Triton Knoll

Triton Knoll Wind Farm is an 857 MW round 2 offshore wind farm nearing completion off the coast of Lincolnshire, in the North Sea, England.
RWE Npower Renewables were awarded the lease to the development area in 2003. The offshore elements of the wind farm of up to 1200MW power gained planning consent in 2013; RWE reduced the scope of the wind farm to 900MW or under in 2014, to reduce cost per MW.
Statkraft became joint owner of the development in early 2015. The onshore and offshore electrical connection assets were given planning permission in September 2016. The Project is now owned by RWE (59%), J-Power (25%) and Kansai Electric Power (16%). Construction of the first turbine was completed in January 2021, and with the installation of substations at each end of an undersea cable, first power was announced on 1 March 2021. The final turbine of the 90 in the development was assembled on 17 September 2021, with an expected final completion in spring 2022.
History.
The project was initially developed by RWE Npower Renewables, who was awarded the 'Triton Knoll' development area by the Crown Estate in 2003. The original development was refined, extending north outside the original area, with the boundaries of the area defined by the avoidance of main shipping routes.
In 2008 the developer accepted an offer from National Grid for an onshore grid connection at Bicker Fen, with landfall made at Mumby. Later the connection offer was withdrawn by National Grid due to a re-assessment of their planning. By 2011 the two parties had agreed on a connection at Bicker Fen. However, due to uncertainty over the final state of the Bicker Fen substation, in 2011 the developer split the planning applications into separate offshore wind farm and electrical system applications, to minimise delay.
A planning application for the offshore elements was submitted in early 2012. The formal developer was "Triton Knoll Offshore Wind Farm Ltd", a 100% subsidiary of RWE Npower Renewables -they applied for a wind farm of in size off the North Norfolk and Lincolnshire coast in the southern North Sea; the development area was cut in two by a NE/SW running pipeline channel of width. The proposed wind farm would be of up to 1200MW capacity, with turbines foundations in water with depth of . The planning application included the offshore structures, but excluded the undersea export cable, and onshore electrical infrastructure.
In July 2013 the government approved the plan for a wind farm of up to 288 turbines with up to 1200MW generating capacity, with associated meteorological masts, offshore substations, and connecting cabling, with wind turbines limited to tip height, rotor height, and rotor diameter. Additionally pile driving was not permitted during the Herring spawning season (September to mid October), without prior permission.
In January 2014 the developer RWE announced that it had chosen to progress with a reduced plan of between 600 and 900 MW power, in order to reduce the cost (per MW) of the development.
In February 2015 Statkraft acquired a 50% stake in the project. In late 2015 Statkraft announced it would no longer be investing in offshore wind, but would continue with the development at Triton Knoll.
In April 2015 the developers submitted their planning application for the electrical power export system. HVAC was identified as the preferred method of electrical power export; HVDC and mixed HVDC/HVAC systems were considered but HVDC was rejected primarily on cost grounds, with the export cable length not sufficiently long to justify a HVDC system. Overhead lines were rejected on environmental impact grounds. A landfall at or near Anderby Creek was identified as likely, An intermediate electric compound (IEC) use to regulate the reactive power of the AC cables, and a preferred site was selected to the west of Skegness Stadium. A final substation site at or near "Double Twelves Drove" northwest of the Bicker Fen connection, and adjacent east of the "South Forty Drain" was shortlisted as the preferred option. Offshore and onshore export cables were to be energised at up to 220kV for a connection at Bicker Fen at 400kV.
The proposed onshore cable route consisted of around of underground cable - a number of interested parties raised concerns about the cable route and windfarm: farmers and the NFU raised concerns about its effects on drainage; and Lincoln City Council claimed the development would have a negative effect on tourism; Lincolnshire County Council raised concerns about the combined environmental impact of the onshore link together with the 1.4 GW Viking Link electrical connector to Denmark.
The electrical grid connection including onshore and offshore cabling was given planning permission in September 2016.
The wind farm was estimated in 2015 to represent a total investment of £3-4 billion. With the scaling back of capacity and falling installation prices, the 90 turbine 857MW installation is expected (September 2021) to cost some £2 billion.