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TitleReview of earth conductivity structure modelling for calculating geo-electric fields
AuthorDong, B; Wang, Z; Boteler, D; Pirjola, R
SourceProceedings of the IEEE Power & Energy Society General Meeting; 2013 p. 1-5,
Alt SeriesEarth Sciences Sector, Contribution Series 20140028
MeetingIEEE Power & Energy Society General Meeting; Vancouver; CA; July 21-25, 2013
Mediapaper; on-line; digital
File formatpdf
Subjectsgeophysics; geomagnetic fields; geomagnetism; geomagnetic variations; currents
Illustrationsplots; models
ProgramNorthern Canada Geohazards Project, Public Safety Geoscience
AbstractDuring geomagnetic disturbances the electric field induced by geomagnetic variations drive geomagnetically induced currents (GIC) in conducting networks such as power systems and pipelines. The earth conductivity structure plays an important role in determining the size of the electric field that will be experienced by these systems. The earth conductivity is dependent on rock type and also varies with depth within the Earth. Methods and techniques for modelling different types of earth conductivity structures are reviewed and the advantages and limitations of different models and methods are discussed in this paper. Some methods are advantageous on computation speed while others on the accuracy. Appropriate modelling technique of conductivity structure is important for assessing geomagnetic hazard to 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, satellites, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. This paper describes the modelling of the geo-electric fields that can be a hazard to power systems.