Prysmian Group has completed its work on the High Voltage Direct Current
offshore grid connection project located off the German North Sea coast.
Prysmian secured the project in February 2013, with a contract awarded
by Alstom Grid (now GE Grid GmbH) on behalf of the Dutch-German grid operator
Prysmian was responsible for the supply, installation and commissioning
of the HVDC ± 320 kV extruded submarine and land power cable connections
with a rating of 900 MW and the associated fibre optic cable system, covering
a 78 km land route and an 83 km subsea route. The cables were produced
at the Prysmian Group's and manufacturing facilities in Arco Felice (Italy),
Pikkala (Finland) and Delft (The Netherlands).
“We are very proud of having contributed to the development of such an
important renewable energy project proving our ability to provide tailor-made
submarine cable solutions to support the growth of clean energy in Northern
Europe," stated Hakan Ozmen, EVP Projects, Prysmian Group.
is the third grid connection of the DolWin wind farm cluster, located in
the south western region of the North Sea. This offshore grid connection
project will feed up to 900MW of wind energy generated offshore to the
Two wind farms in the south western part of the German North Sea connect
onshore via the link, Merkur
It will convert the three-phase Alternating Current (AC) generated by the
wind farms to Direct Current (DC). It will then transport offshore wind
energy ashore using over 80km of submarine cable and 80km of onshore cable
to a converter station in Dörpen West, Lower Saxony. The electricity
is then converted back into AC for integration into the German national
The offshore platform is linked to another nearby converter, DolWin
for wind energy to be routed through either of the platforms in the event
of an output or cable failure. The connection uses a cable with a 800mm2
cross-section and has been designed to withstand the strong winds and rough
wave conditions of the North Sea.
TenneT has been providing grid connections for offshore wind farms in the
North Sea since 2006. These include BorWin1,
the world's first and over 200-kilometer DC link between an offshore wind
farm and the shore power grid, which has been in operation since 2015.
In addition to the nine network connections already completed, TenneT will
commission three additional offshore grid connections by the end of 2019,
meaning that more than 7 GW of offshore wind energy from the North Sea
will be available. The transmission system operator expects four more network
connections to be online by 2025, providing a total of over 10 GW of transmission
For more information on offshore wind grid connection projects worldwide,
You can view cable routes for wind farms and offshore infrastructure
Offshore's Interactive Map.