Scoping analysis of the potential yield of the Hollandse Kust (Noord) wind farm and the influence on the existing wind farms in the proximity

The HKN wind farm zone consists of a single site which is designated to be developed with a 700 MW offshore wind farm. The site will be tendered to the developers in 2019. It is decided that the site will have a guaranteed nominal power of 700 MW but the development plan can go up to 760 MW (overplanting).

The export transmission system will have a guaranteed capacity to transmit at least 700 MW to the national grid on shore. However, under normal conditions, the transmission system is capable to transmit the generated power – minus the internal electrical losses to the national grid. Only when the export cable core temperature increases above a limit temperature the output of the site will be curtailed to 700 MW. For the HKN wind farm zone, 2 designs have been made.

One design consisting of 8 MW wind turbines with a rotor diameter of 164 m and one design consisting of 10 MW wind turbines with a rotor diameter of 196 m. These wind turbine models differ with respect to the rotor power density. The potential energy production has been calculated and the influence of the HKN wind farm on the production of the existing wind farms in the proximity, the reference case.

The wind farms in the proximity are:

• Wind Farm Prinses Amalia, consisting of 60 Vestas V80, 2 MW wind turbines and

• Wind Farm OWEZ, consisting of 36 Vestas V90, 3 MW wind turbines. The wind resources have been determined at the centre location of the HKN wind farm zone. The potential energy yield has been determined for the reference case, i.e. the wind farms Prinses Amalia and OWEZ and for:

• HKN consisting of 8 MW wind turbines and with the reference wind farms;

• HKN consisting of 10 MW wind turbines and with the reference wind farms; In each case the wake losses have been determined for all wind farms. For the Prinses Amalia wind farm the maximum additional loss due to the HKN wind farm is 2.8%. For the OWEZ wind farm the maximum additional loss due to the HKN wind farm is 2.1%. For simplicity no losses due to the internal electrical losses, availability and environmental requirements are taken into account.