公开(公告)号：US11959460B2

公开(公告)日：2024-04-16

申请号：US17779114

申请日：2020-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld Hammerum ,  Christian Jeppesen ,  Jon Sowman

IPC: F03D7/02

CPC classification number: F03D7/0252 ,  F03D7/0224 ,  F05D2260/70

Abstract: Control of a wind turbine in a stop process where a stop controller is used to pitch the blades at a number of pre-set pitch rates including a first pitch rate and a second pitch rate. The stop controller is arranged to access desired pitch angles of the stopping process and add an envelope band to the desired pitch angles. In the stop process, pitching at a selected pitch rate among the number of pre-set pitch rates is performed, and the pitch rate is changed according to criteria to keep the pitch value within the envelope band.

公开(公告)号：US10823144B2

公开(公告)日：2020-11-03

申请号：US14903550

申请日：2014-06-26

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld Hammerum

IPC: F03D7/02 ,  F03D7/04

Abstract: A method for controlling a wind turbine during a safety operation is disclosed. A safety pitch control system is provided to pitch the blades individually at a number of pre-set approximately constant pitch rates including a first pitch rate and a second pitch rate lower than the first pitch rate. In response to a command for initiating the safety operation the blades are pitched towards a feathering position by the safety pitch control system including the blades being pitched according to a safety pitch strategy wherein for all the blades the pitch rate is changed between the first pitch rate and the second pitch rate according to a function of each blade azimuthal position. This is done such that each blade in turn is closer to the feathering position than the others.

公开(公告)号：US10683844B2

公开(公告)日：2020-06-16

申请号：US15574456

申请日：2016-05-24

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld Hammerum ,  Tobias Gybel Hovgaard

IPC: F03D9/00 ,  H02P9/04 ,  F03D7/02 ,  F03D7/04

Abstract: 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.

公开(公告)号：US11939959B2

公开(公告)日：2024-03-26

申请号：US17779112

申请日：2020-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld Hammerum ,  Christian Jeppesen

IPC: F03D7/02

CPC classification number: F03D7/0224 ,  F03D7/0264

Abstract: The present invention relates to control of a wind turbine in a stop process in response to a rotor stop signal. The rotor stop process comprises the steps of prior to receipt of the rotor stop signal, generating a stored pitch angle signal by storing pitch angle signals for at least a fraction of a rotor revolution, and determining at least one periodic component of the stored signal. The rotor blades of the wind turbine are controlled towards a feathering position using a pitch control signal containing the at least one periodic component.

公开(公告)号：US11746756B2

公开(公告)日：2023-09-05

申请号：US17266934

申请日：2019-07-09

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Søren Dalsgaard ,  Torben Ladegaard Baun ,  Keld Hammerum ,  Torben Petersen

IPC: F03D80/50 ,  F03D7/02 ,  F03D1/02

CPC classification number: F03D80/50 ,  F03D1/02 ,  F03D7/0224 ,  F03D7/0264 ,  F03D7/0276 ,  F05B2240/37 ,  F05B2260/70 ,  F05B2270/3201 ,  F05B2270/327

Abstract: A method of operating a wind turbine during a service, wherein the wind turbine comprises at least one rotor-nacelle assembly, the or each rotor-nacelle assembly comprising a rotor; the method comprising: detecting that a service is to be or is being carried out on the wind turbine; and, on detecting that a service is to be or is being carried out on the wind turbine, reducing an operating level of the or each rotor-nacelle assembly.

公开(公告)号：US20210293220A1

公开(公告)日：2021-09-23

申请号：US17338443

申请日：2021-06-03

Applicant: Vestas Wind Systems A/S

Inventor： Tobias Gybel Hovgaard ,  Keld Hammerum ,  Kasper Zinck

IPC: F03D7/04 ,  F03D7/02

Abstract: A wind turbine control unit includes an upsampling module that receives a first control signal that includes a current control sample value and a predicted control trajectory. The upsampling module also calculates a second control signal in dependence on the current control sample value and the predicted control trajectory. The second control signal has a higher frequency than the first control signal. The upsampling module further outputs the second control signal for controlling an actuator.

公开(公告)号：US10697431B2

公开(公告)日：2020-06-30

申请号：US16091365

申请日：2017-04-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld Hammerum ,  Tobias Gybel Hovgaard ,  Erik Sloth

IPC: F03D7/02 ,  F03D7/04

Abstract: The present invention relates to control of wind turbines where a noise measure is taken into account. Control of a wind turbine is described where a control trajectory is calculated based on noise measure, the noise measure being determined from a predicted operational trajectory. In embodiments the predicted operational trajectories are calculated by using a model predictive control (MPC) routine.

公开(公告)号：US10030630B2

公开(公告)日：2018-07-24

申请号：US14782272

申请日：2014-04-22

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld Hammerum

IPC: F03D7/02

Abstract: A method for controlling a wind turbine during shutdown is disclosed, said wind turbine comprising a rotor carrying at least three wind turbine blades adapted to be pitched individually. A first shutdown strategy is initially selected, and subsequently a second shutdown strategy is selected, the second shutdown strategy ensuring alignment of the pitch angles of the wind turbine blades. The time for switching from the first shutdown strategy to the second shutdown strategy is calculated on the basis of a misalignment of the pitch angles, and in order to align the pitch angles before an estimated point in time where the pitch angles must be aligned, in order to avoid excessive asymmetric loads on the wind turbine blades and/or on the rotor. According to an alternative embodiment, the first shutdown strategy includes moving the wind turbine blades towards a feathered position at identical pitch rates.

公开(公告)号：US11421652B2

公开(公告)日：2022-08-23

申请号：US17054154

申请日：2019-05-07

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Jesper Sandberg Thomsen ,  Keld Hammerum

IPC: F03D7/02

Abstract: The present invention relates to a rotor control system for actuating pitch of pitch adjustable rotor blades in order to reduce vibrations of a wind turbine element, e.g. tower vibrations. A pitch modification signal is determined which is based on an m-blade coordinate transformation, such as the Coleman transformation. The m-blade coordinate transformation taking as input a first signal and a second signal. The second signal is determined by filtering the first signal with a signal filter with a quadrature phase shift filter phase response.

公开(公告)号：US11118568B2

公开(公告)日：2021-09-14

申请号：US16296843

申请日：2019-03-08

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld Hammerum ,  Tobias Gybel Hovgaard

IPC: F03D7/04 ,  F03D7/02

Abstract: The present invention relates to control of wind turbines in a situation where a fault condition is detected. Control of a wind turbine is described where a control trajectory and a safe-mode trajectory are calculated based on the current operational state of the wind turbine. If the fault condition is detected the wind turbine is controlled using the safe-mode trajectory, otherwise, the normal operation of the wind turbine is continued where the wind turbine is controlled using the control trajectory.