HelWin2
OperationalOffshore GridDE690 MW320 kV134 km2015
Basic information
9 fieldsAlso Known As
NOR-4-2
Status
operational
Capacity
690 MW
Project Company
Type
offshore grid
Transmission Model
TSO Build & Own
Expected Life
40 years
Website
Supply Chain (9)
Project Timeline (5)
2015System Testing
TenneT’s HelWin2 (NOR-4-2) 690 MW VSC-HVDC grid connection underwent system commissioning around 2015. Under a contract worth over €200 million, Prysmian supplied, installed and commissioned the ±320 kV, ~130 km submarine and land cable system linking the Amrumbank West wind farm area in the HelWin cluster to the onshore converter station at Büttel, while Siemens provided the 690 MW Voltage Sourced Converter system; commissioning and commencement of commercial operation of the HVDC link were planned for 2015 and later reported with HelWin2 in operation from 2015.
2015Commercial Operations Full Power
HelWin2 grid connection system commissioned and operational.
Jun 2014Construction Other
In June 2014, the 10,500‑ton topside of the HelWin2 HVDC converter platform was loaded out from Heerema Fabrication Group’s yard at Zwijndrecht in the Netherlands for transport to its offshore site in the German Bight, marking a key construction milestone for TenneT’s 690 MW HelWin2 grid connection.
2 Aug 2011Cable Supplier Selected
On 2 August 2011, TenneT awarded Prysmian a contract worth in excess of €200 million for the HelWin2 grid connection, covering the complete supply, installation and commissioning of the ±320 kV HVDC submarine and land cable system (about 85 km sea route plus 45 km land route) to the Büttel converter station, as well as 155 kV HVAC submarine cables linking the Amrumbank West offshore wind park transformer to the HelWin Beta offshore converter platform.
2 Aug 2011Converter Supplier Selected
As part of an approximately €600 million consortium contract for the HelWin2 project awarded by TenneT, Siemens Energy was selected to supply the 690 MW HVDC Plus voltage-sourced converter system, providing converter equipment on the HelWin Beta offshore platform and at the onshore Büttel converter station to transmit power from the Amrumbank West wind park to the German grid.