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Gemini substations sucessfully installed

4C Offshore | Tom Russell
By: Tom Russell 31/08/2015 Van Oord
Van Oord has successfully installed the two Offshore High Voltage Stations (OHVS), Buitengaats and ZeeEnergie and the first 77 transition pieces at the Dutch Gemini Wind Park. The realisation of the large offshore wind project construction is proceeding as planned.

The OHVS installations were built in Hoboken (near Antwerp), Belgium, and transported, leaving Hoboken on 17th August 2015 to Eemshaven. Deploying a heavy lift vessel, the 2,500-tonne OHV Substations  were installed in their final location at the wind farm using the Rambiz placing the mega structure onto its jacket foundation. The first jacket being installed earlier on August 6th 2015, the second installed on August 13th 2015.

The OHV Substations convert the energy generated to 220V. The platforms are connected to the Dutch power grid via export cables.

Construction of the wind park is in full swing. This year two ships including Van Oord’s offshore installation vessel Aeolus will install the remaining 73 foundations for the project. The Siemens wind turbines will be installed in the spring of 2016.

Other vessels in the Van Oord fleet are also playing an important role in the construction of the Gemini wind park 85 km off the coast of Groningen. The cable-laying vessel Nexusis installing two export cables, each measuring 100 km. These will be buried in the seabed by the Jan Steen, a multi-purpose vessel fitted with a larger subsea trencher. The cable-laying vessel HAM 602 will install the cables between the foundations and the OHVSs and then the Jan Steen will bury them with the trencher.

On the 26 August 2015 Van oord completed installing the first two monopile entry systems (Pro-MES).

The Gemini project, which should be operational in 2017, will be considered one of the largest wind projects in the world. It is also constructed further from land than any other wind farm (85 km off the Dutch coast). When complete, the park will have a total power capacity of 600 MW and will supply 785,000 households with green electricity, which corresponds to a reduction in emissions of 1,250,000 tons of CO2.

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