DolWin3
OperationalOffshore GridDE900 MW320 kV206.4 km2018
Basic information
9 fieldsAlso Known As
HVDC DolWin3 · DolWin 3 · DolWin3 grid connection · TenneT DolWin3 · DolWin3 (DOL3) · DOL3
Status
operational
Capacity
900 MW
Project Company
Type
offshore grid
Transmission Model
TSO Build & Own
Expected Life
40 years
Website
Supply Chain (7)
Project Timeline (11)
2018Commercial Operations Full Power
DolWin3 grid connection system commissioned and operational.
~Jan 2018Construction Other
By early 2018, full hookup and integration of the DolWin3 system components, including the DolWin gamma platform and associated HVDC cable connections installed by contractors such as GE and Prysmian, had been completed, marking the end of major construction activities for the 900 MW offshore grid connection.
Jun 2017Construction Other
The topside of the DolWin gamma offshore converter platform for the DolWin3 HVDC link sailed out from Rostock in June 2017 for transport to its final position approximately 85 km off the German North Sea coast, marking a key offshore construction and logistics milestone.
2016Financial Other
In 2016, TenneT raised EUR 500 million to finance the "DolWin Trio" group of offshore grid connection projects, which includes the DolWin3 HVDC link. The financing, reported by offshoreWIND.biz under the title "TenneT Raises EUR 500 Million for DolWin Trio," provided dedicated capital towards these offshore transmission investments in the German North Sea.
May 2016Construction Other
In May 2016, the substructure of the DolWin gamma platform, consisting of two jacket foundations, was transported from the fabrication yard to the North Sea installation site for the DolWin3 offshore grid connection, preparing for offshore installation of the converter platform.
30 Jan 2015Manufacturing Update
On 30 January 2015, a steel element weighing almost 200 tons was placed in the dock at Nordic Yards in Warnemünde for the DolWin gamma offshore converter platform, marking a key fabrication milestone in the manufacturing of the DolWin3 HVDC platform structure prior to its planned installation in the German North Sea.
2014Cable Supplier Selected
By 2014, Prysmian Group had been contracted by TenneT to supply the ±320 kV DC XLPE submarine and land HVDC cables for the DolWin3 project, with a contract valued at approximately €350 million for the 2014–2016 period, providing the 83 km undersea and associated land cables that link the DolWin gamma offshore platform to the onshore converter station.
9 Oct 2014Construction Other
Fabrication of the DolWin gamma offshore converter platform for the HVDC DolWin3 grid connection commenced on 9 October 2014 at the Nordic Yards shipyard in Warnemünde (Rostock), Germany, marking the start of physical construction of the offshore platform that links the connected wind farms to TenneT’s transmission grid.
9 Oct 2014Offshore Construction Start
Nordic Yards started construction of DolWin gamma offshore converter platform on 9 October 2014 at Warnemunde shipyard. Alstom (later GE) provided HVDC technology. Platform dock-laid February 2015.
Feb 2013Converter Supplier Selected
In February 2013, TenneT Offshore GmbH awarded GE Vernova a turnkey contract for the DolWin3 HVDC grid connection in the German North Sea, appointing GE as supplier of the voltage source converter (VSC) systems and associated HVDC equipment for the 900 MW offshore-to-onshore link between the DolWin gamma platform and the onshore grid.