TenneT lays deep-water submarine cables for North Sea transmission system

The Dolwin6 power transmission system. Image by TenneT. All Rights Reserved.

September 3 (Renewables Now) - Transmission system operator (TSO) TenneT has laid 33 km (20.51mi) of submarine cables in the deep waters of the North Sea as part of the construction of the Dolwin6 power transmission system which will link offshore wind farms in German waters to the onshore electricity grid.

The high-voltage direct current (HVDC) cables were laid with the help of a ship operated by DEME Group to the planned location of the offshore Dolwin kappa converter station, starting from the 12-metre waterline, TenneT said on Wednesday.

The cables in the shallow water section from the beach will be laid in mid-2022 as bad weather conditions currently pose safety risks, while cables on the offshore converter station will be installed in the late summer of 2022.

The Dolwin6 power transmission system will be completed in 2023 and will have a maximum capacity to transport up to 900 MW of green electricity generated by the offshore wind farms in German waters. The 90-km route, including 45 km of offshore and 45 km of onshore cables, will cross the Norderney island to reach the city of Emden, Lower Saxony, where it will be connected to the grid.

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