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).
Germany's longest DC grid connection
About the project
In April 2015, TenneT commissioned SylWin1, currently the longest offshore grid connection in the world. SylWin1 connects the DanTysk, Butendiek and Sandbank wind farms 70 kilometres off the coast of Sylt to the mainland. With SylWin1 with an output of 864 megawatts (MW), the wind farms can feed large quantities of wind power into the German power grid via a high-voltage direct current connection (HVDC). To transport the energy generated by a total of 232 wind turbines to the onshore converter station in Büttel, a distance of 205 kilometers must be bridged: 160 kilometers of submarine cable and 45 kilometers of land cable. The submarine cable route in the coastal sea and the land cable run parallel to the route for the HelWin1 project, thus reducing the impact on nature and the environment. SylWin1 is one of the large-scale offshore grid connections and can supply more than one million households with clean wind energy.