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    DAMPING OF IN-PLANE VIBRATIONS IN MULTI-ROTOR STRUCTURES
    1.
    发明申请
    DAMPING OF IN-PLANE VIBRATIONS IN MULTI-ROTOR STRUCTURES 审中-公开

    公开(公告)号：WO2021143990A1

    公开(公告)日：2021-07-22

    申请号：PCT/DK2021/050007

    申请日：2021-01-12

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： NETO, Julio Xavier Vianna ,  DALSGAARD, Søren ,  COUCHMAN, Ian ,  SOWMAN, Jon

    IPC: F03D1/02 ,  F03D7/02 ,  F03D7/0224 ,  F03D7/0296 ,  F05B2270/807

    Abstract: Embodiments herein describe in-plane vibration damping techniques for MR turbines. The MR turbines can include arms that extend from a common tower and support multiple rotors. Because the rotors are disposed laterally away from the tower, side-to-side motion of the tower causes the rotors to have an angled trajectory that includes both lateral and vertical displacement. In addition, a rotor disposed on one side of the tower in MR turbine can have a very different trajectory than a rotor disposed on the opposite side of the tower. To account for the vertical displacement and the different trajectories, in one embodiment, a controller can use different phase offsets for each rotor when calculating pitch offsets for performing in-plane vibration damping. In another embodiment, the controller can use both the lateral and vertical accelerations of the rotors to identify the pitch offsets for the rotors to perform in-plane vibration damping.

    STOPPING A WIND TURBINE ROTOR USING PRE-SET PITCH RATES
    2.
    发明申请
    STOPPING A WIND TURBINE ROTOR USING PRE-SET PITCH RATES 审中-公开

    公开(公告)号：WO2021098926A1

    公开(公告)日：2021-05-27

    申请号：PCT/DK2020/050315

    申请日：2020-11-20

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： HAMMERUM, Keld ,  JEPPESEN, Christian ,  SOWMAN, Jon

    IPC: F03D7/02

    Abstract: The present invention relates to 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.

    DETERMINING TOWER TOP ACCELERATION OF A WIND TURBINE
    3.
    发明申请
    DETERMINING TOWER TOP ACCELERATION OF A WIND TURBINE 审中-公开

    公开(公告)号：WO2022258121A1

    公开(公告)日：2022-12-15

    申请号：PCT/DK2022/050119

    申请日：2022-06-03

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： KIIB, Kristian ,  SOWMAN, Jon

    IPC: F03D7/02 ,  F03D17/00 ,  F03D7/04

    Abstract: The invention provides a method of determining tower top acceleration of a wind turbine. The method includes receiving acceleration data from a plurality of acceleration sensors positioned in a nacelle of the wind turbine, including data indicative of a measured acceleration in a direction along at least one measurement axis of each respective acceleration sensor at a current time step. The method includes determining a predicted tower top acceleration of the wind turbine tower at the current time step, the predicted tower top acceleration being determined in dependence on a kinematic model of the wind turbine, and on a determined estimation of tower top acceleration at a previous time step. The method includes determining an estimated tower top acceleration of the wind turbine tower at the current time step by updating the predicted tower top acceleration based on the measured acceleration from each of the acceleration sensors.

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