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Arkona topside disembarks for wind farm

By: Matthew White 22/03/2018 50hertz

General Substations Windfarms

The Topside of the Arkona offshore transformer platform left the shipyard by means of a high-sea tug. The overide platform and its structure have been built and equipped over the past 20 months as a collaborative project between 50Hertz, E.ON and Statoil, and within the next few days, the topside should reach the platform 2,550 Miles away Baltic Sea. The prerequisite for this nautical operation is a favourable weather window, that has good visibility and low swell.

In the past few days, 50Hertz, Arkona and STX employees claim they have made all their own electrotechnical systems in the Arkona transformer platform for offshore transport seaworthy. This ensures that the 50Hertz technology, such as compensation choke coils or gas-insulated switchgear (GIS), is not damaged in rough seas.

Throughout the shipment, the Topside will be fixed on a floating pontoon. The pontoon is towed by a tugboat, which is moored to the bow. The tow band was initially brought to the tide-dependent level of the Atlantic. There, the transport headed towards the Atlantic through the Loire estuary to the open sea. From here, the ship's convoy takes the route across the Bay of Biscay, across the Channel to the North Sea at the northern end of Denmark, through Skagerrak and Kattegat to the Baltic Sea.

50-hertz state that at the beginning of April, the 4,000-ton topside will then be lifted onto the anchored jacket in the sea with a heavy-duty crane ship. The lift will be operated by Seaway Heavy Lifting (SHL) Oleg Strashnov, currently one of the largest crane ship available in the Baltic Sea.

Recently OSS Arkona was handed over to E.ON, Statoil and 50Hertz in a festive ceremony organized by STX France. The Arkona platform forms the centerpiece of the Arkona offshore wind farm operated by E.ON and Statoil. The renewable energy of the individual wind turbines is bundled there and transported by 220 kilovolt submarine cable to the mainland to the Lubmin substation in Mecklenburg-Vorpommern.

Arkona is designed to feed 400,000 households thanks to its 385MW power. This equipment designed by STX France, has outstanding dimensions i.e 4,000 tons for the topside and 1,200 tons for the jacket.

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Arkona topside disembarks for wind farm

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