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Calculation of geomagnetically induced currents in the 400 kV power grid in southern Sweden

Wik, Magnus LU ; Viljanen, A.; Pirjola, R.; Pulkkinen, A.; Wintoft, P. and Lundstedt, Henrik LU (2008) In Space Weather: the International Journal of Research and Applications 6(7).
Abstract
Sweden has experienced many geomagnetically induced current (GIC) events in the past, which is obviously due to the high-latitude location of the country. The largest GIC, almost 300 A, was measured in southern Sweden in the earthing lead of a 400 kV transformer neutral during the magnetic storm on 6 April 2000. On 30 October 2003, the city of Malmo at the southern coast suffered from a power blackout caused by GIC, leaving 50,000 customers without electricity for about 20-50 min. We have developed a model that enables calculation of GIC in the southern Swedish 400 kV power grid. This work constitutes the first modeling effort of GIC in Sweden. The model is divided into two parts. The electric field is first derived using a ground... (More)
Sweden has experienced many geomagnetically induced current (GIC) events in the past, which is obviously due to the high-latitude location of the country. The largest GIC, almost 300 A, was measured in southern Sweden in the earthing lead of a 400 kV transformer neutral during the magnetic storm on 6 April 2000. On 30 October 2003, the city of Malmo at the southern coast suffered from a power blackout caused by GIC, leaving 50,000 customers without electricity for about 20-50 min. We have developed a model that enables calculation of GIC in the southern Swedish 400 kV power grid. This work constitutes the first modeling effort of GIC in Sweden. The model is divided into two parts. The electric field is first derived using a ground conductivity model and geomagnetic recordings from nearby stations. The conductivity model is determined from a least squares fit between measured and calculated GIC. GIC are calculated using a power grid model consisting of the topology of the system and of the transformer, transmission line, and station earthing resistances as well as of the coordinates of the stations. To validate the model, we have compared measured and calculated GIC from one site. In total, 24 events in 1998 to 2000 were used. In general the agreement is satisfactory as the correct GIC order of magnitude is obtained by the model, which is usually enough for engineering applications. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Space Weather: the International Journal of Research and Applications
volume
6
issue
7
publisher
American Geophysical Union
external identifiers
  • wos:000258157800001
  • scopus:70350042572
ISSN
1539-4956
DOI
10.1029/2007SW000343
language
English
LU publication?
yes
id
f4f6db87-4f69-4dea-9535-ca5505688c0c (old id 1252980)
date added to LUP
2008-11-03 11:20:54
date last changed
2017-10-08 03:40:37
@article{f4f6db87-4f69-4dea-9535-ca5505688c0c,
  abstract     = {Sweden has experienced many geomagnetically induced current (GIC) events in the past, which is obviously due to the high-latitude location of the country. The largest GIC, almost 300 A, was measured in southern Sweden in the earthing lead of a 400 kV transformer neutral during the magnetic storm on 6 April 2000. On 30 October 2003, the city of Malmo at the southern coast suffered from a power blackout caused by GIC, leaving 50,000 customers without electricity for about 20-50 min. We have developed a model that enables calculation of GIC in the southern Swedish 400 kV power grid. This work constitutes the first modeling effort of GIC in Sweden. The model is divided into two parts. The electric field is first derived using a ground conductivity model and geomagnetic recordings from nearby stations. The conductivity model is determined from a least squares fit between measured and calculated GIC. GIC are calculated using a power grid model consisting of the topology of the system and of the transformer, transmission line, and station earthing resistances as well as of the coordinates of the stations. To validate the model, we have compared measured and calculated GIC from one site. In total, 24 events in 1998 to 2000 were used. In general the agreement is satisfactory as the correct GIC order of magnitude is obtained by the model, which is usually enough for engineering applications.},
  author       = {Wik, Magnus and Viljanen, A. and Pirjola, R. and Pulkkinen, A. and Wintoft, P. and Lundstedt, Henrik},
  issn         = {1539-4956},
  language     = {eng},
  number       = {7},
  publisher    = {American Geophysical Union},
  series       = {Space Weather: the International Journal of Research and Applications},
  title        = {Calculation of geomagnetically induced currents in the 400 kV power grid in southern Sweden},
  url          = {http://dx.doi.org/10.1029/2007SW000343},
  volume       = {6},
  year         = {2008},
}