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).
First 916 MW grid connection
About the project
With an output of 800 megawatts (MW), BorWin2 together with HelWin1 (576 MW) is the first large-scale offshore connection that TenneT has implemented and which has enabled more than one offshore wind farm to be connected to the power grid for the first time. Since January 2015, the 147 wind turbines of the two offshore wind farms Global Tech I and Veja Mate have been feeding large quantities of clean wind energy into the German power grid via BorWin2. In summer 2019, the grid connection of Global Tech 1 was transferred from BorWin2 to BorWin3.
The distance between BorWin beta, the offshore platform in the BorWin2 grid connection project, and the land is 110 kilometers. This makes BorWin beta the offshore converter platform furthest out at sea. The network connection is 200 kilometers long. To ensure that the electricity generated at sea can be transmitted efficiently, TenneT uses high-voltage direct current (HVDC) transmission at BorWin2. With this technology, large quantities of electricity can be transported over long distances with low losses. Electricity from the North Sea is transported to the mainland via a 125-kilometer submarine cable. The 75-kilometer-long underground cable runs from the landfall in Hilgenriedersiel to the network connection point Diele. The land route for BorWin2 was executed parallel to the route for the BorWin1 project. This bundling has made it possible to limit interference with nature and the environment.