Rhenus of Bremerhven has won a tender to set up and operate a central storage depot in north-west Germany to hold primary spare parts for maintenance of maritime cable systems for offshore wind stations.
Germany's transmission system operator Tennet Offshore has eleven offshore cable system under development or in operation in the North Sea, representing more than 6.2GW of capacity.
Another 1.8GW of cable capacity is in the tendering procedure for BorWin 3 and BorWin 4. Under Germany's Offshore Network Development Plan, six maritime direct current (DC) cable systems, adding 5.4GW, will be tendered by 2023.
Tennet is under formal investigation by German energy regulator Bundesnetzagentur for delays in providing grid connections for Dong Energy's Borkum Riffgrund 1 and 2 wind farms.
North Sea - Tennet maritime cable project status
Alpha Ventus AC 60MW In operation since 2009
BorWin 1 DC 400MW In operation since 2010
BorWin 2 DC 800MW Trial operation to end 2015
DolWin 1 DC 800MW Trial operation to end 2014
DolWin 2 DC 900MW Trial operation to end 2015
DolWin 3 DC 900MW Trial operation to end 2018
HelWin 1 DC 576MW Trial operation to end 2014
HelWin 2 DC 690MW Trial operation to end 2015
Nordergründe AC 111MW Trial operation to end 2015
Riffgat AC 108MW Trial operation to end 2013
Sylwin 1 DC 864MW Trial operation to end 2014