We are primarily tasked with providing power transmission services, system services and facilitating the energy market. Our core tasks follow from our appointment as grid operator under the Dutch 'Elektriciteitswet' (E-wet) and the German 'Energiewirtschaftsgesetz' (EnWG).
900 MW DC grid connection for clean wind energy from the North Sea
About the project
In addition to BorWin1, BorWin2 and BorWin3, BorWin5 is the fourth project that TenneT is realising off the coast of Borkum using direct current technology. The project is currently in the tendering phase.
According to the goals of the German government, a total of 15 gigawatts of offshore wind power capacity are to be available in Germany by 2030. With a transmission capacity of 900 MW, the BorWin5 project is an important component in achieving these expansion targets in Germany. BorWin 5 has a total length of approx. 230 kilometres. The starting point will be the offshore converter platform BorWin epsilon. There, the three-phase current generated by the offshore wind farm EnBW He Dreiht will be converted into direct current and transported to the mainland by a 110-kilometer submarine cable. From the landfall in Hilgenriedersiel, the electricity will be transmitted over a length of 120 kilometres by land cable to the future converter station in Garrel/Ost close to Cloppenburg. In the converter station, the direct current is converted back into three-phase current and from there fed into the onshore extra-high voltage grid.
As with most offshore grid connection systems for wind farms in the western North Sea, the cable route from BorWin5 also runs across the island of Norderney. In order to protect the sensitive natural environment in the Lower Saxon Wadden Sea National Park and to guarantee dike safety, TenneT carries out horizontal drilling on the island, into which cable protection pipes have been inserted. Here the offshore cables for BorWin5 are pulled in during cable laying