Abstract: The present invention relates to a system and a method for optimal yaw control of a wind turbine, comprising a tower carrying a rotatable nacelle rotated by a yaw motor, which nacelle comprises at least one generator connected by a shaft to a rotor, comprising one or more wings, which nacelle further comprises means for detecting wind direction and wind velocity, which system performs measurement and storing data related to power production, wind velocity and wind direction. The object of this invention is to optimize the yaw position of a nacelle to the wind direction. The object can be fulfilled by power production measured in a positive direction to actual yaw position is accumulated in a first storages related to measured wind direction and that power production measured in a negative direction to actual yaw position is accumulated in a second storages related to measured wind direction. By this system the power production of the wind turbine is optimized by self-calibrating yaw control.

Abstract: A yaw auto-calibration method configured to calibrate an anemometer of a yaw control system to correct for yaw misalignment, includes collecting wind speed and wind direction data from the anemometer over a plurality of time periods. The method includes determining from the collected data a wind direction compensation signal associated with a plurality of wind speed ranges. The step of determining a wind direction compensation signal includes determining from a plotted performance value, a maximum performance value for each wind speed range and the step of determining further includes correlating the maximum performance value for each wind speed range with the associated average generator speed and plotting the maximum performance wind direction against average generator speed for each wind speed range. The maximum performance wind direction associated with the average generator speed for each wind speed range constitutes the wind direction compensation signal for the wind speed range.

Abstract: A power generation system (100, 200, 300, 400) is presented. The power generation system includes a prime mover (102), a doubly-fed induction generator (DFIG) (104) having a rotor winding (126) and a stator winding (122), a rotor-side converter (106), a line-side converter (108), and a secondary power source (110, 401) electrically coupled to a DC-link (128). Additionally, the power generation system includes a control sub-system (112, 212, 312) having a controller, and a plurality of switching elements (130, and 132 or 201). The controller is configured to selectively control switching of one or more switching elements (130, and 132 or 201) based on a value of an operating parameter corresponding to at least one of the prime mover, the DFIG, or the secondary power source to connect the rotor-side converter in parallel to the line-side converter to increase an electrical power production by the power generation system.

Abstract: According to some embodiments, a plurality of monitoring nodes each generate a series of current monitoring node values over time that represent a current operation of a wind turbine. An abnormality detection computer platform may receive the series of current monitoring node values and generate a set of current feature vectors. The abnormality detection computer platform may also access an abnormality detection model having a plurality of decision boundaries created using wind information (e.g., wind speed and/or acceleration) along with at least one of a set of normal feature vectors and a set of abnormal feature vectors. The abnormality detection computer platform may then select one of the decision boundaries based on current wind information associated with the wind turbine and execute the abnormality detection model and transmit an abnormality alert signal based on the set of current feature vectors and the selected decision boundary.

Abstract: The present invention is a method for predicting the wind speed in the rotor plane (PR) of a wind turbine (1), by accounting for an induction factor used in a wind evolution model implemented by a Kalman filter. The invention also is a method for controlling a wind turbine (1), a computer program product, a LiDAR sensor (2) and a wind turbine (1), which uses the wind prediction determined with the method according to the invention.

Abstract: The present disclosure is directed to systems and methods for automatically calibrating a load sensor system of a wind turbine and determining health of same. In one embodiment, the method includes receiving a plurality of sensor signals generated by the plurality of load sensors from the load sensor system. The method also includes determining, via a computer model, a load estimation of the wind turbine based on the sensor signals, turbine geometry, and one or more additional input parameters (e.g. rotor azimuth angle, pitch angle, rotor position, etc.). Another step includes comparing the load estimation to a load measurement to determine one or more correlation coefficients. Thus, the method also includes calibrating the plurality of sensors in the load sensor system based on the correlation coefficients.

Abstract: An oscillation damper may comprise a suspension having a suspension length. The oscillation damper may comprise a pendulum which may be suspended by the suspension and may have a pendulum mass. The pendulum may comprise a fixed part which may have a side face. The pendulum may comprise a slideable part for collision with a movement limiter. The slideable part may be a substantial portion of the pendulum mass. The slideable part may comprise one or more stacked plates which may be positioned on the fixed part, and the one or more plates may extend beyond the side face. The oscillation damper may comprise a movement limiter. The movement limiter may face the pendulum.

Abstract: Wind turbine comprising a plurality of converters, which are dynamically switched between at least a first standby state, a second running state, and a third state with an active direct current link. Converters are switched from the first standby state to the third state when a required reactive power is higher than a reactive power capability of converters on the second running state and when a voltage transient occurs.

Abstract: A wind turbine includes a wind direction sensor, a yawing system, and a control system for yawing the wind turbine rotor relative to the wind. The control system measures a wind direction parameter by the wind direction sensor Over time a group of data sets is obtained and a wind direction offset is determined from the group of data sets which is used to adjust the wind direction parameter. The adjusted wind direction parameter is then used in the controlling of the wind turbine.

Abstract: A method determines a generator system load and/or rotor angle. The generator system has a generator with a generator terminal outputting electrical power generated by the generator, a transformer and a point of common coupling, PCC, terminal. The transformer is between the generator and PCC terminals. The method includes: determining the generator field current; determining the output voltage, the output current and the power factor and/or angle of the output voltage and output current from the generator terminal, and determining the load angle of the generator system, output voltage from the generator terminal, output current from the generator terminal and the power factor and/or angle; and/or determining the output voltage, the output current and the power factor and/or angle of the output voltage and output current, and determining the rotor angle of the generator system, output voltage, output current from the PCC terminal and the power factor and/or angle.

Abstract: A method for controlling a generating unit that feeds into an electrical supply system. The generating unit feeds into the electrical supply system using one or more converters or inverters. The method is provided for the purpose of detecting a system separation or formation of a separate system, and the method includes controlling the feed by a feed controller operating with at least one current controller, detecting at least one current control error and testing the detected current control error for a disparity from a predetermined reference range. The method includes identifying a system separation involving a separate system that is disconnected from the electrical supply system and to which the generating unit is connected if a disparity from the predetermined reference range has been detected.

Abstract: Disclosed is a dynamic matching method for improving wind power generation efficiency at medium and low wind speeds.

Abstract: A wind turbine is provided. The turbine includes a support having an axis of rotation, a generator, a plurality of blades rotatably mounted on the support about the axis of rotation, the blades being moveable between a retracted position generally parallel with the axis of rotation and a fully deployed position generally perpendicular with the axis of rotation, the blades being connected to the generator such that rotation of the blades in a direction induced by wind causes the generator to produce electricity, and the provision of electricity to the generator rotates the blades, and a controller connected to the generator and configured to deliver a flow of current to the generator that is sufficient to move the blades from the retracted position toward the fully deployed position and insufficient to move the blades all the way to the fully deployed position.

Abstract: Systems and methods for managing or controlling resonance in wind turbine power systems are provided. In particular, a method for controlling a power system that includes a central master controller and one or more wind turbines electrically connected to a power grid through a point of interconnection can be provided, where each wind turbine includes a voltage regulator. The method can include receiving, by the controller, a signal from a sensor associated with wind turbines and determining, which wind turbines are operating in conditions indicative of a resonance condition in the wind turbine electrical power system based, at least in part, on the sensor signals. The method can also include generating one or more control signals based, at least in part, on a power requirement at the point of intersection and controlling an operational state of each of the voltage regulators based on the control signals.

Abstract: Methods of operating a variable speed wind turbine in an event of a power set-point limitation are described. The methods may comprise determining whether the power set-point is below or equal to a theoretical capability of the wind turbine in accordance with prevailing wind conditions. If the power set-point is below the theoretical capability, operating the wind turbine to generate power according to the power set-point, including operating the wind turbine according to a generator torque and a generator rotor speed predefined for the power set-point. Each power set-point is defined by a combination of a generator rotor speed and a generator torque, the generator rotor speed (?min, ?1, ?2, ?max) being outside an exclusion band.

Abstract: An electrical power generator includes a first part having an elongated shape, a first end and a second end. The first part is arranged for attachment to a base in correspondence with the first end and configured to be located in a fluid and configured such that, when said fluid moves, the first part generates vortices in said fluid so that a lift force is generated on the first part, which produces an oscillating movement of the first part. In addition, the generator includes a subsystem configured for converting the oscillating movement of the first part into electrical energy. The subsystem is at least partially housed within the first part.

Abstract: A method for generating underground energy using water from a water mass above an underground recipient is disclosed. The method comprises two modes; namely a 5 hydroelectric mode and a thermal mode, and steps for switching between the modes.

Abstract: A wind turbine control unit comprising a control module configured to control an actuator system by outputting a first control signal, wherein the first control signal includes a current control sample value and a predicted control trajectory; the control unit further comprising an upsampling module configured to receive the first control signal from the control module, and to output a second control signal for controlling the actuator system, the second control signal having a higher frequency that the first control signal. The upsampling module calculates the second control signal in dependence on the current control sample value and the predicted control trajectory. The embodiments provide a more accurately reproduced control signal at a higher frequency that is suitable for onward processing which does not suffer from the problems of aliasing and delay that exist with conventional upsampling techniques.

Abstract: This naval platform (14) supporting a wind turbine (12) for offshore electrical energy production comprises a main support column (24) of said wind turbine (12), and two secondary columns (26); each column including at least one shell having an outer surface delimiting an outer volume; the main column (24) being coupled to the two secondary columns (26). The outer volume delimited by the shell (28A) of the main column (24) is greater than the respective outer volumes delimited by an outer surface of the shell (28B, 28C) of each secondary column (26).

Abstract: Damage to a driving device or a ring gear or both due to an excessive force at a meshing portion therebetween is effectively prevented. In the embodiment described above, a driving device includes a driving device body that is provided in one structure at a movable section of a wind turbine and has a drive gear meshing with a ring gear provided in the other structure at the movable section, and an abnormality detection unit that monitors a force generated between the ring gear and the drive gear or the state of the driving device body or monitors both of the face and the state. Output from the drive gear of the driving device body to the ring gear is stopped when the abnormality detection unit detected an abnormality.

Abstract: A variable pitch bladed disc including a plurality of blades, each being of variable pitch about a blade axis of rotation and having a root, the plurality of blades including at least one first blade and at least one second blade, a plurality of rotor connecting shafts, each shaft having a root and a tip, the root of each blade being mounted on the tip of a corresponding rotor connecting shaft via a pivot so as to allow each blade to be rotated about the blade axis of rotation, the first blade having a first rotation axis inclination such that the rotation axis thereof is inclined in a fixed manner with respect to a radial axis passing through the root of the corresponding shaft, and the second blade has a second rotation axis inclination different from the first rotation axis inclination.

Abstract: A method for detecting when a rotor blade of a wind turbine is stuck is described. The method can include monitoring, via a controller, a speed of rotation of the wind turbine, and, determining, via the controller, a running average of the speed of rotation. The method further includes applying, via the controller, at least one filtering operation to the running average to obtain a filtered value, and, determining, via the controller, a stuck condition of one or more rotor blades of the wind turbine based on the filtered value. The method can also include performing a control operation to reduce loading on the wind turbine based on the stuck condition.

Abstract: A method of operating a wind turbine and a method of determining fatigue in a wind turbine component are provided. The method of operating a wind turbine comprises determining a reference accumulated fatigue, determining an operational time, obtaining a partial load indicator, determining a real accumulated fatigue, comparing the real accumulated fatigue and the reference accumulated fatigue and controlling the operation of the wind turbine. The method of determining fatigue in a wind turbine component comprises determining an operational time, obtaining wind speed, obtaining turbulence intensity, determining a time for each combination of wind speed and turbulence intensity and determining a real accumulated fatigue. In a further aspect, this is also provided a wind turbine controller configured to perform any of the methods herein disclosed.

Abstract: Embodiments of the present disclosure are directed to an energy recovery system for a heating, ventilation, and/or air conditioning (HVAC) system. The energy recovery system includes a nozzle having a flow passage with an inlet passage and an outlet passage that is narrowed relative to the inlet passage, in which the nozzle is configured to couple to a condenser and receive an air flow into the flow passage from a condenser fan. The energy recovery system further includes a wind turbine disposed within the outlet passage of the flow passage and having a first axis of rotation, and a generator that is external to the nozzle and that includes a shaft with a second axis of rotation. The generator is coupled to the wind turbine, such that the first axis of rotation is aligned with the second axis of rotation.

Abstract: According to a first aspect of the present invention there is provided an arrangement comprising, a volitant body comprising at least one actuator; a control unit for controlling said actuator; and a mechanical arrangement for operationally connecting said volitant body to a reference point remote from said volitant body. There is further provided a corresponding method for operating such an arrangement.

Abstract: In a motor according to an aspect of the invention, a brake includes a first clamp and a second clamp, a member to be clamped disposed between the first clamp and the second clamp, a first fixing member configured to fix the member to be clamped to a shaft, and a driving section configured to bring the first clamp and the second clamp into contact with the member to be clamped. The first clamp includes a first contact section. The second clamp includes a second contact section. A first housing hole is provided in a housing. The driving section includes a power cable drawn out to the outside of the housing via the first housing hole. The first housing hole overlaps the first contact section, the second contact section, the member to be clamped, and the first fixing member in a plan view from a first radial direction.

Abstract: A method of controlling a wind turbine is provided. The method comprises providing a primary power reference signal and a secondary power reference signal. The primary power reference signal is limited according to a primary signal limit. The secondary power reference signal is limited according to a secondary signal limit. The primary power reference signal and the secondary power reference signal are combined to provide a combined power reference signal, which is provided to a power or torque control system of the wind turbine.

Abstract: The invention relates to a method for measuring and correcting the angle of attack in a wind turbine farm (11), by which means the yield of each wind turbine (11) of the wind farm is measured initially in order to be able to define a model wind turbine which will be the one which generates the maximum power. The creation of coordinate axes for each blade (15) of the wind turbine (10) allows the angle of attack of the blades (15) of said model wind turbine (10) to be calculated and a reference value to be defined in order to copy same to each blade (15) of the rest of the wind turbines (11), in such a way that the optimum power ratio is obtained for each wind turbine of the wind farm.

Abstract: A solar and wind energy collection system, wherein solar power is gathered to perform the task of restarting the wind turbine. The system includes a wind turbine assembly with the wind turbine assembly including a plurality of wind turbine blades, a control system, a wind turbine blade positioning motor, a support structure, a solar energy collecting system including a thin film solar amorphous silicon photovoltaic material secured to the wind turbine support structure, and a wind turbine blade positioning control system that is operatively connected to the solar energy collecting system and the wind turbine blade positioning motor.

Abstract: A wind turbine is described which includes a support structure, a rotor which includes one or multiple rotor blades and which is situated on the support structure so that the rotor is freely rotatable about a rotation axis, and a generator which is connected to the rotor and which converts the wind energy into electrical energy when the rotor is rotating. The support structure includes a stationary ring on which the rotor is rotatably guided and on which the stator of the generator is situated.

Abstract: A tidal current generating unit, including a turbine, a hub, a generator, a bearing set and a fixed flange. The turbine is connected to the rotor of the generator through the hub, and the rotor is rotatably mounted on the outer circumference of the stator of the generator via the bearing set, and the turbine drives the rotating component to rotate to generate electricity. A density of a blade is much smaller than a density of the seawater, such that the blade has a sufficient buoyancy that offsets the gravity of the rotating component in seawater, and the load of the bearing sets is reduced. The blade is a backswept blade and the hydrodynamic central axis of the blade is inclined from a flange central axis of the blade at a first angle, and the blade is able to automatically change the pitch without relying on an external force.

Abstract: A method for maintaining sufficient reactive current margin in a power system connected to a power grid includes receiving, via a power limiter system, a reactive current command and an upper reactive current limit for the power system. The method also includes determining, via the power limiter system, a reactive current margin signal as a function of the reactive current command and the upper reactive current limit. Further, the method includes generating, via the power limiter system, a power command signal based on the reactive current margin signal. Moreover, the method includes controlling, via a system controller, operation of the power system based at least partially on the power command signal.

Abstract: Disclosed is a method of controlling wind turbines of a wind farm, each connected to a wind farm grid, in case of a disconnect from a main grid. During the disconnect from the main grid, at least one demand value is transmitted from a digital master grid controller to respective converter units of the wind turbines via a digital data link such that the converter units receive the at least one demand value substantially simultaneously and are operable to keep the wind turbines online and synchronised to the wind farm grid during the disconnect from the main grid.

Abstract: A wind power plant system comprising: a plurality of wind turbine generators each having a corresponding generator controller, and a power plant controller for controlling the power generated by the wind power plant system; wherein at least some of the plurality of generator controllers are each configured to: generate a model that indicates the thermal capacity of one or more components of the wind turbine generator, determine power capacity data from the model, said data relating to: at least one reactive power supply level and a corresponding time limit for which that reactive power supply level may be maintained, and transmit to the power plant controller the determined power capacity data, wherein the power plant controller is operable to receive the power capacity data from the plurality of generator controllers and to transmit respective power references to the plurality of generator controllers to control the power generated by the wind power plant system.

Abstract: A system for generating power includes an environmental engine operating on one or more computing devices that determines a Reynolds number for a wind turbine, wherein the Reynolds number characterizes wind flowing over a blade of the wind turbine that varies based on the wind speed, a rotor speed and characteristics of the blade of the wind turbine. The system also includes an artificial intelligence (AI) ensemble engine operating on the one or more computing devices that generates a plurality of different models for the wind turbine. Each model characterizes a relationship between the rotor speed and a blade pitch for the wind turbine, the Reynolds number, wind speed and turbulence intensity for the wind turbine. The AI ensemble engine selects a model with a highest efficiency metric; and simulates execution of the selected model to determine recommended operating parameters.

Abstract: One object is to improve the control upon detecting an excessive load in the movable section of a wind turbine, thereby to raise the capacity utilization of the wind turbine. A wind turbine drive system includes: a plurality of driving devices installed in one structure at a movable section of a wind turbine, each of the plurality of driving devices including a drive gear meshing with a ring gear installed in another structure at the movable section of the wind turbine; a state quantity detection unit for monitoring, for each of the plurality of driving devices, a load generated between the drive gear of each of the plurality of driving devices and the ring gear; and a control unit for performing control for reducing the load when the state quantity detection unit detects an abnormal load.

Abstract: A motion generator, comprising several levers inserted in a variable positioning mobile system to compress, or to expand, elastic or magnetic components, by using them as energy storage devices which discharge the energy stored on one or more cranks connected to an output member from which the motion can be taken.

Abstract: The present disclosure provides a primary frequency modulation method for a wind turbine, which may include: detecting a current frequency of a power grid; determining an instruction value of a power change amount for a primary frequency modulation by a first determining process when the current frequency of the power grid is less than a standard frequency of the power grid, wherein the first determining process may include: determining a reference value of the power change amount for the primary frequency modulation based on the current frequency; and when it is determined that currently there is an active power headroom for the wind turbine, comparing the reference value with a current active power headroom value of the wind turbine and determining the instruction value of the power change amount for the primary frequency modulation; and performing the primary frequency modulation based on the instruction value of the power change amount.

Abstract: The present invention relates to control of a wind turbine, and in particular it relates to a distributed control system including a blade controller for each blade of the wind turbine. The electrical connection between each blade controller and the power supply of the blade controller is arranged to be functionally isolated from the electrical connection of each other blade controller and the power supply of the respective blade controllers.

Abstract: A method for the determination of the deflection of a wind turbine blade is provided. A distance between at least one root location towards a root end of the wind turbine blade and at least one tip location towards a tip end of the wind turbine blade is measured. A blade deflection profile is then calculated based on the measured distance between the root and tip locations and a known modal profile of the wind turbine blade.

Abstract: A method for damping an oscillation of a tower of a wind turbine is disclosed, wherein a pitch angle of each of the one or more rotor blades is individually adjustable, the method comprising damping the oscillation of the tower by pitching each rotor blade individually according to tower damping pitch control signals, wherein each tower damping pitch control signal comprises a first periodic component, where a first frequency of the first periodic component corresponds to a frequency difference between a tower frequency of the oscillation of the tower and a rotor frequency of a rotation of the rotor, and where a second periodic component has been reduced or removed. A second frequency of the second periodic component corresponds to a frequency sum of the tower frequency and the rotor frequency.

Abstract: A method for manufacturing a smart card includes: planting a solder ball on the secure chip solder pad of the main circuit board; according to the position of the secure chip solder pad on the main circuit board, milling out a groove on the substrate on which the main circuit board is packed, such that the solder ball on the secure chip solder pad is visible at the bottom of the groove; packing the secure chip module into the groove, and by use of the solder ball on the secure chip solder pad, mounting the secure chip module onto the main circuit board. The method is capable of improving the quality of the wiring of the main circuit board; and increasing the scalability of the smart card.

Abstract: A method for controlling the pitch angle of the blades including the following steps of: measuring an energy storage of the blades pitch actuation system at predefined values of a first blade pitch angle interval; comparing the measured values of the energy storage of the blades pitch actuation system with a predefined minimum value of the energy storage; if the measured values of the energy storage are all greater or equal than the predefined minimum value of the energy storage then enabling normal operation; if at least one of the measured values of the energy storage are lower than the predefined minimum value then: calculating a third pitch angle calculating a third blade pitch angle interval extending between a fourth pitch angle and the second pitch angle; and limiting the blades pitch actuation system to operate only in the third pitch angle interval.

Abstract: Fault-tolerant electrical drive systems and methods of maintaining electrical balance or continuing operation of a rotary electric machine under a fault condition are provided. One such system comprises: a rotary electric machine comprising pn phases having a common connection point, where p is a prime number and n is an integer greater than or equal to 1; a drive circuit module having pn phase drive circuits and a reserve drive circuit; and a contactor module. The contactor module comprises: pn phase contactors each of which is operable to connect one of the pn phases of the rotary electric machine to a respective one of the pn phase drive circuits; and a phase fault contactor operable to connect the reserve drive circuit to the common connection point.

Abstract: A wind turbine control system comprising a controller of a control mechanism of a wind turbine, wherein the controller implements a computerized real-time blade model to calculate operational parameters of the controller, and wherein the computerized real-time blade model receives as inputs a determined wind turbine operating point and a rotor-plane wind speed value that is estimated in real-time. In another aspect, the embodiments of the invention provide a method of controlling a control mechanism of a wind turbine. Advantageously, the invention provides a more flexible and responsive control system that is able to adapt to changing wind conditions even if those wind conditions are beyond what is usually predicted.

Abstract: In examples, a computing system is configured to detect rotor imbalance at wind turbines by (1) obtaining sets of historical-vibration data for turbines, each set comprising vibration data captured by a given turbine's multi-dimensional sensor, (2) deriving a rotor-imbalance-detection model by: (a) for each turbine, (i) transforming time segments of the turbine's historical-vibration dataset into a frequency-domain representation, and (ii) for each time segment, using the frequency-domain representation for the time segment to derive a set of harmonic-mode values for at least one frequency-range of interest, thereby deriving a time-series set of harmonic-mode values for the turbine, and (b) performing an evaluation of the time-series sets for the turbines, thereby deriving the rotor-imbalance-detection model, (3) based on received vibration data for a given turbine from a reference time, executing the derived model, thereby detecting a rotor imbalance at the given turbine, and (4) transmitting a notification

Abstract: A blade 20 for a horizontal-axis wind turbine rotor comprises a radially-outer, energy-extraction portion 32 and a radially-inner, ventilation portion 30. The radially-inner ventilation portion 30 is shaped to ventilate a central area 34 of a wake of the rotor during use such that it contains more kinetic energy compared to the wake from a conventional rotor design. The increased wind flow velocity at the centre 34 of the wake generates additional shear stresses, with corresponding turbulence development, which gives rise to increased wake diffusion.

Abstract: A system includes a water turbine, a plurality of positioning winches coupled to the water turbine and a plurality of positioning cables. An individual positioning cable extends between a fixed point at a first end and the water turbine at a second end and is coupled to a corresponding positioning winch that is configured to extend and retract the individual positioning cable between the fixed point and the water turbine. A plurality of sensors is configured to sense water conditions around the water turbine. A position control system is connected to the plurality of positioning winches and connected to the plurality of sensors. The position control system is configured to position the water turbine using the plurality of positioning winches according to the water conditions sensed by the plurality of sensors.

Abstract: A wind turbine, power plant and associated method of controlling a wind turbine is provided. Data is obtained that identifies, based on forecast data, one or more future periods of time during which it would be desirable to over-rate the wind turbine, and measures of the fatigue life consumed by one or more turbine components are determined. The total fatigue life consumed by the one or more turbine components is limited prior to the one or more periods of time by controlling the power output of the wind turbine, in advance of the one or more periods of time, based upon the measure of the fatigue life consumed by the one or more turbine components.

Abstract: A method and associated control arrangement are disclosed for controlling a power output of a wind power plant (WPP) according to a predetermined power ramp rate limit, the WPP comprising a plurality of wind turbine generators (WTGs). The method comprises receiving a first signal indicating that a first WTG is in a ready state to begin producing power. The method further comprises, upon determining that, responsive to the received first signal, beginning power production of the first WTG at a predetermined default power ramp rate would cause the power output of the WPP to exceed the power ramp rate limit, controlling power production of the first WTG using at least one of: a first delay, a power ramp rate reference less than the default power ramp rate, and a power reference less than a nominal power output of the first WTG.