transmission system operator TenneT has started the construction of the
converter station for the DolWin6
offshore transmission system project. Over the next 6 months, 24 metre
long piles will be drilled into the ground to create a stable foundation
for the converter station located in Emden.
will convert the 155kV alternating current electricity generated by the
offshore wind turbines into 320kV direct current and transmit it to Hilgenriedersiel
on the mainland via a 45km subsea cable. The subsea cable will pass underneath
the island of Norderney by means of horizontal bore holes. Once on land,
the electricity will be transported another 45km to Emden, East Frisia,
where Siemens is building another converter station for converting the
direct current back into three-phase current and feeding it into the high
grid connection project, which will span around 90km in length, can connect
multiple offshore wind turbines to the mainland. A number of offshore wind
farms are competing for a connection to DolWin6
in an auction held by the German Gederay Network Agency. The Gode
Wind 3 project
has already been awarded a contract with additional offshore wind farms
to follow in the next capacity auction.
As with its predecessors DolWin3
is a direct current connection with a transmission capacity of 900 MW.
After it is completed, DolWin6
will be able to transmit enough electricity to supply just under one million
German homes. Commercial commissioning is scheduled for 2023.
For more information about transmission systems and wind farms, click