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››› substation. Offshore construction will start in 2016. The total investment in Dudgeon is estimated to be £1.5 billion. The windfarm will be constructed with 67 wind turbines, each with a capacity of 6MW, totalling 402MW of generation capacity. The annual energy production is estimated to be 1.7 terawatt hours (TWh). The project is located 32km offshore, north of the town of Cromer in north Norfolk, and 20km northeast of the Sheringham Shoal windfarm.
Drydocks World
completes DolWin Beta convertor platform In June, Drydocks World announced completion of the high voltage direct current (HVDC) converter platform for the DolWin Beta project. The platform, the world’s largest in terms of capacity, was built at Drydocks World Dubai and will be connected to Dong Energy’s 330MW Gode Wind 1 and RWE’s 332MW Innogy Nordsee 1 projects once installed in the North Sea. Drydocks World built the massive platform on behalf of AB and Aibel. The structure weighs 23,000 tonnes
and is around 100m long, 70m wide and 90m high. The platform design was adapted from that used for a semi- submersible offshore rig.
Ming Yang to develop Chinese project In June, China Ming Yang Wind Power announced that its subsidiary, Jiangsu Mingyang Wind Power Technology Ltd, had been approved by Rudong Energy Bureau in Jiangsu Province, China, to exclusively develop and operate a 300MW offshore windfarm off the coast of Rudong.
“This marks an important milestone in
Ming Yang’s offshore strategy in China,” said Chuanwei Zhang, chairman and chief executive officer of Ming Yang, noting that the company is developing an innovative Super Compact Drive (SCD) wind turbine generator.
Foundations completed at Borkum Riffgrund 1 GeoSea has just finalised installation of 77 foundations on Dong Energy’s Borkum Riffgrund 1 offshore windfarm. The installation works, including transport from the fabrication yard to the marshalling harbour, finished ahead of schedule. The 77 units consisted of monopiles weighing between 495 tonnes and 684. OWJ
www.owjonline.com in brief…
• Offshore windfarms have been identified as the most likely form of large-scale renewable energy for Guernsey’s future. A new report into the island’s energy needs says offshore wind is the most viable source of renewable energy within reach in the next decade.
• In July 2014, TenneT Holding BV refinanced its existing €1,125 million and €500 million revolving credit facilities with a single facility of €2 billion. The pricing of the facility, which can be used for general corporate purposes, was reduced, and the maturity date was extended to July 2019 with two one-year extension options.
• At the end of July, The Crown Estate in the UK confirmed that it had agreed to Celtic Array Ltd’s request to end its offshore wind zone agreement for the Round 3 Irish Sea Zone, allowing developers DONG Energy and Centrica to cease development activity and terminate their seabed rights. The Crown Estate’s head of offshore wind Huub den Rooijen said, “Whilst we have no plans to reoffer the zone to the market, to improve the understanding of the complex geology in this region, we intend to make available the wealth of data from Celtic Array’s activity through our Marine Data Exchange in due course.”
• The Green Investment Bank (GIB) is to raise a £1 billion fund to encourage new private investors to invest in offshore windfarms in the UK, which has been warmly welcomed by The Crown Estate. The GIB is seeking a suitable group of strategic, long-term co-investors to participate in this innovative capital-raising exercise.
• Sembmarine SLP Ltd has signed a memorandum of understanding with the China Shipbuilding Corporation, Zhengzhou Institute of Mechanical and Electrical Engineering, with a view to co-operating and promoting products and services for use in
offshore projects, specifically in regard to substations and offshore accommodation platform design.
• In July, Ballast Nedam confirmed that it had installed all 80 monopiles at the Butendiek offshore windfarm in the German sector of the North Sea. Installation of the monopiles was completed well within the four-month timeframe allotted to the work. The installation work was performed by the heavy-lift vessel Svanen, using a continuous stream of monopiles transported from Esbjerg.
• Demand from the offshore wind industry has led Innovatum to add a second Saab Seaeye Cougar XT Compact to its fleet of remotely operated vehicles. Designed especially for working in shallow waters and in tight situations, the low profile Cougar XT Compact minimises the effect of current with its reduced frame size, buoyancy and weight and a thinner 17mm tether cable that reduces the effect of drag.
• In July, E.ON’s Humber Gateway offshore windfarm operations and maintenance base was opened by the UK secretary of state for communities and local government the Right Honourable Eric Pickles MP. In the same week, with 61 of the 73 foundations already installed, E.ON celebrated the installation of the first two wind turbines.
• Osbit Power in the UK has supplied a bespoke cable-handling system to Technip Offshore Wind in support of its cable installation operations at Dong Energy’s Westermost Rough offshore windfarm. The quadrant system allows safe and efficient deployment and pull-in of infield cables, managing touchdown on the seabed and ensuring protection of the product as it is pulled into position at the turbine foundation. Installed on a support vessel, the system has been supporting operations since early June, following mobilisation of the deck spread at A&P Tyne.
Offshore Wind Journal I 3rd Quarter 2014 I 11
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