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    Method for controlling a wind turbine during shutdown
    2.
    发明授权
    Method for controlling a wind turbine during shutdown 有权

    公开(公告)号：US09709033B2

    公开(公告)日：2017-07-18

    申请号：US14395849

    申请日：2013-04-22

    Applicant: Vestas Wind Systems A/S

    Inventor： Keld Hammerum ,  Thomas Krüger

    IPC: F03D7/02

    CPC classification number: F03D7/0224 ,  F03D7/0264 ,  Y02E10/723

    Abstract: A method for controlling an individually pitched wind turbine during shutdown is disclosed, the wind turbine comprising at least three wind turbine blades (1a, 1b, 1c). In response to a shutdown command for stopping operation of the wind turbine, a blade parameter of each of the wind turbine blades (1a, 1b, 1c), e.g. pitch angle, bending moment or blade acceleration, is determined. The blade parameters of the wind turbine blades (1a, 1b, 1c) are compared, and a shutdown strategy for the wind turbine is selected from a group of two or more predefined shutdown strategies, based on the comparing step. Finally, the wind turbine blades (1a, 1b, 1c) are moved towards a feathered position in accordance with the selected shutdown strategy.

    Counteracting tower oscillations of an idling wind turbine
    5.
    发明授权
    Counteracting tower oscillations of an idling wind turbine 有权

    公开(公告)号：US10590912B2

    公开(公告)日：2020-03-17

    申请号：US15103126

    申请日：2014-12-03

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Fabio Caponetti ,  Martin Brødsgaard ,  Thomas Krüger

    IPC: F03D7/02 ,  F03D9/25

    Abstract: The invention presents a method for operating a horizontal axis wind turbine, the wind turbine comprising a tower and a rotor with at least one rotor blade, the rotor being connected to the tower, and being adapted to drive a generator connected to a utility grid, wherein a pitch angle of each rotor blade is adjustable, the method comprising detecting, when the wind turbine is in an idling power producing situation in relation to the utility grid, a tower oscillation, and controlling, when the wind turbine is in the idling power producing situation, the pitch angle of the at least one rotor blade so as to produce aerodynamic forces counteracting the detected tower oscillation.

    METHOD OF OPERATING A WIND TURBINE AS WELL AS A SYSTEM SUITABLE THEREFORE
    6.
    发明申请
    METHOD OF OPERATING A WIND TURBINE AS WELL AS A SYSTEM SUITABLE THEREFORE 有权
    风力涡轮机的运行方式可以作为适合的系统

    公开(公告)号：US20150132129A1

    公开(公告)日：2015-05-14

    申请号：US14406409

    申请日：2013-06-07

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Martin Atzler ,  Per Brath ,  Thomas Krüger ,  Ali Zaib

    IPC: F03D7/04 ,  F03D7/02

    CPC classification number: F03D7/044 ,  F03D7/0224 ,  F03D7/024 ,  F03D7/0296 ,  F03D7/043 ,  F05B2260/966 ,  F05B2270/331 ,  Y02E10/723

    Abstract: A method of operating a wind turbine is provided. The wind turbine comprises a turbine rotor with at least two blades, each blade having a variable pitch angle. The method comprises determining mechanical loads on the blades, determining an asymmetric load moment experienced by the turbine rotor based on the mechanical loads on the blades, determining high order harmonics from the asymmetric load moment, and determining an individual pitch control signal for each of the blades for varying the pitch angle of each blade to compensate for the asymmetric load moment. The individual pitch control signal for each blade is determined at least based on the high order harmonics.

    Abstract translation: 提供了一种操作风力涡轮机的方法。 风力涡轮机包括具有至少两个叶片的涡轮转子，每个叶片具有可变的俯仰角。 该方法包括确定叶片上的机械载荷，基于叶片上的机械负载确定涡轮转子经历的不对称载荷力矩，从非对称载荷力矩确定高次谐波，以及确定每个 用于改变每个叶片的俯仰角以补偿不对称载荷力矩的叶片。 至少基于高阶谐波确定每个叶片的各个俯仰控制信号。

    METHOD FOR CONTROLLING A WIND TURBINE DURING SHUTDOWN
    7.
    发明申请
    METHOD FOR CONTROLLING A WIND TURBINE DURING SHUTDOWN 有权
    风力发电机组控制方法

    公开(公告)号：US20150086360A1

    公开(公告)日：2015-03-26

    申请号：US14395849

    申请日：2013-04-22

    Applicant: Vestas Wind Systems A/S

    Inventor： Keld Hammerum ,  Thomas Krüger

    IPC: F03D7/02

    CPC classification number: F03D7/0224 ,  F03D7/0264 ,  Y02E10/723

    Abstract: A method for controlling an individually pitched wind turbine during shutdown is disclosed, the wind turbine comprising at least three wind turbine blades (1a, 1b, 1c). In response to a shutdown command for stopping operation of the wind turbine, a blade parameter of each of the wind turbine blades (1a, 1b, 1c), e.g. pitch angle, bending moment or blade acceleration, is determined. The blade parameters of the wind turbine blades (1a, 1b, 1c) are compared, and a shutdown strategy for the wind turbine is selected from a group of two or more predefined shutdown strategies, based on the comparing step. Finally, the wind turbine blades (1a, 1b, 1c) are moved towards a feathered position in accordance with the selected shutdown strategy.

    Abstract translation: 公开了一种用于在关闭期间控制单独倾斜的风力涡轮机的方法，所述风力涡轮机包括至少三个风力涡轮机叶片（1a，1b，1c）。 响应于用于停止风力涡轮机的操作的关闭命令，每个风力涡轮机叶片（1a，1b，1c）的叶片参数，例如， 桨距角，弯矩或叶片加速度。 比较风力涡轮机叶片（1a，1b，1c）的叶片参数，并且基于比较步骤从一组两个或更多个预定义的关闭策略中选择风力涡轮机的关闭策略。 最后，风力涡轮机叶片（1a，1b，1c）根据所选择的关闭策略朝着顺桨位置移动。

    Control of a wind turbine using real-time blade model
    8.
    发明授权
    Control of a wind turbine using real-time blade model 有权

    公开(公告)号：US10975845B2

    公开(公告)日：2021-04-13

    申请号：US16088739

    申请日：2017-03-30

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Jacob Deleuran Grunnet ,  Thomas Krüger

    IPC: F03D7/04 ,  F03D7/02

    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.

    Rotor blade control for high winds
    9.
    发明授权
    Rotor blade control for high winds 有权

    公开(公告)号：US10662924B2

    公开(公告)日：2020-05-26

    申请号：US15037902

    申请日：2014-11-19

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Fabio Caponetti ,  Ian Couchman ,  Thomas Krüger ,  Ali Zaib ,  Carsten Nørlund Thomsen

    IPC: F03D9/00 ,  H02P9/04 ,  F03D7/02 ,  F03D9/25 ,  H02J11/00 ,  H02K7/18

    Abstract: The invention relates to a control apparatus and method for controlling the rotor blades of a wind turbine, and in particular to controlling the rotor blades during an extreme wind event. An extended mode of operation of the wind turbine rotor beyond the cut-out wind speed is provided. In the extended mode of operation, the pitch of the wind turbine blades is actively controlled so that the rotor and the generator idle at a designated rotational speed. The rotational speed may be relatively high, say 15 to 20% of the nominal speed, compared with minimal speeds experienced by purely feathered wind turbine blades, and may be further controlled as a function of the incident wind speed. Output power control in the extended mode may be zero but is preferably a low, but non-zero value. The output power so produced may then be used as an auxiliary power source for controlling the wind turbine in situations where the utility grid fails.

    Improvements relating to the determination of rotor imbalances in a wind turbine
    10.
    发明授权
    Improvements relating to the determination of rotor imbalances in a wind turbine 有权

    公开(公告)号：US10480486B2

    公开(公告)日：2019-11-19

    申请号：US15503629

    申请日：2015-08-12

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Martin Brødsgaard ,  Thomas Krüger

    IPC: F03D7/04 ,  F03D7/02

    Abstract: A wind turbine comprising a tower, a rotor including a plurality of blades, an electrical generator operatively coupled to the rotor, and a control system including an active damping module configured to monitor oscillatory motion of the wind turbine and to output a damping demand signal to damp the oscillatory motion. The control system is configured to perform a rotor imbalance determination process including: controlling the rotating frequency of the rotor so that it substantially coincides with the natural frequency of the tower, determining rotor imbalance data based on the damping demand signal and evaluating said rotor imbalance data to determine the presence of a rotor imbalance condition, and correcting the rotor imbalance condition by applying pitch control inputs to one or more of the plurality of blades so as to reduce the severity of the rotor imbalance. The invention may also be expressed as a method.

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