• 2021 August 19 13:54

    DEME installs first offshore substation in France at Saint-Nazaire offshore wind farm

    In another pioneering step in the offshore wind industry, DEME installed the first offshore substation (OSS) in France. Weighing 2,100 tons, the OSS was successfully installed at the Saint-Nazaire offshore wind farm on August 18, according to the company's release.

    The electrical substation was constructed by a consortium including Atlantique Offshore Energy, the business unit of Chantiers de l’Atlantique dedicated to Renewable Marine Energies, GE Grid Solutions and DEME Group’s French subsidiary SDI. The 480 MW Saint-Nazaire offshore wind project is being developed by EDF Renouvelables and EIH S.à r.l, an indirect subsidiary of Enbridge Inc., and CPP Investments. Saint-Nazaire, scheduled to be operational in 2022, is the first commercial offshore wind farm installed in French waters. The contract for the substation was awarded in 2019.

    Installed with the ‘Pioneering Spirit’, the 480 MW substation is (H) 15 m x 27 m x 39 m, while the jacket is 26 m x 26 m x 48 m (H) and weighs 1,250 tons.

    The ACS division of GE Grid Solutions, located in Saint-Priest, France, designed and integrated the high and medium voltage systems. Those include five 220 kV gas insulated switchgears from Aix Les Bains, France, two 220/33kV transformers manufactured in Monchengladbach, Germany, two SCADA systems developed in Montpellier, France and one 33kV gas insulated switchgears and a telecommunication system.

    DEME Offshore carried out the transport and installation of the OSS, including the offshore pre-piling works. Chantiers de l’Atlantique is responsible for the topside and jacket foundation design, manufacturing and commissioning. GE Grid Solutions is responsible for the high voltage electrical equipment and protection control systems design, manufacturing and commissioning.

    The same consortium responsible for Saint-Nazaire has also been selected by Eoliennes Offshore des Hautes Falaises et Eoliennes Offshore du Calvados to design, manufacture and install the electrical substations for the Fécamp and Calvados (Courseulles-sur-Mer) wind farms in Normandy, France.

    About DEME Group

    DEME is a world leader in the highly specialised fields of dredging, solutions for the offshore energy market, environmental and infra marine works. The company can build on more than 140 years of know-how and experience is a front runner in innovation and new technologies.

    DEME’s vision is to work towards a sustainable future by offering solutions for global challenges: a rising sea level, a growing population, reduction of CO2 emissions, polluted rivers, seas and soils and the scarcity of natural resources.

    While the company’s roots are in Belgium, DEME has built a strong presence in all of the world’s seas and continents. DEME can rely on 5,200 highly skilled professionals across the globe. With a versatile and modern fleet of over 100 vessels, backed by a broad range of auxiliary equipment, the company can provide solutions for even the most complex projects.




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