A method for controlling the operation of a wind farm comprising a plurality of wind turbines and control means arranged to be able to exchange data with each of the wind turbines of the wind farm, said method comprising the steps of: - establishing, for each wind turbine of the wind farm, a model for the wake effects caused by the given wind turbine for a given set of environmental conditions, - defining, for each wind turbine of the wind farm, a finite number of sets of operational set points including at least set points defining the pitch control of the individual wind turbine and set points defining the yaw control of the individual wind turbine, each of which set of operational set points corresponds to a defined operational performance including the relation between power production and the wind speed, at which that specific wind turbine can be operated, wherein the sets of operational set points define different operational performances, and wherein each set of operational set points are certified by the manufacturer of the wind turbine, - defining optimisation criterion for the wind farm, and - repeating the steps of: ∘ receiving data concerning environmental conditions around the wind farm ∘ optimising, on the basis of the received data concerning environmental conditions and the established models for wake effects, the operation of the wind farm by selecting the set of operational set points for each of the individual wind turbines, respectively, which, according to the corresponding operational performance results in the optimal fulfilment of the optimisation criterion for the wind farm ∘ sending data to the individual wind turbines instructing them to operate at the selected sets of operational set points, and ∘ operating the individual wind turbines of the wind farm at the selected sets of operational set points. - establishing, for each wind turbine of the wind farm, a model for the wake effects caused by the given wind turbine for a given set of environmental conditions, - defining, for each wind turbine of the wind farm, a finite number of sets of operational set points including at least set points defining the pitch control of the individual wind turbine and set points defining the yaw control of the individual wind turbine, each of which set of operational set points corresponds to a defined operational performance including the relation between power production and the wind speed, at which that specific wind turbine can be operated, wherein the sets of operational set points define different operational performances, and wherein each set of operational set points are certified by the manufacturer of the wind turbine, - defining optimisation criterion for the wind farm, and - repeating the steps of: ∘ receiving data concerning environmental conditions around the wind farm ∘ optimising, on the basis of the received data concerning environmental conditions and the established models for wake effects, the operation of the wind farm by selecting the set of operational set points for each of the individual wind turbines, respectively, which, according to the corresponding operational performance results in the optimal fulfilment of the optimisation criterion for the wind farm ∘ sending data to the individual wind turbines instructing them to operate at the selected sets of operational set points, and ∘ operating the individual wind turbines of the wind farm at the selected sets of operational set points. ∘ receiving data concerning environmental conditions around the wind farm ∘ optimising, on the basis of the received data concerning environmental conditions and the established models for wake effects, the operation of the wind farm by selecting the set of operational set points for each of the individual wind turbines, respectively, which, according to the corresponding operational performance results in the optimal fulfilment of the optimisation criterion for the wind farm ∘ sending data to the individual wind turbines instructing them to operate at the selected sets of operational set points, and ∘ operating the individual wind turbines of the wind farm at the selected sets of operational set points.