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公开(公告)号：US11578695B2
公开(公告)日：2023-02-14
申请号：US16855159
申请日：2020-04-22
摘要： Techniques for controlling rotor speed of a wind turbine. One technique includes defining a system model describing resonance dynamics of a wind turbine component, such as a wind turbine tower, where the system model has a nonlinear input term, e.g. a periodic forcing term. A transform is applied to the system model to obtain a transformed model for response oscillation amplitude of the wind turbine component, where the transformed model has a linear input term. A wind turbine model describing dynamics of the wind turbine is then defined, and includes the transformed model. A model-based control algorithm, e.g. model predictive control, is applied using the wind turbine model to determine at least one control output, e.g. generator torque, and the control output is used to control rotor speed of the wind turbine.
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公开(公告)号：US10738762B2
公开(公告)日：2020-08-11
申请号：US16091374
申请日：2017-04-07
摘要： A method of controlling a wind turbine comprising at least one rotor blade, and at least one accelerometer housed within a nacelle or a tower of the wind turbine. The method comprises: determining a whirling mode frequency for the wind turbine; measuring an acceleration signal that is indicative of the movement of the nacelle of the wind turbine; determining a frequency spectrum of the measured acceleration signal in the proximity of the determined whirling mode frequency; determining a characteristic value that is representative of the energy content of the measured acceleration signal having the determined frequency spectrum; and performing at least one control action if the characteristic value exceeds a predetermined threshold.
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公开(公告)号：US10465659B2
公开(公告)日：2019-11-05
申请号：US15759150
申请日：2016-09-27
发明人： Keld Hammerum , Martin Ansbjerg Kjær , Jesper Sandberg Thomsen , Eik Herbsleb , Tobias Gybel Hovgaard
IPC分类号： F03D7/04 , G05B19/042 , G05B21/02 , G05B13/04
摘要： The present disclosure relates to a control system for a wind turbine comprising more controllers and where at least some of the controllers operate at different sample frequencies. The control system comprises at least two controller units, a first controller (10) for determining an operational value (OV) of a sub-system and a second controller (20) for the sub-system. The second controller operates at a higher sample frequency than the first controller. It is disclosed that a faster reaction to a received demand value (V1), received for controlling the sub-system, can be obtained by setting the operational value (OV) of the sub-system as the sum of an internal operational value (V5) and a difference value (V4).
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公开(公告)号：US10337497B2
公开(公告)日：2019-07-02
申请号：US15504170
申请日：2015-08-14
摘要： The present invention relates to control of wind turbines based on predicted operational trajectories. A control system for a wind turbine is described where a main controller calculating one or more predicted operational trajectories and a safety controller validates at least one of the one or more predicted operational trajectories. The control system controls the wind turbine with the predicted control trajectory if the validation is valid, and controls the wind turbine with a safe-mode control trajectory if the validation is invalid. In an embodiment, the main controller is implemented as a receding horizon controller, e.g. in the form of a model predictive controller (MPC).
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公开(公告)号：US12006916B2
公开(公告)日：2024-06-11
申请号：US16888982
申请日：2020-06-01
CPC分类号： F03D7/045 , F03D1/06 , F03D7/02 , F03D7/0224 , F03D7/0256 , F03D7/0296 , F03D13/10 , F03D13/35 , F03D17/00 , F05B2240/3052 , F05B2270/332 , F05B2270/404
摘要： Techniques for controlling loading on a wind turbine blade in the flap-wise direction. A system model has a description of flap loading on the blade and is used to predict flap loading on the blade over a prediction horizon using the system model. A dynamic flap loading limit is determined based on predicted flap loading and a measured flap loading, and a constraint is defined to limit flap loading on the blade based on the dynamic flap loading limit. The predicted flap loading is used in a cost or performance function, and the cost function is optimized subject to the constraint to determine pitch for the blade to control flap loading on the blade. Advantageously, the dynamic limit varies based on discrepancies between predicted and measured flap loading to allow for adaptive back-off from extreme loads prior to such loads building up or being exceeded.
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公开(公告)号：US11996694B2
公开(公告)日：2024-05-28
申请号：US17288852
申请日：2019-09-25
CPC分类号： H02J3/381 , F03D9/007 , F03D80/20 , G05B13/024 , G05B13/026 , H02J3/46 , H02J13/00002 , H02S50/00 , F05B2220/708 , H02J2300/26 , H02J2300/28
摘要： A controller for controlling the operation of a power plant, the power plant comprising a wind turbine and a solar power generator, the controller comprising: an input arranged to receive an input signal indicative of an operating parameter of the solar power generator; a shadow detection module arranged to monitor the operating parameter and to detect a shadow at least partially shading the solar power generator, the detected shadow being caused by a blade of the wind turbine; a shadow prediction module arranged to predict at least one subsequent blade shadow in dependence on the detected blade shadow; a command module arranged to determine a command signal for controlling the solar power generator based on the blade shadow prediction; and an output arranged to output the command signal to the solar power generator.
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公开(公告)号：US11519386B2
公开(公告)日：2022-12-06
申请号：US16647267
申请日：2018-09-11
摘要： A method of controlling pitch of individual blades in a wind turbine is described, together with a suitable controller. Wind speed is determined as a function of azimuthal angle. Wind speed is then predicted for individual blades over a prediction horizon using this determination of wind speed as a function of azimuthal angle. The predicted wind speed for each individual blade is used in a performance function, which is optimized to control individual blade pitches.
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公开(公告)号：US11293404B2
公开(公告)日：2022-04-05
申请号：US16770869
申请日：2018-12-03
摘要： A main computing system maintains and optimizes a predictive control model for an energy system, wherein the main computing system receives state information for the energy system, optimizes the predictive control model, and generates control rules for control of the energy system. The one or more local computing systems, each have a local memory for storing control rules for controlling the associated local state. The main computing system receives local state information and updates control rules, wherein the updated control rules comprise a subset of the control rules generated by the main computing system selected to be appropriate to the local state information received at the main computing system.
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公开(公告)号：US10683844B2
公开(公告)日：2020-06-16
申请号：US15574456
申请日：2016-05-24
摘要： The present invention relates to control of wind turbines where a fatigue load measure is taken into account. Control of a wind turbine is described where a control trajectory is calculated based on a fatigue load measure, the fatigue load measure being determined from a predicted operational trajectory. In embodiments the predicted operational trajectories are calculated by using a model predictive control (MPC) routine, and the fatigue load measure includes a rainflow count algorithm.
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公开(公告)号：US11300101B2
公开(公告)日：2022-04-12
申请号：US16440451
申请日：2019-06-28
摘要： The present invention relates to a method for controlling a power plant for reducing spectral disturbances in an electrical grid being operative connected to the power plant, the power plant comprising a plant controller, at least one wind turbine and at least one auxiliary energy source, wherein the at least one wind turbine comprises a rotor adapted to drive a power generator via a shaft, wherein the generator is connectable with the electrical grid, and at least one damping controller configured to compensate structural oscillations of the wind turbine by controlling a torque on the shaft, wherein the at least one damping controller is capable of setting a limit of a control action on the shaft, the method comprising the steps of determining disturbance information for the power plant in the form of an electrical disturbance at a point of measurement electrically connected to the power plant, determining set-points for the at least one auxiliary energy source based on the determined disturbance information, and assigning the set-points to the at least one auxiliary energy source in order to counteract at least part of the electrical disturbance at the point of measurement using at least part of an available amount of energy from the at least one auxiliary energy source.
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