Installations at sea
A number of platforms will be established in the offshore wind farm area to:
- collect the power from the offshore wind turbines via medium-voltage cables
- increase the voltage level in transformers to minimise electricity losses when electricity is transmitted to shore
- convert alternating current to direct current in a converter station in order to connect the East Danish power system to the German power system (the two systems are not synchronous).
Whether one large platform containing both transformers and converters or separate platforms will be constructed remains to be decided.
Submarine cables on the seabed will connect the offshore wind turbines to the platforms. From there, cables will be routed to Denmark (northern part of Køge Bugt) and Germany.
Installations on land
Land cable in Denmark
On land cables will transmit the electricity from the shores of Køge Bugt to the existing substation at Ishøj.
Substation in Denmark
At the Energinet.dk substation in Ishøj, a converter station will be built to convert direct current to alternating current. The station is able to transmit the electricity into the Danish power grid and out when the offshore power grid is used to export electricity from Denmark to Germany.
Installations in Germany
In Germany, cables will be laid from the shore to the north of Bentwisch to an existing substation in Güstrow. The Güstrow substation will have the same function as the Danish substation at Ishøj.
In addition, the Bentwisch substation will form part of the overall project as it will receive electricity from the German transformer platforms collecting the electricity generated by the two German offshore wind farms, Baltic 1 and Baltic 2.