Germany's DolWin2 offshore link is off for repairs
Source: TenneT Holding B.V.
The DolWin2 offshore grid connection in the North Sea is now offline so that transmission system operator (TSO) TenneT can identify the cause for several unplanned automatic shutdowns since April.
The TSO has engaged ABB Ltd (VTX:ABBN) to investigate the issue and take measures to remove the cause, TenneT said Tuesday.
DolWin2 will connect the Gode Wind 2 and Gode Wind 1 offshore wind farms in Germany, which have a combined capacity of 582 MW. The 916-MW connection went online in February, but a cable component has failed repeatedly in the test phase. TenneT said there have already been five unplanned automatic shutdowns of the network connection. The TSO believes these are due to a fault in the high-voltage, direct current (HVDC) cable.
ABB and TenneT will check whether the issue is due to a unique or a systemic material error. DolWin2 uses 90 km of land cable and 45 km of submarine cable. It connects to the mainland at Doerpen-West.