Latest event on Westermost Rough

Green Investment Group (GIG) (formerly known as the Green Investment Bank) acquired a further 25% stake (50% total) of the project from Marubeni Corporation. Ørsted also owns a 50% interest in the project. Read more

Latest Update: 27 March 2018

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Developer correct
After the Marubeni Corporation and the UK Green Investment Bank purchased stakes in the company they agreed that DONG would provide operations and maintenance at the site.
Operator-Offshore Transmission correct
Owner correct
Owner correct
Owner-Offshore Transmission
TC Westermost Rough OFTO Limited
TC Westermost Rough OFTO Limited is the licensee entity incorporated by the consortium comprised of Transmission Capital Partners, who Ofgem appointed as the preferred bidder to own and operate the offshore transmission link of the wind farm for the next 20 years, and International Public Partnerships Limited. The transmission assets hold an asset value of £157 million and include the onshore substation, export cables and offshore substation.
Annual Revenue through Tender Revenue Stream (TRS) is £11.3m.

Percentage: LogIn
Value: LogIn
Project Details for Westermost Rough
General Information Name Westermost Rough correct
Other names correct
Country name United Kingdom correct
Region England, Yorkshire & the Humber correct
Comments Stated cost includes cost of transmission assets.

The transmission tender round will be under the generator-build model and not the OFTO-build model. This means that the owner will build the transmission and another organisation will buy the transmission at a later date.

Rob Sampson (Head of Operations Grimsby) has mentioned that “We will have a helicopter under contract, which is provided primarily for unplanned maintenance when you can’t get a vessel out in the field because you have been weathered off.This will be the first Dong site to use a helicopter, so it is a pioneering area for us.”
Round (or category) Round 2 correct
Development status Fully Commissioned correct
Power & Turbines Project capacity 210 MW correct
Turbine model SWT-6.0-154 (Siemens) correct
Turbine capacity 6 MW correct
Number of turbines 35 correct
Total turbine height 177 m correct
Hub height 102.00 m correct
Rotor diameter 154 m correct
Foundation Grounded: Monopile correct
Windspeed 10 year mean wind speed (2000-2009) Available online now
Costs Stated project cost EUR(mill) 870.00 correct
Location & Environment Sea name North Sea, Southern North Sea (Humber) correct
Centre latitude 53.806° correct
Centre longitude 0.150° correct
Area 35 km2 correct
Depth range (Chart Datum) 12 m - 22 m correct
Depth range stated by developer 10 m - 25 m correct
Distance from shore (reported) 8 km correct
Distance from shore (computed from centre) 11.2 km correct
Ports Installation base Saint Nazaire (Substation), Esbjerg (Turbines), Aalborg(Foundations) correct
Ops and maintenance Grimsby (In the future DONG O&M hub) correct
Grid Converter/Collector platforms None correct
Offshore transformers Westermost Rough Substation correct
Grid connection point Salt End correct
Cable landing point N. of Tunstall correct
Export Cables
Please note that export cables connect the offshore transformer (substation) to either; shore or an offshore HVAC-HVDC converter station for onward transmission via HVDC cabling. Please see the converters page for planned converter stations and transmission cables.

The export cable length does not generally include the onshore component. The exception is when the onshore substation is close to shore.
Number of export cables 1 correct
Average length per cable 11 km correct
Transmission type (e.g. HVAC) correct
Nominal voltage 132 kV correct
Maximum voltage correct
Power rating correct
Number of cores correct
Conductor type correct
Section area correct
Insulation correct
Number fibre optics correct
Export minimum bend radius (MBR) correct
Burial depth correct
Comments correct
Onshore Cables Number of onshore cables 3 correct
Average length per cable 15 km correct
Comments 132kV correct
Array Cables Array cable length 53 km correct
Estimated cable length LogIn
Transmission type (e.g. MVAC) correct
Nominal voltage 33 kV correct
Maximum voltage correct
Burial depth correct
Number of cores correct
Conductor type correct
Section correct
Insulation correct
Power rating correct
Number of fibre optics correct
Minimum bend radius (MBR) correct
Comments 35 array cables. correct
Benefits Homes powered annually 148734 correct
CO2 reduced per year 300591 tonnes correct
SO2 reduced per year 6990 tonnes correct
Expected life 25.0 years correct
Other Website Visit correct

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