公开(公告)号：US20210372369A1

公开(公告)日：2021-12-02

申请号：US17402085

申请日：2021-08-13

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Fabio CAPONETTI ,  Claus Thy HENNINGSEN ,  Robert GRØN-STEVENS

IPC: F03D7/02 ,  F03D7/04

Abstract: There is presented a method for damping an edgewise vibration of a rotor blade of a wind turbine, wherein the method comprises measuring at the rotor blade a motion parameter of the edgewise rotor blade vibration, generating based on said motion parameter a blade pitch angle control signal, and damping the edgewise vibration of the rotor blade by pitching the rotor blade according to the blade pitch angle control signal, wherein the blade pitch angle control signal is arranged so that a resulting force on a rotor blade pitched according to the blade pitch angle control signal, in a direction of the edgewise vibration of the rotor blade in a coordinate system, which rotates with a rotor of the wind turbine, is opposite and proportional to the edgewise rotor blade vibration velocity.

公开(公告)号：US20180051675A1

公开(公告)日：2018-02-22

申请号：US15554356

申请日：2016-02-29

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg KJÆR ,  Robert BOWYER ,  Robert GRØN-STEVENS ,  Jacob Deleuran GRUNNET ,  Carsten Nørlund THOMSEN ,  Jesper Sandberg THOMSEN

IPC: F03D7/02 ,  G05B15/02

CPC classification number: F03D7/0284 ,  F03D7/0224 ,  F03D7/0276 ,  F05B2220/706 ,  F05B2270/1033 ,  F05B2270/32 ,  F05B2270/327 ,  F05B2270/328 ,  F05B2270/337 ,  G05B15/02 ,  Y02E10/723 ,  Y02E10/725

Abstract: Embodiments herein describe varying the rotor speed based on the current wind speed when operating in a low power mode. Generally, as the wind speed increases above the rated wind speed (i.e., the wind speed at which the turbine is capable of producing its rated or maximum output power), the rotor speed can be reduced thereby minimizing the risk that the turbine experiences smearing or torque reversals. In one embodiment, as the rotor speed decreases, the turbine maintains the ability to ramp to the rated power of the turbine only by pitching in the blades to an optimal blade pitch angle. Thus, upon receiving a request to cease operating in the low power mode, the turbine can increase the output power to the rated power without first increasing the rotor speed.

公开(公告)号：US20190154002A1

公开(公告)日：2019-05-23

申请号：US16308676

申请日：2017-06-13

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Fabio CAPONETTI ,  Claus Thy HENNINGSEN ,  Robert GRØN-STEVENS

IPC: F03D7/02 ,  F03D7/04

Abstract: There is presented a method for damping an edgewise vibration of a rotor blade of a wind turbine, wherein the method comprises measuring at the rotor blade a motion parameter of the edgewise rotor blade vibration, generating based on said motion parameter a blade pitch angle control signal, and damping the edgewise vibration of the rotor blade by pitching the rotor blade according to the blade pitch angle control signal, wherein the blade pitch angle control signal is arranged so that a resulting force on a rotor blade pitched according to the blade pitch angle control signal, in a direction of the edgewise vibration of the rotor blade in a coordinate system, which rotates with a rotor of the wind turbine, is opposite and proportional to the edgewise rotor blade vibration velocity.

公开(公告)号：US20170328342A1

公开(公告)日：2017-11-16

申请号：US15532871

申请日：2015-11-30

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg KJÆR ,  Jesper Sandberg THOMSEN ,  Robert GRØN-STEVENS

IPC: F03D7/02 ,  H02P9/10 ,  H02J3/38 ,  F03D9/25 ,  F03D80/80 ,  H02K7/18

Abstract: The invention relates to a method for limiting structural loads in a wind turbine in situations where the power produced by the wind turbine is increased or decreased. The limitation of structural loads is achieved by restricting the power ramp rate, i.e. the rate of change of increases or decreases in produced power. The restriction is only invoked if a maximum change of the produced power or the corresponding internal power reference within a time window exceeds a given threshold.