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).
Clean wind energy for around one million German households
About the project
DolWin1 is the first offshore project that TenneT has realized off the bay of Dollart - in the so-called DolWin cluster. Since 2015, up to 800 megawatts (MW) of electricity have been transported over a distance of 165 kilometers through the North Sea and across the mainland using the powerful DolWin1 high-voltage direct current connection. The network connection runs 75 kilometers at sea and another 90 kilometers over land to the converter station in Dörpen West (Heede). Here, the wind power generated at sea is converted from direct current into three-phase current and fed into the grid.
DolWin1 connects three wind farms with a total of 184 wind turbines to the German transmission grid. In purely arithmetical terms, around one million households can be supplied with clean energy from the North Sea. From 2019, another 40 wind turbines will feed their electricity into the grid via DolWin1. DolWin1 was already the fifth grid connection that TenneT put into operation in 2015.