Abstract: Aerial vehicles may be equipped with propellers having pivotable blades that are configured to rotate when the propellers are not rotating under power. A pivotable blade may rotate about an axis of a propeller with respect to a hub until the pivotable blade is coaligned with a fixed blade. When the propeller is rotating a lifting force from the blade may cause the blade to rotate to a deployed position that is not coaligned with the fixed blade.

Abstract: Method for controlling a rotor blade adjustment device (14) of a wind turbine or water hydroelectric powerplant (1), wherein the rotor blade adjustment device (14) has a drive (20) which is connected to a rotor blade (8) which is subjected to a flow of wind or water and has the purpose of rotating the rotor blade (8) about a rotor blade axis (15) relative to a rotor hub (7) on which the rotor blade (8) is mounted so as to be rotatable about the rotor blade axis (15), and an electromagnetic brake (34) which is connected to the rotor blade (8) and has the purpose of blocking rotation of the rotor blade (8) about the rotor blade axis (15), wherein the brake (34) is actuated in order to change its activation state at a brake activation time (tB), wherein the drive (20) is actuated to change its driving state at a drive activation time (tA) which has a predetermined chronological offset (?tV) with respect to the brake activation time (tB), and wherein an electric current (IB) which flows through the brake (34) is

Abstract: A method for operating a wind turbine comprising an aerodynamic rotor with an approximately horizontal axis of rotation, an electrical generator and operating devices is disclosed, wherein the wind turbine is intended for feeding electrical energy into an electrical supply grid, and is kept in a starting state for starting the generator while the wind turbine cannot be completely put into operation, in particular the generator cannot be started.

Abstract: Turn caps for airfoils of gas turbine engines having exterior side walls, an exterior top wall extending between the exterior side walls, a first turn cap divider extending from the exterior top wall and positioned between the exterior side walls and defining a first turning feature between the first turn cap divider and the exterior side walls, the first turning feature comprising a first suction-side turn passage and a first pressure-side turn passage wherein the first turn cap divider fluidly separates the first pressure-side turn passage from the first suction-side turn passage within the turn cap, and a merging chamber is formed in the turn cap wherein fluid flows passing through the first suction side turn passage and the first pressure side turn passage are merged at the merging chamber.

Abstract: A method for detecting mechanical damage to a rotor blade of a wind turbine includes measuring vibrations of the rotor blade and generating a frequency-dependent vibration signal. A value of the signal energy over a predetermined frequency range of the vibration signal is determined at each of a number of measuring times and the respectively determined signal energy values are evaluated with respect to time in order to detect mechanical damage.

Abstract: A receptor arrangement for a wind turbine blade, the arrangement comprising a receptor component connectable to a down conductor of a lightning protection system wherein the receptor component is encapsulated by an insulating member. The invention extends to apparatus for lightning protection in a wind turbine blade including such a receptor arrangement connected to a down conductor, and also to a method of assembling lightning protection apparatus for a wind turbine blade.

Abstract: A wind turbine condition monitoring system includes a light source configured to produce an emitted light beam and a plurality of optical sensors configured to be positioned on a wind turbine to receive the emitted light beam from the light source. The optical sensors are configured to generate one or more product light beams from the emitted light beam. A detector is positioned to receive the product light beams generated from the optical sensors and is configured to measure intensity values of the product light beams for the optical sensors. A computing device is coupled to the detector and includes a processor and a memory coupled to the processor. The processor executes programmed instructions stored in the memory to determine, based on the intensity values for the product light beams for the optical sensors, at least a displacement value, a current value, and a voltage value for the wind turbine.

Abstract: The present disclosure is directed to a method for reducing loads of one or more rotor blades of a wind turbine. The method includes monitoring a load of a first rotor blade. If the load of the first rotor blade exceeds a first load threshold, the method also includes designating a rotor plane sector in which the first rotor blade is located as a high load rotor plane sector. The method further includes adjusting, via a pitch drive mechanism, a pitch angle of a second rotor blade toward a first position before the second rotor blade enters the high load rotor plane sector.

Abstract: An orthogonal power unit includes blade sections with pressure sensitive elements on either side of a foil contour, such as at the widest point. Vents are positioned rearward of the pressure sensitive elements. A controller, such as a linkage or electronic controller, senses a pressure differential between the pressure sensitive elements. When the pressure differential exceeds a threshold, a valve coupled to the vent on the low-pressure side is opened to release pressurized fluid from that vent. The fluid may be combustible gas and an ignitor may be incorporated into the turbine blade to ignite the gas. A channel may pass through the blade sections and a back-pressure valve in each valve section couples the channel to a cavity from which fluid is released through the vents.

Abstract: A fast-converging and reliable method for estimating a wind speed at, for example, a wind turbine comprising a rotor carrying a set of variable pitch angle wind turbine blades. The estimated wind speed is iteratively derived using a wind turbine rotor rotational speed, a turbine blade pitch angle, and a derived initial estimated wind speed. The initial estimated wind speed is based on the rotational speed and an initial tip speed ratio. The initial tip speed ratio is selected to be a value greater than a minimum tip speed ratio, wherein the minimum tip speed ratio defines a control region stability limit as a function of the pitch angle. Thus, for a given pitch angle, a minimum tip speed ratio is derived as a limit or boundary point between a stable control region and an unstable control region.

Abstract: A variable vane system includes a unison ring driven by a harmonic drive. A multiple of pins extend from the unison ring. A multiple of variable vanes are driven by the unison ring, each of the multiple of variable vanes connected to the unison ring through a respective drive arm with a slot that receives one of the multiple of pins to accommodate axial motion a support that extends from an engine case to support the unison ring and a multiple of rollers to support the unison ring.

Abstract: A method for controlling a wind turbine via an ultrasonic wind sensor includes: transmitting, by a first ultrasonic transceiver, an ultrasonic packet at a first time and receiving, by a second ultrasonic transceiver, the ultrasonic packet at a second time; identifying wind properties based on the first time and the second time; transmitting the identified wind properties to a programmable logic controller (PLC) interfaced with the wind sensor and a turbine controller, wherein the interface with the turbine controller includes one of a plurality of communication topologies; processing the identified wind properties for output to the turbine controller based on a specific communication topology, wherein the PLC is configured to process the identified wind properties for output based on each of the plurality of communication topologies; transmitting the processed wind properties to the turbine controller; and controlling, by the turbine controller, a wind turbine based on the wind properties.

Abstract: A balancing device for turbochargers comprises a base body having a centrally disposed receiver. A rotation element to be balanced can be axially inserted to hold the rotation element in the receiver such as to turn about its axis of rotation. A number of hydraulic cylinders are arranged around the central receiver on the base body for fixing a core assembly of the turbocharger in the central receiver. The base body is in the form of a decoupling plate having an inner plate section and a stationarily positioned outer plate section elastically connected to the inner plate section and surrounding the inner plate section. The decoupling plate has a number of peripheral slots resiliently decoupling the inner plate section from the outer plate section such that a number of separate holding sections are formed on the de-coupling plate.

Abstract: A wind turbine comprising: a rotor having a plurality of blades; and a controller. The controller is arranged to independently control each of the plurality of blades and/or one or more components of each blade in order to increase a driving moment of each blade independently of other of the blades when speed of wind acting on the wind turbine is below rated. The controller is also additionally or alternatively arranged to independently control each of the plurality of blades and/or one or more components of each blade independently of other of the blades when wind force acting on the blades is above cut-out in order to reduce a mechanical load experienced by at least a part of the wind turbine.

Abstract: A method of testing a receptor of a wind turbine includes a step of moving an unmanned aerial vehicle (UAV) close to the receptor of a wind turbine blade mounted to a hub of the wind turbine, and performing an electric continuity test on the receptor.

Abstract: A method for feeding electric energy into an electric power supply network by means of a wind turbine, wherein the wind turbine generates electric power from wind having a variable wind speed by means of an aerodynamic rotor and a generator and feeds it at least partially into the electric power supply network and/or uses it at least partially for supplying electric devices of the wind turbine, wherein the generated electric real power is set as function of an ambient temperature and/or wherein the rotor has a variable rotational speed and the rotational speed is set as a function of the ambient temperature.

Abstract: A control device for a ceiling fan may have a motor drive circuit configured to control a rotational speed of a motor of the ceiling fan, an occupancy sensing circuit, and a control circuit configured to adjust the rotational speed of the motor in response to a detected occupancy or vacancy condition. The control circuit may process the signals generated by the occupancy sensing circuit to eliminate the effects of vibrations and/or wobbling of the ceiling fan. The control circuit may control the motor drive circuit to adjust the rotational speed of the motor in response to an accelerometer to minimize the magnitude of the wobble of the ceiling fan. The control circuit may be configured to learn a preferred rotational speed for the motor. The control circuit may also be configured to control the rotational speed of the motor to affect a thermal comfort level of an occupant.

Abstract: An adjusting device for adjusting a yaw position of a nacelle of a wind turbine, comprising a circumferential holed flange provided with drilled holes, and at least one adjusting means, having a gripping portion for gripping on the holed flange, a fastening portion for fastening to an anchorage point of the wind turbine, and a linear drive for exerting a linear movement between the gripping portion and the fastening portion, wherein the holed flange is fixedly connected to the nacelle, and the anchorage point is fixedly connected to stationary part of the wind turbine, in particular a wind turbine tower, or vice versa, and the nacelle is mounted so as to be rotatable relative to this stationary part of the wind turbine, such that the holed flange and the anchorage point can also execute a rotational movement relative to each other, such that a linear movement exerted between the gripping portion and the fastening portion by the linear drive effects a rotational movement between the holed flange and the anchor

Abstract: Methods and systems for detecting rotor blade damage in a wind turbine are provided herein. A monitoring system includes a filter module and a damage determination module. The filter module is configured to determine an amplitude of a 1P frequency component of at least one operating condition of the wind turbine. The damage determination module is configured to compare the determined 1P frequency component amplitude to a threshold 1P frequency component amplitude.

Abstract: A system for generating power includes a supervisory control and data acquisition (SCADA) system that provides control commands to a plurality of turbine controllers to cause a windfarm to output power at a level within power parameters in a setpoint. Each turbine controller is installed at a corresponding wind turbine of a plurality of wind turbines in the windfarm. The system also includes a backup system comprising a programmable logic controller (PLC). The PLC receives turbine state information from the SCADA system that characterizes an operational state of each of the plurality of wind turbines in the windfarm and detects that the SCADA system is offline. The PLC also selectively provides start and stop commands to a plurality of terminal interface units (TIUs) to cause the windfarm to output power at a level within the power parameters identified in the setpoint in response to the detecting.

Abstract: The present invention relates to a signal processing device for monitoring states of wind-power turbine blades and a method thereof, the signal processing device comprising: an optical fiber sensor unit for sensing moment of rotation of three blades so as to output the moment of rotation as blade signals; a signal transformation unit for converting three blade signals into two fore-ape signals; a rotation information input unit for sensing rotation information of the blades; a rotation speed estimation unit for estimating a rotation speed of the blades on the basis of the rotation information; a state determination unit which removes rotation components from the fore-ape signals and determines whether an operation of a blade is abnormal; and an output unit for outputting the determination result.

Abstract: A method of detecting a fault mode of a sensor is provided. The sensor may be, for example, a bending moment sensor and may sense a bending moment of a blade on a wind turbine generator (WTG). The method includes comparing data output by a first sensor with reference data indicating what is expected to be output by the first sensor to produce a first comparison result and comparing data output by the first sensor with data output by a second sensor to produce a second comparison result. A determination of whether the first sensor has entered a fault mode is made based at least in part on the first and second comparison results.

Abstract: A lightning protection system can include a socket, a receptor plug, a tip receptor, and a tip receptor mount. The socket can extend at least partly through a blade wall, and can include a socket body, a first retention shoulder, and a plurality of first teeth. The receptor plug can include a plug body, a plug conductor, a second retention shoulder, and a plurality of second teeth. The first retention shoulder can engage the second retention shoulder to secure the receptor plug to the socket. The first plurality of teeth can engage the second plurality of teeth to resist rotation of the receptor plug. The tip receptor mount can include latticed bonding wings that can be secured to a wind turbine blade with bonding material. The receptor plug can be accessed to be secured to the socket via an opening in another socket that is formed into the blade wall.

Abstract: The present disclosure is directed to a system and method for reducing electrical arcs caused by lightning strikes in a rotor blade of a wind turbine. The rotor blade includes a lightning protection system with at least one lightning receptor connected to at least one conductor and a conduit assembly. The conduit assembly has one or more conduit members configured to route the conductor of the lightning protection system from a first blade location to a second blade location so as to maximize a distance between the conductor and one or more conductive rotor blade components.

Abstract: The present invention relates to a control system for thrust-limiting of wind turbines, which wind turbine comprises at least one tower, which tower carries at least one nacelle which nacelle comprises a rotating shaft, which shaft is rotated by one or more blades, which blades at pitch regulated by a pitch control system. It is the object of the present invention to reduce mechanical load and stress of a wind turbine. A further object is to reduce the maximal load on tower of a wind turbine. The thrust-limiting control system performs control of the pitch angle, which thrust-limiting control system performs regulation of the pitch angle based on at least a first input from a wind estimator and a second input from a turbulence estimator. By thrust-limiting control, reduction in the maximum mechanical load on a tower, or maybe also a nacelle, can be achieved by a relatively high percentage of the load in a way where it has only very limited influence on the power production of the wind turbine.

Abstract: A variable vane system for a gas turbine engine, comprising an actuator, a harmonic drive comprising a strain wave gearing mechanism comprising a fixed circular spline, a flex spline attached to an output shaft, and a wave generator attached to an input shaft driven by the actuator, the flex spline driven by the wave generator with respect to the circular spline, a drive gear driven by the output shaft along a first axis, and an actuator gear mounted to one of a multiple of variable vanes along a second axis transverse to the first axis, the actuator gear driven by the drive gear.

Abstract: A wind turbine blade comprising a shell and at least a first girder wherein the first girder is connected to an upper part of the shell and a lower part of the shell, and where the wind turbine blade comprises at least one reinforcing member having a first end and a second opposite end. The reinforcing member comprises a first part with the first end and a second part with the second opposite end and that a length adjustment member is arranged between the first and the second part of the reinforcing member, and being adapted for mutually positioning and fixing the first and the second part in at least two different distances from each other.

Abstract: A method of adjusting a pitch angle of a rotor blade of a rotor of a wind turbine is provided. The method comprises varying the pitch angle of the rotor blade during wind operation of the wind turbine from a starting angle to reach a limit angle (?1, ?2) at which the rotor blade and/or an operational value (P) of the wind turbine reaches a predefined threshold limit (P1/2; ?1, ?2), deriving a safe angle (?3, ?4) dependent on the limit angle (?1, ?2), operating the rotor blade at the safe angle (?3, ?4) or an angle from the safe angle (?3, ?4) away from the limit angle (?1, ?2). A pitch angle adjustment system is also provided for the same purpose.

Abstract: The present disclosure is directed to systems and methods for de-icing a rotor blade of a wind turbine. The wind turbine has a nacelle mounted atop a tower. The nacelle has a rotor with a rotatable hub having rotor blade mounted thereto. The method includes shutting down the wind turbine in response to detecting ice on the rotor blade. The method also includes positioning the wind turbine in a de-icing position, the de-icing position including at least one of yawing the nacelle of the wind turbine such that the rotor is in a down-wind location of the tower or pitching the rotor blade such that a leading edge of the rotor blade is facing the tower. Another step includes de-icing the rotor blade while the rotor is in the de-icing position.

Abstract: Aerial vehicles may be operated with discrete sets of propellers, which may be selected for a specific purpose or on a specific basis. The discrete sets of propellers may be operated separately or in tandem with one another, and at varying power levels. For example, a set of propellers may be selected to optimize the thrust, lift, maneuverability or efficiency of an aerial vehicle based on a position or other operational characteristic of the aerial vehicle, or an environmental condition encountered by the aerial vehicle. At least one of the propellers may be statically or dynamically imbalanced, such that the propeller emits a predetermined sound during operation. A balanced propeller may be specifically modified to cause the aerial vehicle to emit the predetermined sound by changing one or more parameters of the balanced propeller and causing the balanced propeller to be statically or dynamically imbalanced.

Abstract: A gas turbine engine comprises a main compressor section having a high pressure compressor with a downstream most end, and more upstream locations. A turbine section has a high pressure turbine. A first tap taps air from at least one of the more upstream locations in the main compressor section, passes the tapped air through a heat exchanger and then to a cooling compressor. The cooling compressor compresses air downstream of the heat exchanger. A second tap taps air from a location closer to the downstream most end than the location(s) of the first tap. The first and second tap mix together and are delivered into the high pressure turbine. An intercooling system for a gas turbine engine is also disclosed.

Abstract: The present invention relates to an intelligent wind turbine generator, which comprises a first blade module, a second blade module, a power generating module, and a control module. The second blade module is disposed at the first blade module. The power generating module is connected with the first and second blade modules. The control module is connected with the power generating module, the first blade module, and the second blade module. The first and second blade modules rotate, driving the power generating module to generate power. The control module detects a voltage value generated by the power generating module and judges if the voltage value is greater or lower than a predetermined value. The control module controls whether the first and second blade modules overlap or not. The intelligent wind turbine generator is able to switch automatically the blade number of the wind turbine generator.

Abstract: A method is disclosed for estimating the surface condition of a blade rotating about a rotational axis in an air or fluid stream.

Abstract: A method of controlling a wind power plant having a plurality of wind power generators includes monitoring the generation state of the wind power plant, analyzing the generation quantity reduction factor of a wind power generator if that generator has a reduced generation output quantity, and individually controlling the generation output quantity of that wind power generator based on the analyzed generation quantity reduction factor so that the generation output quantity is increased.

Abstract: The lengths and/or chords and/or pitches of wind turbine or propeller blades are individually established, so that a first blade can have a length/chord/pitch that is different at a given time to the length/chord/pitch of a second blade to optimize performance and/or to equalize stresses on the system.

Abstract: A wind turbine rotor blade, including a first blade section, a second blade section and at least one pre-stressed tensioning element for connecting the first blade section and the second blade section with each other, wherein the rotor blade is split at an interface thereof in a longitudinal direction into the first blade section and the second blade section, wherein the first blade section is arranged closer to a root of the rotor blade than the second blade section, wherein a length of the at least one pre-stressed tensioning element is larger than half of a chord length of the rotor blade at the interface and wherein the at least one pre-stressed tensioning element extends deeper into the first blade section than into the second blade section, is provided.

Abstract: A wind turbine system is presented. The wind turbine system includes a wind turbine comprising a plurality of blades and a tower, and a processing subsystem configured to shut down the wind turbine by non-linearly pitching out the plurality of blades in the wind turbine towards a feather position at a pitch rate determined based upon a tower-fore-aft velocity of a top-portion of the tower during oscillations of the tower.

Abstract: A variable vane control system for controlling the angle of rotation of a circumferential row of variable vanes of a gas turbine engine. The control system includes a mechanical linkage operable to rotate the variable vanes, one or more actuators for operating the linkage and one or more position sensors for detecting the respective actuation positions of the one or more actuators. The control system further includes a linkage position signalling switch for signalling that the mechanical linkage is at a calibration position corresponding to a predetermined rotation angle of the vanes. The control system further includes a controller for controlling the one or more actuators and thereby controlling the angle of rotation of the vanes, based on the detected actuation positions which the controller correlates with vane rotation angle.

Abstract: The invention provides a lightning protection system for a wind turbine blade (10), whose structure comprises two structural shells (11, 13) with two caps (19, 21) formed by carbon fiber laminates and two spars (15, 17). In addition to a first subsystem formed by one or more lightning receptors connected to one or two conductor cables the lightning protection system comprises a second subsystem formed by lateral lightning receptors (30, 31) arranged at the leading and trailing edges of the wind turbine blade (10) in at least two cross sections (22, 23) of it connected with the caps (19, 21) and connecting means between the two subsystems for equipotentializing the lightning protection system.

Abstract: A system, including: a linear actuator axially arranged in a first propeller and rotatably secured thereto, a first linking mechanism connecting a rod of the linear actuator to a second propeller to change a setting of blades thereof, and including an intermediate bearing between the propellers, which is capable of transmitting translation of the rod of the linear actuator and disconnecting a rotatable link to the first propeller to make it possible to change the setting of the blades of the second propeller rotated in an opposite direction to the first propeller, and a second linking mechanism combined with blades of the first propeller to change a setting thereof.

Abstract: Methods and apparatus for analyzing fatigue of a structure and optimizing a characteristic of the structure based on the fatigue analysis are disclosed herein. An example method disclosed herein includes obtaining mass and unit stress values of a plurality of details of interest of a structural component, calculating fatigue margins for each of the details of interest, identifying among the calculated fatigue margins any negative fatigue margins associated with one or more of the details of interest, and adjusting, via a processor, a dimensional characteristic of each detail of interest associated with the negative fatigue margin(s) until positive fatigue margin(s) at each detail of interest is obtained.

Abstract: A method of managing computing tasks in a wind farm is provided. The method comprises determining the status of a plurality of wind turbines in the wind farm, determining available computing resources based on the status of the plurality of wind turbines, and allocating a portion of the computing tasks to the available computing resources for processing.

Abstract: A wind turbine system is presented. The wind turbine system includes a wind turbine tower, a plurality of blades, a rotor supported by the wind turbine tower and rotatably coupled to the plurality of blades, a torque control device coupled to the rotor, and a control system programmed to predict an over-speeding time T of an occurrence of an over-speed rotor event based at least in part upon a current rotor acceleration and a current rotor speed, that cannot be compensated by an available counter-torque margin of the torque control device, and, in response, to generate pitch commands for the pitch angles of the plurality of blades to avoid the over-speed rotor event.

Abstract: An actuation assembly includes a first shaft comprising a first end disposed opposite a second end. The actuation assembly further includes a second shaft with a first end disposed opposite a second end. The first end of the second shaft is disposed within the second end of the first shaft such that the first end of the second shaft can move relative the second end of the first shaft. A fluid chamber formed between the first shaft and the second shaft at the second end of the first shaft. Magnetorheologic fluid is disposed inside the fluid chamber and a magnetic field generating coil is disposed around the second end of the first shaft and the first end of the second shaft.

Abstract: The present disclosure is directed to systems and methods for manufacturing a wind turbine rotor blade that can be easily lifted and lowered to and from a rotor installed atop a tower. The method includes providing a plurality of root inserts for a blade root of the blade and securing at least one cylindrical member to one of the root inserts such that the cylindrical member is substantially perpendicular with the root insert. The method also includes arranging the root inserts in a blade mold of the blade and forming a blade shell with the plurality of root inserts laminated therein. The method may further include securing at least one attachment component within each of the cylindrical members so as to provide an attachment location for a pulley cable used to lift and lower the rotor blade to and from the rotor installed atop the tower.

Abstract: The invention regards an apparatus for adjusting the yaw of a wind turbine adapted for mounting on a wind turbine comprising, a system for measuring the wind direction adapted, via a control signal, to control the yaw angle of the wind turbine based on the wind direction, and a wind sensor system adapted to determine the yaw error of the wind turbine, and means for modifying the control signal based on the yaw error determined by the wind sensor system.

Abstract: The present disclosure is directed to a method for controlling a wind turbine having a rotor with a plurality of rotor blades mounted thereto based on a spatial wind speed distribution. The method includes monitoring, via at least one sensor, one or more operating conditions of the wind turbine. The method also includes determining a rotor azimuth angle of the wind turbine. In addition, the method includes determining, via a physics-based model, at least one individual wind speed for one or more of the rotor blades of the wind turbine based on the one or more operating conditions and the rotor azimuth angle. The method also includes determining a spatial wind speed distribution of the wind turbine based on the at least one individual wind speed. Thus, the method further includes controlling the wind turbine based on the spatial wind speed distribution.

Abstract: The present subject matter is directed to a method for estimating rotor blade loads, e.g. a blade root resultant moment, of a wind turbine. In one embodiment, the method includes measuring, via one or more sensors, a plurality of operating parameters of the wind turbine. Another step includes estimating out-of-plane and in-plane forces acting on the rotor blade based at least partially on the plurality of operating parameters. Further, the method includes determining an application point for the out-of-plane and in-plane forces along a span of the rotor blade. A further step includes estimating out-of-plane and in-plane moments of the rotor blade based at least partially on the out-of-plane and in-plane forces and the respective application points. Thus, the method includes calculating the load acting on the rotor blade based at least partially on the out-of-plane and in-plane moments.

Abstract: The invention regards a method for controlling the pitch angle of at least one wind turbine blade in a rotor connected to a main shaft on a wind turbine, the method comprises the steps of determining; a first component of the wind vector which is upwind, horizontal and aligned with the main shaft direction and, a second component of the wind vector which is upwind, perpendicular to the first component of the wind vector, wherein the first component of the wind vector and the second component of the wind vector are determined by use of at least one ultrasonic sensor mounted on the rotor, whereby the pitch angle is controlled based on the first component of the wind vector and the second component of the wind vector.

Abstract: A method of controlling a wind turbine includes obtaining weather data indicative of one or more weather conditions at the wind turbine, estimating wake profiles based on the obtained weather data, estimating far-field sound propagation in a direction of a noise sensitive site based on the estimated wake profiles, generating a yaw signal, wherein the yaw signal controls the yaw of a nacelle relative to a tower of the wind turbine, estimating a noise level at the noise sensitive site, and adjusting the yaw signal if the estimated noise level at the noise sensitive site exceeds a threshold noise level.