Abstract: The present disclosure relates to methods for determining a maximum power setpoint for a wind turbine comprising: determining an ambient temperature, determining a temperature of one or more wind turbine components and determining a current power output of the wind turbine. The methods further comprise determining the maximum power setpoint based at least partially on a thermodynamic model of the wind turbine components, the ambient temperature, the temperature of the components of the wind turbine and on the present power output of the wind turbine. The present disclosure further relates to methods for determining a setpoint reduction and to wind turbine control systems and wind turbines configured for such methods.

Abstract: The invention relates to control of a wind turbine to address varying drivetrain loading. This is obtained by determining a modification signal to be set as a control signal. A signal indicative of a speed of the electrical generator a signal indicative of a requested output power are received. The signal indicative of a speed is filtering to isolate frequencies in a selected disturbance frequency band to generate a disturbance signal. The disturbance signal is phase shifted and combined with a requested output power to obtain the modification signal.

Abstract: A method of activating and/or deactivating a safe mode of operation of a wind turbine is provided, the method including: receiving at least one measurement signal related to a weather condition; filtering of a measuring signal dependent quantity to obtain a filtered signal, wherein the filtered signal depends on whether the measuring signal dependent quantity and/or filtered signal is increasing or decreasing with time; activating and/or deactivating the safe mode of operation based on the filtered signal.

Abstract: The system and method described herein provide grid-forming control of a power generating asset having a double-fed generator connected to a power grid. Accordingly, a stator-frequency error is determined for the generator. The components of the stator frequency error are identified as a torsional component corresponding to a drivetrain torsional vibration frequency and a stator component. Based on the stator component, a power output requirement for the generator is determined. This power output requirement is combined with the damping power command to develop a consolidated power requirement for the generator. Based on the consolidated power requirement, at least one control command for the generator is determined and an operating state of the generator is altered.

Abstract: It is described a method of operating at least one adaptable airflow regulating system (13) of at least one rotor blade (15) of a wind turbine (1) connected to a utility grid (6), the method comprising: receiving information (10) regarding a grid disturbance; adapting, in particular during a disturbance duration, the airflow regulating system (13) based on the information (10), while the wind turbine (1) stays connected to the utility grid (6).

Abstract: Wind turbine ice protection control systems and methods for controlling ice protection measures at a wind turbine are provided. The ice protection control system operates in multiple locations: the first being at least one remote wind turbine site and the second at least one offsite control office location. The ice protection control system includes sensors on at least one wind turbine at least one remote site for sensing internal and external environmental conditions and/or wind turbine outputs. The sensors output data which is received by a network at the wind turbine and then sent to a second network at an offsite location where it is analyzed to determine actions to be taken. In this way, multiple wind turbines at multiple wind turbine remote sites can be controlled by a single control system. Systems and methods for creating, retrieving, and storing sensor data within the ice protection control systems are also discussed.

Abstract: The present disclosure relates to wind turbines comprising a rotor 18 including one or more blades 20, a control module 110 configured to operate the wind turbine according to a first operational setpoint, determine an adjusted setpoint for the wind turbine at least partially based on vibrations in blades and transition to the adjusted setpoint. Further, the control module 110 is also configured to determine remaining vibrations in blades and determine a new setpoint for the wind turbine based on the remaining vibrations. The present disclosure further relates to methods for operating a wind turbine.

Abstract: A regulated power procurement segment determination unit refers to a renewable energy theoretical maximum value database and a renewable energy output database and determines segments for procurement of regulated power, a demand/supply control simulation unit refers to the renewable energy output database, a demand database, and a power generator database, performs demand/supply control simulation by using the segments for procurement of regulated power, renewable energy output data, demand data, and power generator data, and predicts, on the basis of the demand/supply control simulation results, frequency changes and procurement costs regarding the segments for procurement of regulation power, and a segment selection unit refers to a cost database and a frequency change database and selects a segment for procurement of regulation power on the basis of the frequency changes and the procurement costs regarding the segments on which prediction has been performed.

Abstract: A method of charging an energy storage system, such as a battery, a capacitor, or a super capacitor, using a wind turbine is described. The method comprises establishing if turbine power production can be increased and establishing if the energy storage system is capable of taking a charge. If both conditions are met, the power generated by the wind turbine is increased above a rated power of the wind turbine and the additional power is used to charge the energy storage systems. A method of control is also disclosed.

Abstract: Provided is a method for detecting low-frequency oscillations, in particular subsynchronous resonance, in an electrical supply grid, wherein the electrical supply grid has a grid voltage at a grid nominal frequency, comprising the steps of capturing at least one electrical signal from the electrical supply grid, and evaluating the electrical signal by means of wavelet analysis, during which a time-dependent frequency pattern is created by analyzing a correlation of the captured signal with a predetermined wavelet mother function, wherein the presence of a low-frequency oscillation is assumed if at least one further low-frequency frequency component is present in the time-dependent frequency pattern in addition to a fundamental component.

Abstract: The invention provides a method of controlling operation of a wind turbine having a tower. The method includes determining an overall control output including lateral oscillation control for dampening lateral oscillation of the tower, and using the overall control output to control wind turbine operation. The method further includes receiving lateral oscillation sensor data indicative of a level of lateral oscillation of the tower, determining a rated lateral oscillation control output in dependence on the received lateral oscillation data, and receiving an indication of yaw error of the wind turbine. A lateral oscillation control output included in the overall control output is determined to be de-rated from the rated lateral oscillation control output when the indicated yaw error is above a predetermined lower threshold level.

Abstract: A thermal power unit-flywheel energy storage cooperative frequency regulation control method and system is provided, which belongs to the technical field of a power grid. First, a real-time output increment of a thermal power unit is predicted, then a real-time frequency regulation power instruction of a flywheel energy storage system is determined based on the predicted real-time output increment of the thermal power unit, and finally the frequency regulation power instruction of the thermal power unit is determined by a difference adjustment coefficient of a governor and a grid frequency deviation. The thermal power unit and flywheel energy storage system is cooperatively controlled by frequency regulation based on the real-time output increment predicted value of the unit, which realizes self-adaptive adjustment of output of the flywheel energy storage system under dynamic working conditions, and improves the grid frequency stability and operation safety of the thermal power unit.

Abstract: A method for determining a rotor orientation of a rotor of a wind turbine, the rotor having a rotor blade, to a method for determining a geographical position of a rotor of a wind turbine, the rotor having a rotor blade, to a wind turbine and to a wind farm. A method for determining a rotor orientation of a rotor of a wind turbine, the rotor having a rotor blade, comprising the steps of: receiving at least two sets of position data of a GNSS receiver arranged in the rotor blade, the two sets of position data representing two different horizontal positions of the GNSS receiver; and ascertaining the rotor orientation of the rotor on the basis of the position data.

Abstract: An off-shore wind turbine system is assembled using a platform or jack-up vessel, and a first base anchored to the seafloor at a blade assembly off-shore location. A buoyant tower is attached to the first base. A crane provided on the platform or jack-up vessel is used to lift blades and blades, which are then coupled to a turbine held in a nacelle provided at the top of the buoyant tower. The buoyant tower, the nacelle, and the blades are detached from the first base. The buoyant tower, the nacelle, and the blades are towed to a wind farm and connected to a second base provided in the wind farm. The buoyant tower, the nacelle, and the blades are further stabilized using mooring lines spanning between the buoyant towers and other bases provided in the wind farm. The first base and/or the second base include anti-rotation features.

Abstract: A method (2000) for operating a wind turbine (100) including a rotor (106) having rotor blades (108) and a power conversion system (118, 210, 234) mechanically connected with the rotor (106), configured to convert input motive power into electrical output power, and electrically connected to a network (242) for feeding the electrical output power (P) to the network is provided. The method includes initializing (2000), at a first time (t0), the wind turbine to operate in an overproduction operating mode in which the electrical output power (P(t)) of the power conversion system is increased from an initial electrical output power of the power conversion system by providing kinetic energy stored in the rotor. At a second time (t2), decreasing (2200) the electrical output power, and integrating a reference power (Pref, P0) to determine an energy recovery value (Erec) are started.

Abstract: A wind turbine auxiliary power system configured to receive electrical power from an electrical power generating system of the wind turbine or from a power grid. The auxiliary power system includes an auxiliary transformer having a primary side configured to be coupled to the electrical power generating system of the wind turbine and a secondary side configured to be coupled to auxiliary power consumers of the wind turbine and to provide transformed electrical power to the consumers. It further includes an electronic on-load tap changer provided on the auxiliary transformer, wherein the electronic on-load tap changer includes taps on at least one transformer winding of the auxiliary transformer and semiconductor switches that are coupled to the taps and that are configured such that by controlling the semiconductor switches, the transformation ratio of the auxiliary transformer is adjustable to compensate for voltage variations on the primary side of the auxiliary transformer.

Abstract: The invention relates to a method for controlling a wind turbine system, more particular for a controlled sliding strategy to lower loads on the yaw system by controlling mechanical brakes and motor brakes in the yaw drive actuators. When the yaw system being in the non-yawing operational state, and the mechanical brake(s) being in an engaged state, and the yaw controller determines or receives a signal indicative of a yaw moment, and if the signal indicative of a yaw moment is above a signal threshold, then the yaw controller sends a braking signal to the yaw drive actuators to enter the motors into the brake state to apply a braking torque.

Abstract: Provided is a method of controlling a wind turbine or a wind park including at least one wind turbine connected to a utility grid for utility grid support, the method including: receiving a control command from a utility grid manager, and selectively controlling the wind turbine according to the control command.

Abstract: Wind turbine comprising a rotor, comprising at least a first blade, and a supporting structure for supporting said rotor up in the air; wherein said first blade is arranged to rotate in a rotor plane around a rotor axis of the rotor and wherein said first blade is rotatable by a blade pitch driving mechanism around a blade pitch axis that is substantially parallel to a longitudinal axis of the blade, wherein said rotor axis is movable in at least one of a rotational tilt direction, a rotational yaw direction and a fore-aft translational direction and wherein the wind turbine further comprises a controller for controlling the wind turbine by varying an induction factor of the first blade over time while the rotor rotates around its rotor axis, wherein the controller is further arranged for varying said induction factor of the first blade by controlling the blade pitch driving mechanism for applying an oscillatory blade pitch rotation to the first blade, and by inducing an oscillatory motion of the rotor axis i

Abstract: Provided is a method of controlling at least one wind turbine having a wind turbine tower and being connected to a utility grid, the method including: dynamically filtering a utility grid active power in dependence of a damping signal provided for counteracting an oscillation of the wind turbine tower; and controlling the wind turbine in dependence of the filtered utility grid active power.

Abstract: A propulsion system for a device includes an electric motor configured to generate torque to propel the device. A controller is in communication with the electric motor and is adapted to select at least one harmonic order for a harmonic current command. The controller is adapted to define a plurality of operating regions, including a first operating region, a second operating region and a third operating region, each associated with a respective objective function for generating the harmonic current command. The controller is adapted to operate the harmonic current command with four degrees of freedom by selectively varying a q-axis current magnitude, a d-axis current magnitude, a q-axis phase and a d-axis phase as a function of the torque and a motor speed.

Abstract: This disclosure is directed to a method for operating a wind turbine which includes a speed-variable drive system. The system includes an electrical machine and a pulsewidth modulation-controlled converter. The speed-variable drive system is connected to an electrical grid. In the event of a transient grid fault, a frequency of the pulsewidth modulation is determined in response to a current in an electrical circuit connected to the converter.

Abstract: A method of repositioning a floating offshore wind turbine located at a current offshore position and having rotor blades rotating in a rotor blade plane includes: measuring a first value of a variability of a load related to a first location at the wind turbine; measuring a second value of a variability of a load related to a second location at the wind turbine; comparing the first value with the second value; and moving the wind turbine along a direction depending on the comparison and in particular further depending on the first location relative to the second location.

Abstract: The present disclosure provides a method and device for simulating a dynamic digital twin model of dominant operation of a wind turbine generator assembly, by which conventional operational parameters of the wind turbine generator assembly that are acquired in real time are preprocessed to obtain steady-state operational parameters of the wind turbine generator assembly. A pneumatic subsystem-related data black box model, a transmission subsystem model, a tower subsystem model, and an electrical subsystem model are simulated individually using the steady-state operational parameters, and then combined to form a dynamic dominant-operation simulation model for simulating an operation process of the wind turbine generator assembly. Meanwhile, a dynamic deviation compensation model is constructed on the basis of the dynamic dominant-operation simulation model.

Abstract: A system may include at least one temperature control coil secured to a body of a vehicle in a position proximate a smart display sheet. The temperature control coil is configured to heat and/or cool the smart display sheet to maintain a temperature of the smart display sheet within an operating temperature range. Further, the system may include a control system configured to output instructions to control the temperature control coil.

Abstract: Provided is a method of controlling at least one converter of at least one wind turbine connectable to a wind park grid of a wind park during black start or island mode of the wind park, the method including: ramping up a converter voltage reference unless a power related condition and/or a wind park grid frequency related condition or a converter current related condition is violated.

Abstract: A wind farm, and a method for controlling high voltage ride through, a system, a MMC and a machine-side converter therefor are provided. The method for controlling high voltage ride through control method for the wind farm includes: determining an amplitude of a voltage of a power grid; determining that a high voltage ride through event is occurred under a condition that the amplitude of the voltage of the power grid exceeds a first threshold; acquiring a fundamental frequency modulation wave of the MMC; superimposing a triple harmonic on the fundamental frequency modulation wave to obtain a superimposed modulation wave; and controlling the MMC to operate basing on the superimposed modulation wave.

Abstract: A feedforward control method includes: acquiring, by means of a remote sensing measurement apparatus, inflowing wind information of a plurality of spatial point positions in front of a wind turbine, wherein the plurality of spatial points are distributed in a plurality of different cross sections, and the distances between the plurality of different cross sections and the wind turbine are different; combining the acquired inflowing wind information into a target wind velocity; predicting, on the basis of the combined target wind velocity, incoming flow arrival time required for inflowing wind at a target point to arrive at an impeller plane; and performing feedforward control on the wind turbine according to the predicted incoming flow arrival time.

Abstract: A wind turbine generator system and a rotation speed avoidance control method therefor. The method comprises: according to statistical information of the rotation speed of a generator being in a rotation speed avoidance interval, identifying whether a wind turbine generator system repeatedly falls within the rotation speed avoidance interval; and when it is determined that the wind turbine generator system repeatedly falls within the rotation speed avoidance interval, adjusting a rotation speed avoidance control parameter of the wind turbine generator system according to the statistical information of the rotation speed being in the rotation speed avoidance interval. Correspondingly, further provided is a rotation speed avoidance control apparatus for a wind turbine generator system.

Abstract: A method for measuring the vibration behaviour of a drivetrain of a turboset including a generator in a power plant connected to a power network, includes: a) selecting exciter signals, wherein the frequency spectrum extends significantly beyond the frequency range usual from the commissioning of pendulum damping devices, b) influencing the field current of the generator using the exciter signals such that mechanical vibrations are excited in the power plant turboset, c) measuring the excited mechanical vibrations including the resonance vibrations by measuring at least one suitable output variable, d) determining a transfer function from the exciter signal to the output variable measured, and e) determining the transfer function from the generator torque at a desired output variable using known transfer functions of the exciter signal at a desired input variable and/or of the desired output variable for the output variable measured on the basis of the transfer function determined.

Abstract: Electric power supply apparatus in an industrial plant (20) for treating materials, wherein the plant (20) comprises one or more lines (11, 21) for treating the materials and one or more user devices (17, 18, 19) powered with alternating current by power supply means (13) comprising at least one transformer (14) connected to a mains power network (15) and a power supply system (16) located downstream of the transformer (14).

Abstract: The present disclosure relates to methods (300) to determine a duration of a period for warming up of a power converter (20) of a wind turbine (1). The method (300) comprises determining (301) a first indicator that is indicative of a time that the power converter (20) has been inactive. Further, the method (300) comprises determining (302) the period for warming up at least partially based on the first indicator. A power converter assembly is also disclosed.

Abstract: A wind turbine and operating method include a double-fed induction generator with a generator rotor and a generator stator, a power conversion assembly having respective rotor-side and line-side power converters, and a load. The generator rotor is coupled to the rotor-side power converter. The line-side power converter and the load are coupled to a grid via a low voltage winding of a transformer. A first sum of a rated current of the generator rotor and a rated current of the load is more than an upper current limit of the low voltage winding. When operating the generator at a sub-synchronous speed, a first current is provided to the generator rotor that is less than a normal generator rotor current, and a second current is provide to the load, wherein a second sum of the first current and the second current is equal to or less than the upper current limit of the low voltage winding.

Abstract: The yaw control system may obtain time series data of a wind turbine generator set in response to a strategy adjustment request, the time series data of the wind turbine generator set comprising time series data for a wind facing angle; determine a generator set operating duration corresponding to each wind facing angle according to the time series data of the wind facing angle; determine a data distribution characteristic of the generator set operating duration corresponding to the wind facing angle according to generator set operating durations corresponding to multiple wind facing angles; and when identifying that the data distribution characteristic of the generator set operating duration corresponding to the wind facing angle meets a corresponding strategy adjustment condition, adjust a yaw control strategy, to perform yaw control on the wind turbine generator set according to an adjusted yaw control strategy.

Abstract: Systems and methods for managing reactive power during low voltage ride through are provided. Responsive to detecting a fault on a power grid, a controller may identify a power regulation mode of the generator system. The controller can switch the power regulation mode to an offset power regulation mode of the generator system responsive to identifying the power regulation mode. The controller may adjust a value of a parameter of the generator system from a normal value to an offset value, wherein the parameter is selected based on the offset power regulation mode. The controller can maintain the value of the parameter as the offset value for a period of time. After the period of time, the controller can modify the value of the parameter from the offset value to the normal value, and the power regulation mode from the offset power regulation mode to the identified power regulation mode.

Abstract: A source-grid-load-storage networked collaborative frequency control method is disclosed, which comprises acquiring total active power ?P to be regulated during a secondary frequency regulation process of a power grid; performing frequency regulation by source-grid-load-storage of the power distribution system, allocating power regulation capacities, and determining whether the desired total active power is met after the frequency regulation; if the desired total active power is met, determining whether power of power generation units is out of limit; if the power of the power generation units is not out of limit, keeping active power of the power distribution system in balance to complete frequency regulation of the power grid; if the power of the power generation units is out of limit, correcting the power regulation capacities of the power generation units of the source-grid-load-storage and compensating a power difference to keep the active power of the power distribution system in balance.

Abstract: Provided is a method, computing system, and computer program product for reducing floating wind turbine loads induced by ocean waves by adjusting a blade pitch angle of at least one rotor blade of a floating wind turbine to minimize a moment imbalance at a platform top of the floating wind turbine caused by ocean wave activity.

Abstract: A modular charging and power system for generating and supplying electrical power to electric vehicles, hybrid electric vehicles, other manned and unmanned remotely operated vehicles, drones, robotics, marine and aerospace vehicles, equipment, or apparatus, portable power units, propulsion systems, and other electrically powered systems. The modular charging and power system comprises a racking system for retaining one or more interchangeable power modules. Each power module comprises a generator driven by a power unit, a compressor to deliver high-pressure driving fluid to the power unit, and a battery bank. Electrical power generated by the generator powers the compressor, the battery bank, and/or an external electronic device or system.

Abstract: The invention relates to a two-way electrical power distribution network including: a high electrical power distribution bus; medium voltage electrical power feed lines; low voltage distribution lines, wherein the low voltage distribution lines are connected to load(s) and/or source(s); and, medium voltage electrical power regulating apparatus including: a DC contactor having DC terminals; a transmission network connector connected to the medium voltage electrical power feed line including: live terminal(s) connected to live connection(s) and a neutral terminal connected to a neutral of the medium voltage electrical power feed line; switches connected to the DC contactor; and electronic controlling devices coupled to the switches and control the switches to independently regulate electrical power on each of the live connection and the neutral connection of the medium voltage electrical power feed line to thereby maintain a voltage in the electrical power distribution bus during different load and source condi

Abstract: Controlling a current injected to a power grid from a renewable power plant, in response to a voltage event in the power grid. At least a current at a point of common coupling between the renewable power plant and the power grid is determined and provided to a power plant controller (PPC). The PPC derives individual current setpoint corrections for at least some wind turbines, based on the determined current, and dispatches each derived current setpoint correction to wind turbine controllers of the corresponding wind turbines. The wind turbine controllers control a current output of the respective wind turbines, based on measurements of current and/or voltage at a point of connection between the wind turbine and an internal grid of the renewable power plant, and by taking into account the dispatched current setpoint correction.

Abstract: Provided are a method for operating a wind turbine, wherein the wind turbine has an aerodynamic rotor with at least one rotor blade which is mounted on a rotor hub of the rotor, wherein a blade angle of the at least one rotor blade can be adjusted about its longitudinal axis with respect to the rotor hub, and a corresponding wind turbine.

Abstract: 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.

Abstract: A semi-submersible wind power platform includes a tower and a plurality of arms for stabilizing the tower, each arm having a float experiencing an anchoring force. Each arm consists of two elongated elements forming with part of the tower a triangle, and at least one of the elongated elements includes a catenary element.

Abstract: A method for retrieving operational data from a wind farm via one or more data hubs is disclosed. Operational data is collected from at least one of the wind turbines of the wind farm at a first data hub at the wind farm. The first data hub initiates transfer of the collected operational data towards a data recipient arranged outside the wind farm, and the operational data is received at the data recipient. The first data hub adds transfer information to the operational data, prior to transferring the operational data towards the data recipient. The added transfer information is transferred along with the operational data, the data recipient thereby receiving the transfer information along with the operational data, thereby enabling the data recipient to back trace a transfer history of the received operational data.

Abstract: A method for controlling one or more renewable power generators forming a renewable power plant, and a controller configured to perform the method. In one aspect, plant voltage control is carried out on the basis of a more accurate voltage-reactive power relationship value which is determined dynamically based on grid conditions rather than the conventional approach of the voltage-reactive power relationship being a static value that is based on information provided by a transmission system operator during installation or commissioning of the power plant.

Abstract: The present invention relates to a multirotor wind turbine comprising at least two rotor nacelle assemblies mounted to a support arrangement via respective yawing systems, and a toe angle control system for controlling the toe angles of the rotor nacelle assemblies with respect to the support arrangement; wherein the toe angle control system is configured to operate in a first mode in which the rotor nacelle assemblies are held at positive toe angles while the wind turbine is generating power in a main production mode; wherein the toe angle control system is further configured to monitor the operating mode of the wind turbine, and to switch to a second mode in which the yawing systems of the rotor nacelle assemblies are operated to reduce the toe angles of the rotor nacelle assemblies if an operating mode-based trigger condition has been met.

Abstract: A locking system for a rotatable mounted unit of a wind turbine is provided, including at least one lock adapted to lock and unlock the rotatable mounted unit, wherein the locking system includes first and second devices to prevent rotation, wherein the lock is prevented from changing from the locked state if at least one of the devices to prevent rotation is in a secure state, wherein a control unit is adapted to generate a control command changing the first device to prevent rotation into the secure state if the lock currently locks the rotatable mounted unit, wherein the locking system automatically changes the second device to prevent rotation into the secure state if an access condition is fulfilled, wherein the access condition is fulfilled if a recorded access information indicates that a room with the rotatable mounted unit is currently accessed or going to be accessed.

Abstract: A system and method are provided for reducing vibrations and loads in one or more rotor blades of a wind turbine when the rotor hub is locked against rotation, The method detects that the rotor blades are vibrating above a threshold limit, and determines one or more wind parameters for wind impacting the rotor blades. An initial orientation of the blades is also determined. Based on the wind parameters and initial blade orientation, a first angle of attack for the rotor blades is determined that will reduce the vibrations in the rotor blades. The method then determines if expected loads induced at one or more wind turbine components will exceed a threshold limit at the first angle of attack for the rotor blades. The first angle of attack is modified when the expected loads exceed the threshold limit to reduce the expected loads to below the threshold limit. A controller pitches the rotor blades to achieve the first angle of attack.

Abstract: 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.

Abstract: The present invention relates to controlling a wind turbine with a scaled power coefficient where the scaled power coefficient is determined in an adjustment process. In particular is disclosed control of a wind turbine in a partial load operation mode based on a tip-speed ratio (TSR) tracking scheme which based on an estimated wind speed determines a power setpoint. The disclosed adjustment process comprises setting a scaled power coefficient as a predetermined power coefficient multiplied by a scaling factor; adding a time-varying perturbation signal to the power setpoint; determining a transfer function from the perturbation signal to a power error; evaluate the frequency response of the transfer function over a time period to determine the scaling factor which minimizes the gain of the transfer function; and setting the operating power coefficient as the scaled power coefficient.