HVDC DolWin 3

Location: South-western part of the German North Sea
Type of personnel: Rigger, Marine Superintendent, Deck Foreman (16 people)
Support: Offshore wind farms
Date: 2017

SCOPE OF WORK

Installation of an electrical substation (built on a platform)
Assistance for tow and float over of platform

DESCRIPTION OF THE PROJECT

The Dolwin3 project establishes a 900 megawatt (MW) direct current (DC) grid connection for wind farms in the south-western part of the German North Sea.
DolWin3 is the third grid connection project in the DolWin cluster. A high-voltage direct current (HVDC) transmission system line connects the offshore converter platform DolWin gamma with the corresponding onshore converter station in Dörpen/West.
The offshore converter station is used to convert the alternating current (AC) generated by the connected wind farms into DC. The DC power runs via subsea and land cables to the converter station onshore, where it is re-converted into AC. This is also the grid junction point which makes the connection to the German transmission grid. The connection is expected to be completed in 2018.

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