Sheringham Shoal Offshore Wind Farm

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Sheringham Shoal Offshore Wind Farm
Sheringham Shoal Wind Farm 2012.jpg
Sheringham Shoal Offshore Wind Farm is located in England
Sheringham Shoal Offshore Wind Farm
Location of Sheringham Shoal Offshore Wind Farm
Country England, United Kingdom
Location Sheringham, North Norfolk, East of England
Coordinates 53°7′N 1°8′E / 53.117°N 1.133°E / 53.117; 1.133Coordinates: 53°7′N 1°8′E / 53.117°N 1.133°E / 53.117; 1.133
Status Operational
Commission date September 2012
Owner(s) Statoil 50%
Statkraft 50%
Wind farm
Type Offshore
Site area 14 sq mi (36 km2)
Max. water depth 12–24 m
Distance from shore 9 nmi (17 km)
Power generation
Units operational 88 x 3.6 MW
Make and model Siemens Wind Power
Nameplate capacity 317 MW
Annual generation 1.1 TWh
Website
http://www.scira.co.uk/

Sheringham Shoal Offshore Wind Farm is an offshore wind farm in the United Kingdom by Scira, owned by Statoil and Statkraft with 50% each. Scira has leased the area from The Crown Estate for 40 years.[1][2][3] The first turbine was connected to the grid in August 2011.[4] The nearest turbine is a minimum distance of approximately 9 nautical miles (17 kilometres) to the shore. The turbines are supported by foundations secured to the sea bed. The wind farm will have a total area of approximately 14 sq mi (36 km2).[1][2][5]

The wind farm consists of 88 Siemens 3.6 MW wind turbines (model SWT-3.6-107 costing €450m ($597m)),[6][7] giving a total combined nameplate capacity of 317 MW.[3] The estimated actual output is about 40% of the nameplate capacity, i.e., approximately 125 MW (1.1 TW·h per year),[3][8] which is sufficient to power approximately 220,000 average UK homes, more than twice the equivalent electricity required to supply the whole of the North Norfolk coast. The wind farm will avoid about 500,000 tonnes per year of carbon dioxide emissions compared to electricity generation from fossil fuels.[3]

Project overview[edit]

The United Kingdom has the largest shallow-water offshore wind resource in the world, and it has been estimated that the UK could provide over 33% of the total European potential for offshore wind energy.[citation needed] This is enough to power the country nearly three times over. [1] Britain’s relatively shallow waters and strong winds extend far into the North Sea. The development of the Sheringham Shoal Offshore Wind Farm is another step towards tapping this vast natural resource.

The estimated cost of the project is 10 billion Norwegian kroner (£1.1 bn, US$1.8 bn).[1][2]

Schedule[edit]

Onshore the construction phase includes planning permissions from Broadland and North Norfolk District Councils and grid agreements with EdFE and NGT. Offshore these include the Agreement for Lease with The Crown Estate, Section 36 Consent from BERR and the Marine and Fisheries Agency license. Onshore work began in 2009 while offshore installation was scheduled to start in early 2010 with the installation of 90 foundations – 88 for the turbines and two for the offshore substations.[3] Turbine installation was scheduled to be during the 1st quarter of 2011 and the project was officially opened on September 27, 2012 by Norway's Crown Prince Haakon and Secretary of State Edward Davey.[9]

Cables[edit]

In April 2008, cable company Nexans was awarded the €24m export cable supply contract by Statoil. The contract scope includes engineering, procurement and construction of two 22 km, 145 kilovolt (kV) XLPE submarine export cables, and a spare cable with associated equipment. An optical fibre cable will also be included. Further, Nexans also got a €12m ($15.8m) contract in April 2009 to supply 81 km of infield cables and equipment.[1][2][10]

Installation[edit]

The foundations are pile driven 23–37 m into sandy seabed.[1][2][11] They are 40–60 m tall with a diameter of about 5 m weighing 375–531 tons[12] – big enough that a British double-decker bus could drive inside the tube.[13] The two substation foundations and about 17[14] turbine foundations were installed from June 2010[2] by MTHøjgaard using a special method: The tube was towed to the site on a barge, and the sea crane Svanen (contracted by MTHøjgaard and built to construct the Great Belt fixed link) raised one end of the tube, while the other end on the barge was fixed to a 135 ton giant roller skate with hydraulic motors compensating for wave oscillations which previously hampered operations.[13][15] However, due to insufficient logistics (the first foundation transport vessel arrived almost three months late, the second vessel almost 5 months and the unloading could only take place at limited waveheigts due to the installability of the transport vessels) the Svanen was not able to install the foundations in time which delayed the foundation works at an estimated cost of 600 million NOK and during the execution of the work the contract with MTHøjgaard was terminated by Statoil ASA and Statkraft AS. Seaway Heavy Lifting took over the contract and from April to August 2011 installed the remaining 66 monopile foundations, 71 transition pieces (25 m high, 5 m wide, weight 220 tons)[1] and the two 800–1000 tons offshore substations using their newbuild heavy lift vessel "Oleg Strashnov" for the job.[16] The new installation contracts allowed completion of the Sheringham Shoal project for full operation in late 2012.[17]

See also[edit]

References and notes[edit]

  1. ^ a b c d e f Sheringham Shoal Offshore Wind Farm, United Kingdom Power Technology. Retrieved: 10 November 2010
  2. ^ a b c d e f Sheringham Shoal (United Kingdom) offshore wind farm 4C. Retrieved: 10 November 2010
  3. ^ a b c d e "Sheringham Shoal Offshore Wind Farm" (PDF). Statoil. Retrieved 2009-07-19. 
  4. ^ "First Sheringham Shoal wind turbine powers up ... just 87 to go". BusinessGreen. Incisive Media Investments Limited. 4 August 2011. Retrieved 4 August 2011. 
  5. ^ Sheringham Shoal Offshore Wind Farm Website
  6. ^ "SWT-3.6-107 Wind Turbine". Siemens. Retrieved 2009-07-19. 
  7. ^ "Siemens with 450 Million EUR Contract for 88 Wind Turbines". Renewable Energy Sources. 2009-04-01. Retrieved 2009-07-19. 
  8. ^ By comparison, Sizewell B generated 8.7 TW·h in the year of 2005; while the world's largest hydroelectric plant and largest generating plant of any kind, the mighty Three Gorges Dam, generated 80.8 TW·h in 2008. Thus it would take about eight wind farms the size of Sheringham Shoal to match the annual output of one large nuclear power plant.
  9. ^ Opening of Sheringham Shoal windfarm
  10. ^ 24 million Euro submarine power cable contract for the Sheringham Shoal Offshore Wind Farm - Nexans
  11. ^ LORC Knowledge - Datasheet for Sheringham Shoal Offshore Wind Farm LORC. Accessed: 22 October 2011
  12. ^ Seaway Heavy Lifting to Install Subsea Foundations for Offshore Wind Farm on Sheringham Shoal (UK) Subsea World News, 11 March 2011. Accessed: 22 October 2011
  13. ^ a b Krøyer, Kent. Giant roller skate raises wind turbine foundations Images (in Danish) Ing.dk, 9 November 2010. Retrieved: 10 November 2010
  14. ^ Sheringham Shoal Offshore Wind Farm MT Højgaard. Accessed: 22 October 2011
  15. ^ A 135 ton “shock absorber” on rails MT Højgaard, 3 November 2010. Accessed: 22 October 2011
  16. ^ Foundation installation complete at Sheringham Shoal Wells Harbour, 24 August 2011. Accessed: 22 October 2011
  17. ^ http://www.scira.co.uk/news/news11_03_11.html

External links[edit]