In the future energy will be transmitted between Scandinavia and central Europe via an offshore energy grid in the Baltic Sea. The German transmission provider 50Hertz and the Danish provider Energinet.dk are planning the construction of a transmission line in the border triangle Germany, Denmark, and Sweden. The transmission line will connect two different offshore wind farms.
So far offshore wind farms are only connected to their local national energy grid. Because of this one-of-a-kind project the European Union is funding the Kriegers Flak Combined Grid Solution with 150 million Euros.
Starting 2018 the danish wind farm (600 Megawatt) and the german wind farm Baltic 2 (288 Megawatt) will be connected. Two parallel undersea cable with 150-Kilovolt will be transmitting the energy between the wind parks over a length of 15 Kilometer.
This connection between two different grids has many advantages: In times of strong wind the power output does not need to be reduced any more and can be distributed to Scandinavia or Germany. Currently in times of strong wind the power output needs to be reduced to not overload the grid. If there is no wind the surplus energy produced by the scandinavian hydro-power plants can be transmitted to Germany.