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Transport and installation of the 900-megawatt DolWin Kappa offshore converter station for the DolWin6 offshore grid connection system in the German North Sea.
Company : Dragados Offshore (TenneT, Siemens Energy)
Project : DolWin Kappa Offshore Converter Installation
Location : German North Sea
29 m
Max water depth
Scope of work
- Transport & installation of 5000-tonne jacket, 11,000-tonne transformer topsides & bridge
- Lift, stab & drive the foundation piles (including noise mitigation)
- Grout the annulus between the piles and pile sleeves
- Perform jacket cut-off
- Perform ROV debris survey
5000-tonne
jacket
11,000-tonne
transformer topsides
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Specials & challenges
- Allseas’ first complete transformer transport & installation (T&I) for the offshore wind industry
- First offshore wind project for Allseas in the German Bight
- First-time piling of foundation jacket from Pioneering Spirit
- Strict environmental regulations & new legislative area of operations
- 12-day campaign covering departure from Rotterdam to completion of offshore works installation of jacket, piling of jacket, topsides installation
- DolWin6 connection will provide more than 1 million homes with renewable energy from 2023
1 million
homes with renewable energy
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