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TitleCalculation analysis of geomagnetically induced currents with different network topologies
AuthorZheng, K; Liu, L -G; Boteler, D; Pirjola, R
SourceProceedings IEEE Power & Energy Society General Meeting; 2013 p. 1-4,
Alt SeriesEarth Sciences Sector, Contribution Series 20140027
MeetingIEEE Power & Energy Society General Meeting; Vancouver; CA; July 21-15, 2013
Mediapaper; on-line; digital
File formatpdf
Subjectsgeophysics; geomagnetic fields; geomagnetism; geomagnetic variations; currents
Illustrationsmodels; graphs; tables
ProgramNorthern Canada Geohazards Project, Public Safety Geoscience
AbstractThe topology of the power system significantly affects the amplitudes of geomagnetically induced currents (GIC) and their flow in the network. In this paper, we collect the typical resistance values for the 220kV, 500kV, 750kV and 1000kV systems in China. Using these data we calculate the line GIC and substation GIC with different network topology models, also depict the characteristics of the GIC in these models. GIC grows with increasing line length but approaches an asymptotic constant value. However it is shown that a more relevant parameter than the individual line length is the length of the whole system. The results of these studies provide a guide to estimating GIC impacts precisely on future power systems.
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, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. This paper examines how the network topology affects the flow of geomagnetically induced currents (GIC) in a power network. The results of these studies provide a guide to estimating GIC impacts precisely on future power systems.