The 900 MW DolWin5 offshore grid connection project uses extra-high voltage direct current transmission technology. The three-phase alternating current (AC) generated by the offshore wind farm is converted into direct current (DC) at DolWin epsilon and transported south to Hamswehrum near the river Ems in East Frisia via a 100-kilometre-long subsea cable.
From Hamswehrum, a 30-kilometre-long onshore cable leads to the converter station in Emden/East where the DC is converted back into three-phase AC and fed into the extra-high voltage grid on land.
As for Borkum Riffgrund 3, offshore work is progressing on schedule, according to Ørsted, with all foundations and 85 per cent of the wind turbines installed. The developer expects the offshore installation work to be completed before the end of this year.
Related Article
First Turbine Up at Ørsted’s Borkum Riffgrund 3 Offshore Wind Farm in Germany
Borkum Riffgrund 3 is being built simultaneously with the 253 MW Gode Wind 3, which already delivered its first power in May this year.
At Gode Wind 3, the construction has been completed and the final wind turbines are now undergoing the 240-hour test before the wind farm is fully commissioned.
NOTE: The original article was updated on 6 December with information about the cause of the grid connection delay received from TenneT.
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