In May 2016 Statoil was granted a seabed lease to develop a floating windfarm, a pilot park 30Km off the coast from Peterhead. Following the axing of competition funding for the Shell/Scottish & Southern Energy Carbon Capture & Storage project at Peterhead’s gas-fired Power Station, on top of the hair-brained threat of litigation from Donald Trump over EOWDC turbines in Aberdeen Bay, and wave energy developer Aquamarine Power going into liquidation, this is some welcome positive news for the renewables industry. Hywind Scotland will be the world’s largest floating offshore windfarm.
In another renewables venture, SSE and partners have been given the green light for the £2.6billion Beatrice offshore wind farm in the Outer Moray Firth whereby £10 million will be invested at Wick Harbour.
An artist’s impression of the Hywind floating wind farm courtesy Scottish Government
Hywind will be installed in the North Sea 30Km off the port of Peterhead near Buchan Deep. It will cover an area of 4km². Wind speeds there reach 20 knots, more consistent and stronger than speeds closer to shore. The location and design mean that the turbines will not visually impact the seascape. Cost effective, there will be less likelihood of disruption to aircraft, communications, wildlife, fishing, shipping and other marine activities. The turbines will stand at an overall height of 258M: the water depth near Buchan Deep is 100M. For fixed turbines, the ideal depth is 20- 60M; two-thirds of the North Sea has depths between 60-250M. Average wave height at the location is 1.8M.
A development by diversifying Norwegian energy firm Statoil with the capacity to power 20,000 homes, five 6MW SWT-6.0-154 direct drive offshore turbines will be moored to a sole floating cylindrical spar buoy by way of catenary cables. To provide extra tension, the ballasted catenary adds 60 tons of weight hanging from each anchor cable’s midpoint. The turbines will be anchored to the seabed via a three point mooring spread, then connected to the mainland through an export cable corridor. The contract for fifteen suction anchors has been awarded to Evanton wave and tidal energy device manufacturer, Isleburn, part of Global Energy Group. Global are also building four devices for the MeyGen project in the Pentland Firth. https://chrisramsey2013.wordpress.com/2015/09/15/tidal-energy-the-flagship-meygen-project
Siemens (HQ, Finland) will supply the turbines for Hywind Scotland. Technicians have developed new controller settings for rotor pitch and yaw drive regulation. With their lightweight nacelles (streamlined casings) and slender cylinders, Siemens turbines are particularly suited for floating foundations. Electricity generation from the windfarm is expected to start in late 2017. The grid connection will be performed by SSE plc.
Statoil is to pilot Batwind, a novel battery storage solution alongside the Hywind floating windfarm. The company announced on March 21st 2016 that the project will see a 1MWh Lithium battery-based system deployed in late 2018, boasting capacity equal to more than two million iPhone batteries.
https://www.youtube.com/watch?v=PpMOP5ogWWA YouTube – Statoil videos
https://www.youtube.com/watch?v=M6w5OiRMS0o Hywind installation challenge
https://www.youtube.com/watch?v=06D4LvU-CG8 YouTube – World’s first demonstration floating wind turbine was towed out into the North Sea in 2009. The 2.3Megawatt Hywind was built by Siemens. This first full-scale floater is now onstream.
Masdar investment in Statoil’s Hywind project: news from January 2017