Another step towards supplying wind energy to the German electricity grid has been successfully taken. The land cables have now been installed underground over a distance of three kilometres from the landing point, where the sea cables meet the mainland, to the Lubmin transformer station.

Using so-called HDD drilling – also known as horizontal directional drilling – the necessary protective ducts had already been installed in the course of the Ostwind 1 project. The HDD drilling technique was used so as not to interfere with the above-ground nature reserve. Now the high-voltage cables could be pulled into the existing underground protective ducts.

Before the electricity generated on the Baltic Sea can be brought onshore by sea cable and supplied to the 50Hertz transmission grid, foundations for the primary electrical equipment have to be built in the substation. Until the foundations are completed and the shunt reactors, High voltage transformers  and switchgear are installed, the ends of the cables lie secured within the site. After that, the cables are pulled to their intended end positions and connected to the transformer station. In addition, joints connecting the sections of the land cable will be installed on certain sections over the next few months. When the primary electrical equipment is installed, the cables are terminated into the substation and the intermediate joints have been completed, the sea cables can be connected to the land cable at the landing point on the Greifswalder Bodden.

Ostwind 2 is the project to connect the Baltic Sea wind farms Arcadis Ost 1 and Baltic Eagle to the German high voltage grid. Together, the two wind farms are to generate a capacity of approximately 725 megawatts (MW). Arcadis Ost 1, the wind farm of the Belgian company Parkwind, is located in the West of Arkona cluster. Baltic Eagle, the project of the Spanish energy company Iberdrola, is located in the Arkona Sea cluster. It is about 20 kilometres (Arcadis Ost 1) or 30 kilometres (Baltic Eagle) to the nearest coast of Rügen, and about 90 kilometres to Lubmin to the substation on the Greifswalder Bodden.

source: 50hertz