Latest event on Hornsea Project One

DP2 INNOVATION and SEA INSTALLER have left the site. INNOVATION was installing foundations and INSTALLER the transition pieces. Both vessels are to start work on other projects, Borkum Riffgrund 2 and Rentel respectively. SEA CHALLENGER arrived on site on 26th April to continue with transition piece installation.. Read more

Latest Update: 03 May 2018

You can help keep this an open resource by submitting new information. Simply click on the correct pencil icon.
Developers/Owners/Operators Database in Excel | Add your Organisation
Developer correct
Owner correct
Project Details for Hornsea Project One
General Information Name Hornsea Project One correct
Other names Zone 4, Subzone 1, Heron Wind & Njord correct
Country name United Kingdom correct
Region England, Yorkshire & the Humber correct
Comments The transmission assets have been named Vi Aura Transmission Ltd.

Hornsea Project One will contain three HVAC substations. It will also contain a reactive compensation substation half way along the route due to the wind farms moving further offshore.

The export capacity of 1200MW is detemined by the limitations of the offshore substations, while the aggregated installed generator capacity is 1218MW.
Round (or category) Round 3 correct
Development status Under Construction correct
Power & Turbines Project capacity 1,218 MW correct
Turbine model SWT-7.0-154 (Siemens Gamesa) correct
Turbine capacity 7 MW correct
Number of turbines 174 correct
Total turbine height 200 m correct
Hub height correct
Rotor diameter 154 m correct
Foundation Grounded: Monopile (The west section was planned to have 58 suction bucket jacket foundations but this was changed to monopiles. EEW Special Pipe Constructions GmbH (EEW SPC) will manufacture all 174 monopiles. Each monopile foundation has a diameter of up to 8.1m and weighs approximately 900 tons and are 65m long.) correct
Windspeed 10 year mean wind speed (2000-2009) Available online now
Costs Stated project cost EUR(mill) 3360.00 correct
Location & Environment Sea name North Sea, Southern North Sea (Humber) correct
Centre latitude 53.883° correct
Centre longitude 1.922° correct
Area 407 km2 correct
Depth range (Chart Datum) 24 m - 37 m correct
Depth range stated by developer 23 m - 37 m correct
Distance from shore (reported) 120 km correct
Distance from shore (computed from centre) 114.5 km correct
Ports Installation base Vlissingen (foundations), Able Seaton Port correct
Ops and maintenance Grimsby (DONG O&M hub) correct
Grid Converter/Collector platforms 1 correct
Offshore transformers Hornsea One Reactive Compensation Substation, Hornsea Platform 1A Offshore Substation, Hornsea Platform 1B Offshore Substation, Hornsea Platform 1C Offshore Substation correct
Grid connection point Killingholme correct
Cable landing point Horseshoe Point 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 3 correct
Average length per cable 142 km correct
Transmission type (e.g. HVAC) correct
Nominal voltage 220 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 Two 'interlink' of 13km and 14km cables will connect the substation platforms. These have not been included in the total export cables.

Hornsea Project One will have three substations which will connect to a single reactive compensation station mid-way to shore.
Onshore Cables Number of onshore cables 3 correct
Average length per cable 38 km correct
Comments Landfall is at Horseshoe Point, Marshchapel. Three bores must be installed for ducts that will accommodate the offshore cables The cable will run to the onshore substation at North Killingholme and connect to the grid. correct
Array Cables Array cable length 357 km correct
Estimated cable length LogIn
Transmission type (e.g. MVAC) correct
Nominal voltage 34 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 Total manufactured cable for the park is 381km with the remainder being spare. correct
Benefits Homes powered annually 862655 correct
CO2 reduced per year 1743426 tonnes correct
SO2 reduced per year 40545 tonnes correct
Expected life correct
Other Website Visit correct

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

Keep on top of the market. Perform analysis. Make informed decisions.


More information?

Receive monthly updates with our Offshore Windfarm Subscription and gain access to even more detailed information on; cabling, converters, costs, foundations, substations, turbines.

Filter :
Decommissioned Beatrice Demonstration Beatrice Demonstration
Decommissioned Blyth Blyth
Fully Commissioned Barrow Barrow
Fully Commissioned Blyth Offshore Demonstrator Project - Array 2 Blyth Offshore Demonstrator Project - Array 2
Fully Commissioned Burbo Bank Burbo Bank
Fully Commissioned Burbo Bank Extension Burbo Bank Extension
Fully Commissioned Dudgeon Dudgeon
Fully Commissioned Galloper Galloper
Fully Commissioned Greater Gabbard Greater Gabbard
Fully Commissioned Gunfleet Sands Gunfleet Sands
Fully Commissioned Gunfleet Sands 3 - Demonstration Project Gunfleet Sands 3 - Demonstration Project
Fully Commissioned Gwynt y Môr Gwynt y Môr
Fully Commissioned Humber Gateway Humber Gateway
Fully Commissioned Hunterston Test Centre - Mitsubishi 7MW (onshore) Hunterston Test Centre - Mitsubishi 7MW (onshore)
Fully Commissioned Hunterston Test Centre - Siemens 6MW (onshore) Hunterston Test Centre - Siemens 6MW (onshore)
Fully Commissioned Hunterston Test Centre (onshore) Hunterston Test Centre (onshore)
Fully Commissioned Hywind Scotland Pilot Park Hywind Scotland Pilot Park
Fully Commissioned Inner Dowsing Inner Dowsing
Fully Commissioned Kentish Flats Kentish Flats
Fully Commissioned Kentish Flats Extension Kentish Flats Extension
Fully Commissioned Levenmouth demonstration turbine Levenmouth demonstration turbine
Fully Commissioned Lincs Lincs
Fully Commissioned London Array London Array
Fully Commissioned Lynn Lynn
Fully Commissioned North Hoyle North Hoyle
Fully Commissioned Ormonde Ormonde
Fully Commissioned Race Bank Race Bank
Fully Commissioned Rhyl Flats Rhyl Flats
Fully Commissioned Robin Rigg Robin Rigg
Fully Commissioned Scroby Sands Scroby Sands
Fully Commissioned Sheringham Shoal Sheringham Shoal
Fully Commissioned Teesside Teesside
Fully Commissioned Thanet Thanet
Fully Commissioned Walney Phase 1 Walney Phase 1
Fully Commissioned Walney Phase 2 Walney Phase 2
Fully Commissioned Wave Hub Wave Hub
Fully Commissioned West of Duddon Sands West of Duddon Sands
Fully Commissioned Westermost Rough Westermost Rough
Partial Generation/Under Construction Rampion Rampion
Partial Generation/Under Construction Walney Extension Walney Extension
Under Construction Aberdeen Offshore Wind Farm (EOWDC) Aberdeen Offshore Wind Farm (EOWDC)
Under Construction Beatrice Beatrice
Under Construction East Anglia ONE East Anglia ONE
Under Construction Hornsea Project One Hornsea Project One
Pre-Construction Hornsea Project Two Hornsea Project Two
Consent Authorised Blyth Offshore Demonstrator Project - Array 3A & 4 Blyth Offshore Demonstrator Project - Array 3A & 4
Consent Authorised Dogger Bank - Creyke Beck A Dogger Bank - Creyke Beck A
Consent Authorised Dogger Bank - Creyke Beck B Dogger Bank - Creyke Beck B
Consent Authorised Dogger Bank - Teesside A Dogger Bank - Teesside A
Consent Authorised Dounreay Trì Dounreay Trì
Please LogIn to follow projects
Find quick and easy project and company information with our online search tool

Keep on top of the market. Perform analysis. Make informed decisions.

This page is intended to be viewed online and may not be printed without a valid subscription.

Please view this page at