The wind turbines will be located between 12 and 20 km offshore at depths varying between 12 and 25 m. The location will be on the Guérande bank where the location has many advantages for the establishment of an offshore wind farm: a strong and constant wind, a depth that is quite shallow and a location that is away from the main commercial shipping routes. The planned production is equivalent to covering about 20% of the electricity demand of the Loire-Atlantique and therefore an average annual electricity consumption of 700,000 inhabitants, or 54% of the inhabitants of the Loire-Atlantique.

EDF Energies Nouvelles, DONG Energy, Nass & Wind Offshore and the GE-Alstom group can benefit from their extensive experience in offshore wind power to carry out the wind farm project in Saint-Nazaire.

EDF Energies Nouvelles, a subsidiary of the EDF group, brings its know-how in the development of renewable energy projects but also in the expertise of the EDF group in very large-scale energy projects.

The Haliade wind turbine was specially designed by Alstom engineers (GE-Alstom Group) to be installed at sea and will be manufactured in France in Saint-Nazaire. This wind turbine is the most powerful wind turbine in the world currently in operation. The turbine has a rotor of 220 meters and blades with a length of 107 meters. The combination of a more powerful generator, longer blades and a higher capacitance factor makes the Haliade-X less susceptible to variations in wind speed, increasing the ability to generate more energy at low wind speeds.

The first foundations of the park arrived at the end of February at the port of La Rochelle. They will then be transported and installed at sea thanks to DEME Group’s « Innovation » vessel. Indeed, they are laid between 12 and 25 meters deep on the seabed, these foundations will be connected to the transition parts before being connected to the 80 wind turbines of the offshore wind farm in Saint-Nazaire.

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by Andréa Arbiol