Geomagnetically induced currents in Norway: the northernmost high-voltage power grid in the world
We have derived comprehensive statistics of geomagnetic activity for assessing the occurrence of geomagnetically induced currents (GIC) in the Norwegian high-voltage power grid. The statistical study is based on geomagnetic recordings in 1994–2011 from which the geoelectric field can be modelled and...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2014-01-01
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| Series: | Journal of Space Weather and Space Climate |
| Subjects: | |
| Online Access: | https://www.swsc-journal.org/articles/swsc/full_html/2014/01/swsc130041/swsc130041.html |
| _version_ | 1819276055382327296 |
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| author | Myllys Minna Viljanen Ari Rui Øyvind August Ohnstad Trond Magne |
| author_facet | Myllys Minna Viljanen Ari Rui Øyvind August Ohnstad Trond Magne |
| author_sort | Myllys Minna |
| collection | DOAJ |
| description | We have derived comprehensive statistics of geomagnetic activity for assessing the occurrence of geomagnetically induced currents (GIC) in the Norwegian high-voltage power grid. The statistical study is based on geomagnetic recordings in 1994–2011 from which the geoelectric field can be modelled and applied to a DC description of the power grid to estimate GIC. The largest GIC up to a few 100 A in the Norwegian grid occur most likely in its southern parts. This follows primarily from the structure of the grid favouring large GIC in the south. The magnetic field has its most rapid variations on the average in the north, but during extreme geomagnetic storms they reach comparable values in the south too. The ground conductivity has also smaller values in the south, which further increases the electric field there. Additionally to results in 1994–2011, we performed a preliminary estimation of a once per 100 year event for geoelectric field by extrapolating the statistics. We found that the largest geoelectric field value would be twice the maximum in 1994–2011. Such value was actually reached on 13–14 July 1982. |
| first_indexed | 2024-12-23T23:34:08Z |
| format | Article |
| id | doaj.art-31efb0a6b8e2428ebee6c11aa0c624ae |
| institution | Directory Open Access Journal |
| issn | 2115-7251 |
| language | English |
| last_indexed | 2024-12-23T23:34:08Z |
| publishDate | 2014-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Journal of Space Weather and Space Climate |
| spelling | doaj.art-31efb0a6b8e2428ebee6c11aa0c624ae2022-12-21T17:25:56ZengEDP SciencesJournal of Space Weather and Space Climate2115-72512014-01-014A1010.1051/swsc/2014007swsc130041Geomagnetically induced currents in Norway: the northernmost high-voltage power grid in the worldMyllys MinnaViljanen AriRui Øyvind AugustOhnstad Trond MagneWe have derived comprehensive statistics of geomagnetic activity for assessing the occurrence of geomagnetically induced currents (GIC) in the Norwegian high-voltage power grid. The statistical study is based on geomagnetic recordings in 1994–2011 from which the geoelectric field can be modelled and applied to a DC description of the power grid to estimate GIC. The largest GIC up to a few 100 A in the Norwegian grid occur most likely in its southern parts. This follows primarily from the structure of the grid favouring large GIC in the south. The magnetic field has its most rapid variations on the average in the north, but during extreme geomagnetic storms they reach comparable values in the south too. The ground conductivity has also smaller values in the south, which further increases the electric field there. Additionally to results in 1994–2011, we performed a preliminary estimation of a once per 100 year event for geoelectric field by extrapolating the statistics. We found that the largest geoelectric field value would be twice the maximum in 1994–2011. Such value was actually reached on 13–14 July 1982.https://www.swsc-journal.org/articles/swsc/full_html/2014/01/swsc130041/swsc130041.htmlGeomagnetically Induced Currents (GIC) |
| spellingShingle | Myllys Minna Viljanen Ari Rui Øyvind August Ohnstad Trond Magne Geomagnetically induced currents in Norway: the northernmost high-voltage power grid in the world Journal of Space Weather and Space Climate Geomagnetically Induced Currents (GIC) |
| title | Geomagnetically induced currents in Norway: the northernmost high-voltage power grid in the world |
| title_full | Geomagnetically induced currents in Norway: the northernmost high-voltage power grid in the world |
| title_fullStr | Geomagnetically induced currents in Norway: the northernmost high-voltage power grid in the world |
| title_full_unstemmed | Geomagnetically induced currents in Norway: the northernmost high-voltage power grid in the world |
| title_short | Geomagnetically induced currents in Norway: the northernmost high-voltage power grid in the world |
| title_sort | geomagnetically induced currents in norway the northernmost high voltage power grid in the world |
| topic | Geomagnetically Induced Currents (GIC) |
| url | https://www.swsc-journal.org/articles/swsc/full_html/2014/01/swsc130041/swsc130041.html |
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