London Array

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London Array offshore wind farm
London Array 02.jpg
The London Array under construction in 2009.
London Array is located in England
London Array
Location of London Array offshore wind farm in England
Country England, United Kingdom
Location 7 miles (11 km) off North Foreland, Kent
Coordinates Lua error in package.lua at line 80: module 'strict' not found.
Status Operational
Construction began March 2011
Commission date April 2013
Construction cost £1.8 billion (€2.2 billion)
Owner(s) Wind farm:


Transmission assets:
Wind farm
Type Offshore
Power generation
Units operational 175
Make and model Siemens Wind Power SWT-3.6-120
Nameplate capacity 630MW
Annual generation 2,500 GWh[1]
Website
www.londonarray.com

The London Array is a 175 turbine 630MW Round 2 offshore wind farm located 20 km off the Kent coast in the outer Thames Estuary in the United Kingdom. It is the largest offshore wind farm in the world, and the largest wind farm in Europe by megawatt capacity.

Construction of phase 1 of the wind farm began in March 2011 and was completed by mid 2013, being formally inaugurated by the Prime Minister of the United Kingdom, David Cameron on 4 July 2013.

The second phase of the project was refused planning consent in 2014 due to concerns on the impact to sea birds.

Description

The wind farm site is more than 20 kilometres (12 mi) off the North Foreland on the Kent coast in the area between Long Sand and Kentish Knock, between Margate in Kent and Clacton in Essex.[2] The site is mostly away from shipping lanes.[3]

The first phase consisted of 175 Siemens Wind Power SWT-3.6 turbines and two offshore substations, giving a wind farm with a peak rated power of 630 MW.[4] Each turbine and offshore substation is erected on a monopile foundation, and connected together by 210 kilometres (130 mi) of 33 kV array cables. The two offshore substations are connected to an onshore substation at Cleve Hill (near Graveney) on the north Kent coast, by four 150 kV subsea export cables, in total 220 kilometres (140 mi).[4] It is named after London because the power goes to the London grid.[5]

The smaller Thanet Wind Farm is to the south of it.

The array is intended to reduce annual CO2 emissions by about 900,000 tons, equal to the emissions of 300,000 passenger cars.[6]

History

In 2001 environmental studies identified areas of the outer Thames Estuary as potential sites for offshore wind farm;[7] the Department of Trade and Industry published the paper Future Offshore -A Strategic Framework for the Offshore Wind Industry, which identified the outer Thames Estuary as one of three potential areas for future wind farm development (Round 2 wind farms).[8] The Crown Estate awarded a 50-year lease to London Array Ltd. (a consortium of E.ON UK Renewables, Shell WindEnergy, and CORE Limited.[note 1]) in December 2003.[7][11] A planning application was submitted in 2005,[11][12] which was approved in December 2006.[13] Planning permission for the onshore electricity substation was received in November 2007.[10]

In May 2008, Shell announced that it was pulling out of the project.[14] It was announced in July 2008 that E.ON UK and DONG Energy would buy Shell's stake.[15] Subsequently on 16 October 2008, London Array announced the Abu Dhabi based Masdar would join E.ON as a joint venture party in the scheme. Under the agreement, Masdar purchased 40% of E.ON's half share of the scheme, giving Masdar a 20% stake in the project overall.[16][17] The resultant ownership was 50% DONG Energy, 30% E.ON UK Renewables and 20% Masdar.[18]

In March 2009, the backers agreed on an initial investment of €2.2 billion.[19] Financing of phase 1 was achieved through the European Investment Bank and the Danish Export Credit Fund with £250 million.[18]

In 2013, in response to "Offshore Transmission Owner" regulations (see Ofgem), the consortium divested the electrical transmission assets of the wind farm (valued at £459 million) to "Blue Transmission London Array Limited" – an entity incorporated by Barclays Infrastructure Funds Management Limited (Barclays) and Diamond UK Transmission Corporation (Mitsubishi Corporation subsidiary).[20]

Satellite image of the Thames Estuary with London Array top right, and neighbouring wind farm areas.

In January 2014 Dong sold half its stake to Quebec public pension plan manager Caisse de dépôt et placement du Québec ("La Caisse").[21]

At the time of its construction it was the largest offshore wind farm in the world.[22]

Construction and commissioning

Offshore work began in March 2011;[23] the first foundation was installed in March 2011[24]

Turbines were supplied by Siemens Wind Power.[25] Their foundations were built by the joint-venture between Per Aarsleff and Bilfinger Berger Ingenieurbau GmbH. The same company supplied and installed the monopiles.[26] Generators were installed by MPI and A2SEA by using an installation vessel TIV MPI Adventure and a jack-up barge Sea Worker.[27] Two offshore substations were designed, fabricated and installed by Future Energy, a joint venture between Fabricom, Iemants and Geosea, while electrical systems and onshore substation work was undertaken by Siemens Transmission & Distribution. The subsea export cable was supplied by Nexans and array cables by JDR Cable Systems. The array cables and the export cables were installed by VSMC.[26]

The wind farm started producing electricity at the end of October 2012.[23] All 175 turbines of phase 1 were confirmed fully operational on 8 April 2013,[28] and the wind farm was formally inaugurated by the Prime minister David Cameron on 4 July 2013.[29]

Phase 2

A second phase was planned which would have seen a further 166 turbines installed to increase the capacity to 1000MW.[30] However, the second phase was scaled back and finally cancelled in February 2014 after concerns were raised by the Royal Society for the Protection of Birds about its effect on a local population of red-throated divers.[30][31]

See also

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Harris, Stephen. Your questions answered: The London Array The Engineer (magazine), 19 November 2013.
  4. ↑ 4.0 4.1 Nathan 2012
  5. ↑ Fehrenbacher, Katie. The massive London Array offshore wind farm is finally done and it’s awesome Gigaom, 8 July 2013.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ 7.0 7.1 The London Array (London Array), p.6
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ 10.0 10.1 Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ 11.0 11.1 Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ ES Non-technical summary (June 2005)
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  18. ↑ 18.0 18.1 Lua error in package.lua at line 80: module 'strict' not found.
  19. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  20. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  21. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  22. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  23. ↑ 23.0 23.1 Lua error in package.lua at line 80: module 'strict' not found.
  24. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  25. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  26. ↑ 26.0 26.1 Lua error in package.lua at line 80: module 'strict' not found.(subscription required)
  27. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  28. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  29. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  30. ↑ 30.0 30.1 Lua error in package.lua at line 80: module 'strict' not found.
  31. ↑ Lua error in package.lua at line 80: module 'strict' not found.

Notes

  1. ↑ After 26 June 2007 Core Limited became known as Dong Energy London Array Limited.[9] Core Ltd. was a joint venture between Dong Energy A/S (Denmark) and Farm Energy Ltd. (UK) see notes in E.ON 7 November 2007 press release.[10]

Sources

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External links


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