A method of determining individual set points (Pref, Qref) in a power plant controller arranged to control a wind power plant comprising a plurality of wind turbine generators and optional compensation equipment capable of generating electrical output, the individual set points relating (Pref, Qref) to active and/or reactive power to be requested from each wind turbine generator of the plurality of wind turbines and the optional compensation equipment for delivery to an external electrical grid, the method comprising the steps of: a) receiving a request for active and/or reactive power to be delivered to the external electrical grid; b) determining correction factors (c) for each wind turbine generator in the plurality of wind turbine generators and for the optional compensation equipment, said correction factors (c) relating to condition information on the plurality of wind turbine generators and the optional compensation equipment; c) receiving signals (37, 38) indicating available active power and available reactive power from each of said wind turbine generators as well as from the optional compensation equipment; d) comparing the requested active power with said indicated available active power from the plurality of wind turbines and the optional compensation equipment of the wind power plant, and comparing the requested reactive power with said indicated available reactive power of the wind turbines and the optional compensation equipment; e) in the case where the comparison in step d) shows that the requested active power is less than the available active power of the wind turbines and the optional compensation equipment and/or the requested reactive power is less than the available reactive power of the wind turbines and the optional compensation equipment, carrying out the following step: f) calculating said individual set points relating to active power and/or reactive power based on the correction factors (c) and the received signals (37, 38) indicating available active power and reactive power from the wind turbine generators and the optional compensation equipment. a) receiving a request for active and/or reactive power to be delivered to the external electrical grid; b) determining correction factors (c) for each wind turbine generator in the plurality of wind turbine generators and for the optional compensation equipment, said correction factors (c) relating to condition information on the plurality of wind turbine generators and the optional compensation equipment; c) receiving signals (37, 38) indicating available active power and available reactive power from each of said wind turbine generators as well as from the optional compensation equipment; d) comparing the requested active power with said indicated available active power from the plurality of wind turbines and the optional compensation equipment of the wind power plant, and comparing the requested reactive power with said indicated available reactive power of the wind turbines and the optional compensation equipment; e) in the case where the comparison in step d) shows that the requested active power is less than the available active power of the wind turbines and the optional compensation equipment and/or the requested reactive power is less than the available reactive power of the wind turbines and the optional compensation equipment, carrying out the following step: f) calculating said individual set points relating to active power and/or reactive power based on the correction factors (c) and the received signals (37, 38) indicating available active power and reactive power from the wind turbine generators and the optional compensation equipment.