Offshore wind farm
The Saint Nazaire wind farm is an offshore wind project being developed in the Loire-Atlantique region in France.
It is owned by Eolien Maritime France (EMF), a joint venture formed in May 2016 between EDF Renewables (50%) and its subsidiary Enbridge (50%).
EMF won the competitive bidding for the project in 2012 from the French Government while the operating permit was received in August 2016. The final administrative permit to operate the wind farm was granted in June 2019.
The €2bn ($2.21bn) project is being developed as a part of the government’s aim to increase renewable energy’s share in consumption to 32% by 2030.
EMF is developing three other wind farms apart from the Saint Nazaire project, including Dunkirk, Fecamp, and Courseulles in France with a combined capacity of 1.42GW.
Once operational in 2022, the Saint Nazaire wind farm will supply for approximately 20% of the domestic electricity consumption of the Loire-Atlantique region.
The construction phase of the project will generate more than 1,000 jobs in Pays de la Loire region while 100 jobs are anticipated to be created for the operations and maintenance activities at the port of La Turballe.
The Saint Nazaire wind farm will be situated on the bench of Guérande, approximately 12km from the coastline.
The site was selected due to strong and steady winds, as well as shallow water depth. It also did not have constraints such as regulatory easements and maritime safety and was located away from major commercial shipping routes.
The Saint Nazaire offshore wind farm will be equipped with 80 Siemens SWT-7.0-154 7MW turbines.
The SWT-7.0-154MW wind turbine has a rotor diameter of 154m and a swept area of 18,600m². The rotor of the turbine is fitted with Siemens B75 blade.
The wind turbines will be installed at depths between 12m and 25m on monopole foundations approximately 12km to 20km offshore. They will be equipped with direct drive technology, a High Wind Ride Through (HWRT) system, IntegralBlade® technology, and remote diagnostics services.
The electricity generated by the wind farm will be transmitted through a 33km submarine link and a 27km underground link to Saint-Nazaire Trignac, Montoir-de-Bretagne, Donges and Prinquiau. A substation in Prinquiau will also be constructed.
The power generated from the offshore wind farm will be evacuated to the national grid operated by Réseau de Transport d’Électricité (RTE), which will be responsible for the construction of the transmission infrastructure.
The port of La Turballe has been selected as the base port for the operating and maintenance activities of the project. The site will feature a control room and telecommunication office, changing rooms and a storage warehouse.
The maintenance building will be located just before the shroud area and have a surface of 1,250m². Construction is scheduled to start in 2019 and be completed by 2020.
A 25m-long and two 30m-long vessels will be moored on three pontoons along the Spanish wharf of the port. The vessels will be used to transfer 12 maintenance technicians daily to the project site.
Siemens Gamesa Renewable Energy signed a framework agreement with EMF to supply the wind turbines for the project in April 2019.
Consulting firms, including Quiet Ocean, Sinay, and Biotope, were involved in environmental monitoring for the project, while Fugro was involved in conducting geotechnical surveys.
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