The Bornholm Cable is a submarine power cable under the Baltic Sea, connecting the power grid of the Danish island of Bornholm to the Swedish power grid owned by E.on with a capacity of 60 MW.[1] It is owned by Energinet,[2] previously by Östkraft.[3]
| Bornholm Cable | |
|---|---|
 Location of Bornholm Cable | |
| Location | |
| Country | Sweden, Denmark |
| Coordinates | 55°17′49.9″N 14°26′7.1″E / 55.297194°N 14.435306°E |
| Ownership information | |
| Owner | Energinet |
| Technical information | |
| Power rating | 60 MW |
| AC voltage | 60 kV |
There is an agreement between Svenska kraftnät and Energinet about balancing the Bornholm grid.[2]
Cable sections
editThe cable sections are:[4]
- Hasle substation to Bornholm coast: 1.4 km underground, 400 mm2 conductors at 60 kV
- Undersea section: 43.5 km, 240 mm2 conductors at 60 kV
- Swedish coast to cable terminal: 700 m underground, 400 mm2 conductors at 60 kV
- Cable terminal to Borrby substation: 4.2 km overhead line with 127 mm2 conductors at 60 kV
- Borrby substation to Tomelilla substation: 132 kV line with two circuits
Outages
editThe undersea section has been repeatedly damaged: in 2004,[5] in 2010[6] and in 2013.[7][8][9] The damage in 2013 cost half a million Danish crowns per day, due to electricity price differences between Bornholm and southern Sweden and the costs of two ships waiting for calm weather to repair the cable.[7]
Reserve generating capacity for when the cable is out of service is provided by coal power plants on Bornholm and by diesel generators to cover the start-up time of the coal plants.[6] There is also a project using energy stored in electric vehicles as a backup supply for a period of hours.[10]
In 2018 the cable was buried deeper in the seabed to prevent damage,[11] but suffered failure due to a dragging ship anchor in early 2022.[12]
See also
edit
References
edit- ^ "Den felande länken - en manual i elektriska dröjsmål". Nordvästra Skånes Tidningar: 17. 2019-12-01. Retrieved 2020-01-11.
- ^ a b SOU 2007:99 Förhandsprövning av nättariffer m.m. Ministry of Enterprise and Innovation (Sweden). 2007. Retrieved 2 June 2020.
- ^ SOU 2001:73 Elnätsföretag - särskild förvaltning och regionnätstariffer. Ministry of Enterprise and Innovation (Sweden). 2001. Retrieved 2 June 2020.
- ^ Østergaard, Jacob; Nielsen, John Eli (May 2010). "The Bornholm Power System - An overview" (PDF). S2CID 1621246. Archived from the original (PDF) on 2019-02-23.
- ^ "Kungörelse". Dagens Nyheter: 14. 2005-06-29.
- ^ a b Godske Følg, Bjørn (12 January 2010). "Efter kabelbrud - Bornholm: Vi er verdensmestre i ø-drift". ing.dk. Retrieved 21 April 2020.
- ^ a b "Bornholmskabeln lagad efter 49 dagar - Skuldfrågan ännu inte löst". Ystads Allehanda: 16. 2013-02-13.
- ^ "Kabeln inte lagad än - Bornholm". Ystads Allehanda: 16. 2013-02-07.
- ^ "Höga vågor försenar lagning av kabel - Skadad elledning till Bornholm". Ystads Allehanda: 18. 2013-01-15.
- ^ Høm Jensen, Rikke (7 May 2019). "Afbrudt elkabel til Bornholm giver unik testmulighed". DTU. Retrieved 21 April 2020.
- ^ "Søkablet til Bornholm spules ned i havbunden". Energy Supply. Sep 4, 2018.
- ^ "Mulig kæmpeerstatning paa vej for ødelagt soekabel". TV 2/Bornholm. 3 March 2022.