Latest event on East Anglia ONE

Bokalift has installed 2 jackets and 5 sets of pin piles (15 total). Read more

Latest Update: 14 June 2018

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Project Details for East Anglia ONE
General Information Name East Anglia ONE correct
Other names East Anglia Array, Zone 5, Norfolk, EA ONE correct
Country name United Kingdom correct
Region England, East of England correct
Comments The EA zone has favourable conditions including relatively low water depths, convenient location near demand centres and good wind conditions .

The project supply chain plans references plans to use a small area (three to five turbine locations) of the EA1 Project as a demonstration site for turbines and foundations.
Round (or category) Round 3 correct
Development status Under Construction correct
Power & Turbines Project capacity 714 MW correct
Turbine model SWT-7.0-154 (Siemens Gamesa) correct
Turbine capacity 7 MW correct
Number of turbines 102 correct
Total turbine height 197 m correct
Hub height 120.00 m correct
Rotor diameter 154 m correct
Foundation Grounded: Jacket (Piled) (Three legged jacket foundations. Jacket weight: 850 tons. Height: 62.6 m. Footprint: 27 x 27 m. Weight piles: 360 tons.) correct
Windspeed 10 year mean wind speed (2000-2009) Available online now
Costs Stated project cost GBP(mill) 2600.00 correct
Location & Environment Sea name North Sea, Southern North Sea (Thames) correct
Centre latitude 52.226° correct
Centre longitude 2.494° correct
Area 205 km2 correct
Depth range (Chart Datum) 30 m - 41 m correct
Depth range stated by developer 30 m - 42 m correct
Distance from shore (reported) 45.4 km correct
Distance from shore (computed from centre) 55.1 km correct
Ports Installation base Great Yarmouth (Wind turbine pre-assembly and marshalling), BOW Terminal Vlissingen for foundations correct
Ops and maintenance Lowestoft (includes construction management) correct
Grid Converter/Collector platforms None correct
Offshore transformers EA1A correct
Grid connection point Bramford 400kV, NW of Ipswich correct
Cable landing point Between the Bawdsey Martello Tower and Bawdsey Manor 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 2 correct
Average length per cable 85 km correct
Transmission type (e.g. HVAC) correct
Nominal voltage 220 kV correct
Maximum voltage correct
Power rating correct
Number of cores 3 correct
Conductor type correct
Section area correct
Insulation correct
Number fibre optics 2 correct
Export minimum bend radius (MBR) correct
Burial depth correct
Comments Two 220kV HVAC offshore export cables. The cables will be buried 50m apart, with a 250m outer protection on either side (550m corridor in total). Therefore there will be two trenches. There will also be two cables joining the offshore substations. correct
Onshore Cables Number of onshore cables 6 correct
Average length per cable 37 km correct
Comments Up to six 220kV HVAC underground cables. The six cables will be laid in two circuits of three cables, in two separate trenches. Siemens will be providing 66kV array cables as part of their new option to provide their direct drive turbines, 66kV array cables, transformers and switchgear. correct
Array Cables Array cable length 122 km correct
Estimated cable length LogIn
Transmission type (e.g. MVAC) correct
Nominal voltage 66 kV correct
Maximum voltage correct
Burial depth correct
Number of cores correct
Conductor type correct
Section correct
Insulation correct
Power rating 66 MVA correct
Number of fibre optics correct
Minimum bend radius (MBR) correct
Comments 102 array cables correct
Benefits Homes powered annually 505694 correct
CO2 reduced per year 1022008 tonnes correct
SO2 reduced per year 23768 tonnes correct
Expected life 30.0 years correct
Other Website Visit correct

Call +44 (0)1502 307 037 for more information

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