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TitleThe influence of the coast effect on geomagnetically induced currents: A modeling study
 
AuthorWang, X; Liu, C -M; Boteler, DORCID logo; Pirjola, RORCID logo
Source 2021 p. 1-5, https://doi.org/10.1109/PESGM46819.2021.9637975
Image
Year2021
Alt SeriesNatural Resources Canada, Contribution Series 20210693
PublisherIEEE
Meeting2021 IEEE Power & Energy Society General Meeting (PESGM); Washington; US; July 26-29, 2021
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
SubjectsScience and Technology; electromagnetic fields; geomagnetism; conductivity; finite element method
Illustrationsplots
ProgramPublic Safety Geoscience Assessing space weather hazards
Released2021 12 20
AbstractAssessing the risk to power systems from geomagnetically induced currents (GIC) requires calculations of the geoelectric fields at the Earth's surface. These geoelectric fields are influenced by the boundary between different Earth conductivity structures such as the coastline. This paper uses the finite element method (FEM) to model a three-region conductivity structure to examine the influence of the coast effect on geoelectric fields. A simple power system model consisting of two substations linked by a single power line is used to illustrate how the geoelectric field changes influence GIC in a power grid. The results show that different ocean structures have a significant impact on the GIC especially at lower frequencies. This demonstrates that geoelectric field shifts near coastlines should be taken into account when assessing GIC risk for power grids located within the coastal influence range.
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 uses a finite element method (FEM) model to examine the influence of the coast effect on the geoelectric fields produced during geomagnetic disturbances. A simple power system model consisting of two substations linked by a single power line is used to illustrate how the geoelectric field changes influence the geomagnetically induced current (GIC) in a power grid. This helps to understand how geomagnetic disturbances can interfere with the operation of power systems.
GEOSCAN ID329692

 
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