systems.