Offshore grid operator TenneT has issued a call for competition for the delivery and installation of submarine power cables that will connect offshore platforms to the Dutch grid.
The scope of the intended contracts includes design, engineering, production, delivery and installation of 220kV AC sea cables in order to connect the offshore AC platforms with the respective land stations. The scope may include 220kV AC land cable.
TenneT intends to build several platforms which will connect offshore wind farms to the onshore grid by HVAC sea cables. The platforms within one area, as part of redundancy requirements, will be connected by means of a 66kV cable.
The platforms are to carry high-voltage switching and transformation equipment 220kV as well as auxiliary facilities. Intake power from the wind farms will be 66kV, export power from the platform will be 220kV.
Each platform is connected to the onshore grid by two three-core 220kV AC sea cable circuits and, if applicable, by single-core 220kV AC land cables.