Vattenfall and TenneT sign agreement for Hollandse Kust Zuid 3 & 4 offshore grid connection

Vattenfall and TenneT have signed an agreement for the offshore grid connection for wind farm Hollandse Kust Zuid 3 & 4, an offshore wind project in the North Sea. 

The Dutch government has assigned TenneT as its offshore grid operator. The Energy Agreement sets out that TenneT will install 1,400 MW of offshore grid connections for the Hollandse Kust Zuid site, and provide for additional flexible transport capacity. The plan is for operations on the connection for Hollandse Kust Zuid 1 & 2 to commence in 2021. The offshore grid connection for plots 3 & 4 will follow in 2022. All plots will be developed by Vattenfall.

The grid connection for Hollandse Kust Zuid consist of two offshore transformer platforms, each with two 220 kV AC cables per platform. Electricity is transferred to onshore infrastructure via these cables.

TenneT is building a new onshore transformer station and is expanding the 'Maasvlakte 380 kV' high-voltage station. At this high-voltage station, offshore wind energy is connected to the south ring of the Randstad 380 kV line operated by TenneT. Wind energy is then transferred to power consumers via the national high-voltage network.