A system and method operate a wind farm having a plurality of wind turbines, and include determining a wind direction of a wind affecting the wind farm. Based on the wind direction, at least one upwind turbine is identified that produces a wake effect on one or more downwind wind turbines, the upwind wind turbine and affected downwind wind turbines defining a cluster. Based on a current yaw position of the upwind turbine and the wind direction, a yaw steer is determined for the upwind turbine to reduce the wake effect on the downstream wind turbines in the cluster. The yaw steer is based on increasing a net energy gain from the cluster, the net energy gain determined by subtracting an energy cost of the yaw steer from an increased energy production of the cluster resulting from the yaw steer. The upwind wind turbine is controlled to change yaw position in accordance with the yaw steer when the net energy gain satisfies a minimum threshold level.

A method for commanding an upstream wind turbine in a wind farm having a plurality of spatially distributed wind turbines and a method for controlling the upstream wind turbine in the wind farm.

Systems, methods, and computer readable medium are disclosed for coordinating rotation of adjacent turbines. Coordinating rotation of adjacent turbines includes receiving first rotational orientation information from a first turbine having a first open concave surface and corresponding convex surface; receiving second rotational orientation information from a second turbine having a second open concave surface and corresponding convex surface; receiving fluid flow direction information relative to the first and second turbines; calculating a rotational speed adjustment to cause, at instantaneous times, the first and second open concave and corresponding convex surfaces to be simultaneously transverse to the direction of fluid flow; outputting a control signal embodying the rotational speed adjustment to thereby regulate rotation of the first and/or second turbines such that at the instantaneous times, the first and second open concave and corresponding convex surfaces are transverse to the direction of fluid flow.

A method of controlling wake in a floating wind park is provided. The method includes monitoring a wind condition at at least one of the plurality of floating wind turbines to generate at least a first monitored wind condition, monitoring one or more parameters indicative of a position and/or orientation of at least one of the plurality of floating wind turbines to generate at least a first monitored floating motion state and generating a control parameter based on a parameter set comprising at least the first monitored wind condition and the first monitored floating motion state. The control parameter is derived so as to reduce the wake influence on the downstream wind turbine. The method further includes controlling based on the control parameter, an operation of at least one of the plurality of floating wind turbines.

A method of controlling diffusion of a wake generated by a horizontal axis wind turbine is provided. The wind turbine comprises a rotor having a hub and a plurality of rotor blades 20 mounted to the hub. Each rotor blade 20 has a radially-outer, energy-extraction portion 32 and a radially-inner, ventilation portion 30, wherein the radially-inner ventilation portion 30 is shaped to, in use, extract reduced levels of kinetic energy from the wind compared to the radially-outer energy extraction portion 32 in order to ventilate a central area 34 of the wake. Diffusion of the wake is controlled by adjusting the tip speed ratio of the rotor in order to modify turbulent mixing within the wake.

The invention relates to controlling a wind turbine that has a predefined wake control strategy for controlling it to perform wake control actions as a function of wind direction, and for adjusting its generated wake at wind directions predicted to result in wake loss at a further, downstream wind turbine. The invention includes receiving, from the further wind turbine, a wind direction determined to result in a defined wake condition at the further wind turbine, and determining a difference between a wind direction predicted to result in the defined wake condition at the further wind turbine and the received wind direction determined to result in the defined wake condition. The invention includes determining an adjusted wake control strategy that is for controlling the wind turbine to perform the wake control actions of the predefined strategy as a function of wind direction offset by the determined difference.

The invention relates to controlling a wind turbine that generates wake during operation. The wind turbine is part of a wind park comprising a plurality of wind turbines. The invention includes receiving, from a further wind turbine of the plurality of wind turbines that is downstream of the wind turbine, a severity parameter indicative of a severity of wake loss experienced at the further wind turbine. The invention includes determining, based on the received severity parameter, one or more wake loss control actions for adjusting wake generated by the wind turbine. The invention includes controlling the wind turbine to operate in accordance with the determined one or more wake loss control actions.

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.

An offshore wind power plant designed to reduce a fatigue load of a wind turbine includes an offshore structure, a plurality of wind turbines which is installed above the offshore structure to be spaced apart from each other with a predetermined distance and is supplied with a power through wind to produce electrical energy; and a turbine controller which controls at least one of a pitch movement and a yaw movement for the plurality of wind turbines.