Hywind Pilot Park, Aberdeenshire, United Kingdom


Hywind Power Park

Touted to become the world's biggest floating wind farm, Hywind Pilot Park will be situated at Buchan Deep in the North Sea, approximately between 25km and 30km off the coast of Peterhead in Aberdeenshire, Scotland. Statoil subsidiary Hywind (Scotland) (HSL) is the owner and developer of the offshore floating wind farm.

The project aims to demonstrate cost-efficient and low-risk solutions for commercial-scale wind parks. It is expected to be completed with an estimated investment of Nkr2bn ($23.03m).

Statoil made the final investment decision (FID) to construct the wind farm in November 2015. The Scottish Government granted approval for the construction of the 30MW project in the same month.

The facility is expected to supply clean power to approximately 20,000 households, when operational by the end of 2017. It is anticipated to offset 42,942t of CO2 and 999t of SO2 emissions a year during its designed operational lifespan of 20 years.

Hywind Pilot Park location and structure

The Hywind Pilot Park wind farm will cover a 4km² area in a water depth between 95m and 120m. The location witnesses an average wind speed of 10m/s.

The wind farm will include five 6MW SWT-6.0-154 direct drive floating wind turbine generator (WTG) units. Each 258m-high turbine will have a hub height between 82m and 101m, as well as a rotor diameter of 154m.

The turbines will be placed between 720m and 1,600m apart and connected by inter-array cables. The electricity generated from the wind farm will be transported to a landfall on the coast at Peterhead to the local grid network through an export cable corridor. The transmission voltage of the inter-array and export cables will be 33kV.

Construction

The onshore construction works on Hywind Pilot Park began in 2016, followed by offshore installation in 2017. Commissioning is expected to be completed in late 2017.

The WTG units are being assembled at a deep water onshore area off the west coast of Norway and transported to the site for installation. Each unit will be tied to the seabed by a three-point mooring and anchoring system.

The cable installation works involve the laying of up to 35km of export cables and 15km of inter-array cables. The export cables will be buried at a depth of 1.5m under seabed using jet trenchers and mechanical trenchers.

Contractors involved

Siemens was awarded the contract to supply the offshore wind turbines for the Hywind Pilot Park project in December 2015.

"The wind farm is expected to supply clean power to approximately 20,000 households, when operational in 2017."

The development of the wind farm infrastructure, including an onshore switchgear yard, will be completed by Statoil, while the grid connection will be performed by SSE.

Isleburn was contracted in November 2015 to provide 15 suction anchors for the project. Deliveries of the same began in 2017.

Lloyd's Register Energy was contracted to provide risk and emergency preparedness analysis for the project in June 2015.

Aibel was awarded an Nkr40m ($3.8m) contract to provide front-end engineering design (FEED) and engineering and management assistance (EMA) for the substructures of the offshore wind farm in July 2014.

The subcontracts for the completion of substructures for the project were awarded to Norwegian Geotechnical Institute (NGI), Dr.techn.Olav Olsen and Principa North.

Origo Solutions was contracted to develop the supervisory control and data acquisition (SCADA) system for the Hywind Pilot Park.

Nexans is responsible to supply cables for the Hywind Pilot Park project.