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| Titel |
Evaluating the applicability of the finite element method for modelling of geoelectric fields |
| VerfasserIn |
B. Dong, D. W. Danskin, R. J. Pirjola, D. H. Boteler, Z. Z. Wang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 31, no. 10 ; Nr. 31, no. 10 (2013-10-10), S.1689-1698 |
| Datensatznummer |
250086121
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| Publikation (Nr.) |
 copernicus.org/angeo-31-1689-2013.pdf |
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| Zusammenfassung |
| Geomagnetically induced currents in power systems are due to space weather
events which create geomagnetic disturbances accompanied by electric fields
at the surface of the Earth. The purpose of this paper is to evaluate the
use of the finite element method (FEM) to calculate the magnetic and
electric fields to which long transmission lines of power systems on the
Earth are exposed. The well-known technique of FEM is used for the first
time to simulate magnetic and electric fields applicable to power systems.
Several test cases are modelled and compared with known solutions. It is
shown that FEM is an effective modelling technique that can be applied to
determine the electric fields which affect power systems. FEM enables an
increased capability beyond the traditional methods for modelling electric
and magnetic fields with layered earth conductivity structures, as spatially
more complex structures can be considered using FEM. As an example results
are presented for induction, due to a line current source, in adjacent
regions with different layered conductivity structures. The results show the
electric field away from the interface is the same as calculated for a
single region; however near the interface the electric field is influenced
by both regions. |
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