Nordergründe
OperationalOffshore GridDE111 MW155 kV32 km2017
Basic information
8 fieldsAlso Known As
NOR-0-2 · Offshore grid connection Nordergründe · Nordergründe offshore grid connection
Status
operational
Capacity
111 MW
Owners
Project Company
Type
offshore grid
Transmission Model
TSO Build & Own
Website
Supply Chain (5)
Project Timeline (14)
1 Mar 2018Manufacturing Update
On 1 March 2018, NKT reported that it had delivered, successfully commissioned, and handed over the 155 kV high-voltage AC Nordergründe offshore wind transmission link to TenneT, marking completion of its turnkey export cable system supply for the grid connection.
3 Jan 2018System Testing
By early January 2018, NKT had completed its turnkey scope for the Nordergründe offshore grid connection, successfully commissioning the 155 kV high-voltage AC transmission link and handing over the fully delivered export cable system to TenneT as the Dutch-German TSO and owner of the connection.
2017Onss Commissioned
Nordergründe grid connection system commissioned and operational.
Dec 2017Commercial Operations Full Power
The Nordergründe offshore wind farm grid connection reached full commercial operation in December 2017. NKT delivered the turnkey 155 kV AC cable system comprising 26.5 km of submarine cable and 4 km of underground cable connecting the 111 MW wind farm to TenneT's Inhausen 220 kV substation near Wilhelmshaven. The grid connection was completed after NKT made the final connection of the submarine cable system following completion of the offshore platform in September 2017.
31 Oct 2017First Power
TenneT commissioned the Nordergründe offshore grid connection on 31 October 2017, enabling electricity from the 18‑turbine Nordergründe offshore wind farm to start flowing through the AC export link to the mainland grid. This followed completion of the export cable installation in summer 2016 and the delayed installation and hook‑up of the offshore substation in September 2017.
20 Sept 2017Construction Other
The offshore substation topside for the Nordergründe offshore grid connection was loaded onto a barge in Bremerhaven and sailed to the installation site in the German North Sea, marking a key step in delivering the grid connection for the 111 MW project.
~Jul 2016Cable Installation Complete
TenneT completed installation of the Nordergründe export cable by the summer of 2016, finishing the laying of the 32km, 155kV AC connection comprising approximately 28km of subsea cable and 4km of onshore cable between the wind farm area and the Inhausen substation. From that point, the seaward end of the cable in the wind farm area was in place and awaiting connection into the offshore substation platform.
23 Apr 2015Procurement Other
By 23 April 2015, grid operator TenneT had contracted Bitek Bergungsdienst to carry out unexploded ordnance (UXO) clearance along the 28 km cable route for the Nordergründe offshore grid connection in the Weser estuary, preparing the export cable corridor for subsequent installation.
2013Onss Commissioned
The onshore substation at Innhausen, north of Wilhelmshaven, which serves as the grid connection point for the Nordergründe offshore project, was expanded around 2013 to accommodate the 155 kV export link, enabling the power to be transformed to 220 kV and fed into the 220 kV transmission network after the 4 km land cable from the shore was laid starting in autumn 2012.
~Oct 2012Onshore Construction Start
Onshore construction for the Nordergründe offshore grid connection began in autumn 2012 with the start of laying works for the 4km onshore section of the 155kV export cable linking the wind farm’s landfall to the Inhausen substation. The onshore substation was subsequently expanded in 2013 to accommodate the new 155/220kV connection into the 220kV transmission network.