The present invention is a wind farm control method, wherein a reinforcement learning method (RL) is implemented in a decentralized manner (for each wind turbine). The reward (REC) is calculated according to a wake propagation delay (DEL). Thus, the reward is truly representative of the effect of the last action (previous yaw control for example).

A method for operating a first wind turbine and a second wind turbine, the second wind turbine being located in the wake of the first wind turbine. A prediction model is fed with a current wind value of the first wind turbine, in order to predict a future time point at which the area swept by the rotor of the second wind turbine becomes partially overlapped by the wake of the first wind turbine. The second wind turbine reacts to the prediction in that a control signal is generated in order to alter the pitch angle of a rotor blade of the second wind turbine relative to the pitch angle of another rotor blade of the second wind turbine. The invention additionally relates to a control system suitable for executing the method. Implementation of the disclosed method by a control system can reduce the loading of the second wind turbine.

A method of controlling plural wind turbines is provided, wherein each wind turbine is operable in different operating modes, wherein operating parameters and/or operating features are set differently in the different operating modes. For at least a first of the plural wind turbines, at least some of the different operating modes have a different impact on a residual lifetime of at least a second of the plural wind turbines. In embodiments, the method includes providing at least one candidate operating scheme and estimating a residual lifetime and/or at least one optimization parameter. Estimating of the residual lifetime and/or the optimization parameter considers the impact of the operating mode of the first wind turbine specified in the candidate operating scheme on the residual lifetime of the second wind turbine. The plural wind turbines are then operated in accordance with an operating scheme selected from the candidate operating schemes.

A method of operating a wind turbine for controlling wake wherein the wind turbine includes at least a rotor blade and a plurality of aerodynamic devices for influencing the airflow flowing on the rotor blade, the aerodynamic device being movable between at least a respective first configuration and a second respective configuration, the method including the step of moving the aerodynamic device between the first configuration and the second configuration for influencing a wake generated by the wind turbine.

A method for controlling at least one considered wind turbine in a wind park, including: determining, based on a wind condition, in particular wind direction, whether another wind turbine is in a wake region caused by the considered wind turbine; if another wind turbine is the closest wind turbine in the wake region and if the other wind turbine is in an operable state, applying a first control setting to the considered wind turbine; if the other wind turbine is in a non-operable state applying a second control setting to the considered wind turbine, wherein the first control setting is based on wind park level optimisation and the second control setting is based on wind turbine level optimisation is provided.

A wind farm/park having a plurality of spatially distributed wind turbines, including at least one upstream wind turbine and at least one downstream wind turbine. Each wind turbine includes a rotor with at least two blades. At least one downstream wind turbine is affected under certain wind conditions by a wake region generated by the upstream wind turbine and containing helical vortex structures formed at the tip of the blades of the upstream wind turbine. A geometry or configuration of one or more of the rotor blades of the upstream wind turbine is different from a geometry or configuration of the other blade(s) of the upstream wind turbine thereby creating a fixed asymmetry in the blade configuration so as to accelerate destruction of vortices in the wake of the rotor of the upstream wind turbine by exciting a natural instability of the blade tip vortices.

A method for operating a wind turbine for generating a settable turbine power, where the wind turbine includes a rotor having rotor blades adjustable in their blade angle, is operable at a settable rotor speed, and is installed at an installation site at a distance to an obstacle, comprises the obstacle causing a wind disturbance, which, in dependence on current wind direction and wind velocity, can reach the wind turbine as a wind wake, and the wind turbine reducing its turbine operation by throttling down for protection against loads due to the wind wake, wherein the throttling down is controlled in dependence on the current wind direction and the current wind velocity, wherein a weather prediction is used in order to take into consideration at least one further weather property in addition to the wind direction and wind velocity, and wherein the throttling down is additionally controlled in dependence on the weather prediction, in particular on the further weather property.

System, methods, and computer readable medium are disclosed for altering orientation of fluid turbines within a cluster. Altering orientation of fluid turbines within a cluster includes a first turbine assuming a first orientation relative to a direction of fluid flow; a second turbine in proximity to the first turbine, and assuming a second orientation relative to the first orientation, wherein the first and/or second orientations are adjustable to mitigate interference with downstream turbine operation; a processor for receiving an indication that the first turbine imposes interference on the second turbine; based on the indication, determine a third orientation enabling the first and second turbines to produce greater aggregate electrical energy than would be produced with the first turbine in the first orientation and the second turbine in the second orientation; and transmit a signal for changing one of the first and second orientations to the third orientation.

A cooperative operation optimization control method for wind turbine groups, including: dividing wind turbine groups based on a digital model and an improved Jensen wake model; performing multi-degree-of-freedom controller design on wind turbines; calculating an ultimate load of the wind turbines jointly by using two methods, and constructing a safe load constraint and a yaw angle constraint for wind turbine operation in conjunction with a safe load coefficient; establishing a collaborative optimization problem model of the wind turbine groups by taking the maximum generating power of the wind turbine groups as an optimization objective, a yaw angle of an upstream wind turbine as a decision variable, and the safe load constraint, the yaw angle constraint and a power change range of the upstream wind turbine as constraint conditions; and determining a cooperative operation optimization algorithm for the wind turbine groups, and optimizing the yaw angle of the wind turbines.

A wind turbine support system configured to support an off-shore wind turbine, an offshore wind turbine farm and a method for controlling a floating offshore wind park with such turbine support system are described. The wind turbine support system includes: a floating body configured to hold a lower end of a tower of the wind turbine; and a single point mooring system. The single point mooring system includes a seabed anchor; and a mooring line configured to be connected to the seabed anchor at a first end thereof. The floating body has a bow and a stern, and the bow is configured to be connected to a second end of the mooring line.