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Iberdrola and 50Hertz have signed an agreement to cooperate with regard to the construction, installation and commissioning of the offshore substation (OSS) for Baltic Eagle wind farm being developed in German waters of the Baltic Sea.
 
The jointly used offshore substation will house the technical equipment collecting the electricity produced by the wind turbines and will connect to the onshore transmission grid in Lubmin.
 
Iberdrola has further awarded contracts to the joint venture Iemants-Fabricom, responsible for the manufacturing of all structural elements of the substation, and to marine contractor Heerema, who will transport and install the substation on the Baltic Eagle site. Siemens Gas and Power is responsible for the delivery of all main electrical equipment for Iberdrola`s low-voltage part of the OSS.
 
The substation is made up of a foundation and a topside housing the transformers as well as electrical equipment. The four-legged steel jacket foundation weighs approximately 2,900 tonnes and will be fastened with two hammered piles at each leg. The topside consists of a closed multi-storey module of 5 decks with a total estimated net weight of around 4,250 tonnes. Fabrication is already progressing at different locations. Sail out to the site is planned for 2022, while completion of the offshore installation and commissioning is expected to take place in 2023.
 
The Baltic Eagle offshore wind farm is located northeast of the Rügen island off the Pomeranian coast in the Baltic Sea in a water depth of 40-45 meters. Iberdrola was awarded 476MW of capacity during the transitional auction held in 2018. The wind farm will comprise 50 wind turbines of 9.525MW capacity to be installed on monopile foundations and will cover an area of 40 km2. Commissioning is expected in 2024.
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