| Title | Calculation of GIC in Bulk Power Systems |
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| Author | Horton, R; Boteler, D H |
| Source | Proceedings, CIGRE US Grid of the Future Symposium; 2013 p. 1-6 |
| Image |  |
| Year | 2013 |
| Alt Series | Earth Sciences Sector, Contribution Series 20130461 |
| Publisher | CIGRE US |
| Meeting | CIGRE US Grid of the Future Symposium; Boston; US; October 20-22, 2013 |
| Document | book |
| Lang. | English |
| Media | paper |
| File format | pdf |
| Subjects | geophysics; engineering geology; Health and Safety; pipeline feasibility studies; pipelines; geomagnetism; geomagnetic fields; geomagnetic variations; magnetic disturbances; magnetic field; magnetic
storms |
| Illustrations | diagrams |
| Program | Public Safety Geoscience Northern Canada Geohazards Project |
| Released | 2013 01 01 |
| Abstract | During geomagnetic disturbances, magnetic field variations drive low frequency electric currents along transmission lines and through transformer windings to ground wherever there is a path for them to
flow. GIC are considered quasi-dc because of their low frequency (typically on the order of mHz) relative to the power frequency; thus, from a power system modeling perspective can be considered dc. The flow of these quasi-dc currents in
transformer windings causes half-cycle saturation of transformer cores which leads to increased transformer hotspot heating, harmonic generation and reactive power loss, each of which can affect system reliability. Assessment of the geomagnetic
hazard requires accurate modeling of the GIC that are expected to occur during a given geomagnetic disturbance (GMD). This paper serves as a primer for calculating geo-electric fields, developing the appropriate system model and computing GIC in
bulk 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. Assessment of geomagnetic hazard requires accurate modeling of the geomagnetically induced currents (GIC) that are expected to occur during a given geomagnetic disturbance (GMD). This paper serves as a primer
for calculating geo-electric fields, developing the appropriate system model and computing GIC in bulk power systems. |
| GEOSCAN ID | 293665 |
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