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    METHOD OF CALIBRATING LOAD SENSORS OF A WIND TURBINE
    1.
    发明申请
    METHOD OF CALIBRATING LOAD SENSORS OF A WIND TURBINE 审中-公开

    公开(公告)号：US20180135601A1

    公开(公告)日：2018-05-17

    申请号：US15580001

    申请日：2016-06-17

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Fabio CAPONETTI ,  Kasper Zinck OSTERGAARD ,  Dan HILTON

    IPC: F03D17/00 ,  F03D7/02 ,  G05B19/042

    Abstract: A method of calibrating load sensors of a wind turbine, and a wind turbine for such load sensor calibration, are disclosed. The wind turbine comprises a rotor, a plurality of rotor blades, and a plurality of load sensors associated with the rotor blades. While the rotor is rotating, at least one of the rotor blades is moved from a first calibration position to a second calibration position, and load values from the load sensors are measured. The number of rotor blades being moved is at least one fewer than the number of the plurality of rotor blades. The rotation of the rotor may be during idling of the wind turbine. The movement of the blade(s) may be to change the pitch angle of the blade(s). At least one of the rotor blades not being moved to a calibration position may also be moved, for example to control the rotational speed of the rotor.

    BLADE LOAD SENSING SYSTEM FOR A WIND TURBINE
    2.
    发明申请
    BLADE LOAD SENSING SYSTEM FOR A WIND TURBINE 审中-公开

    公开(公告)号：US20180156200A1

    公开(公告)日：2018-06-07

    申请号：US15736678

    申请日：2016-06-17

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Fabio CAPONETTI ,  Dan HILTON

    IPC: F03D17/00

    CPC classification number: F03D17/00 ,  F05B2260/80 ,  F05B2260/821 ,  F05B2260/84 ,  F05B2270/303 ,  F05B2270/325 ,  F05B2270/331 ,  F05B2270/808 ,  G01B11/16 ,  G01K13/00

    Abstract: A method for determining the load on a wind turbine blade, comprising: measuring the blade load by way of a wind turbine blade load sensor; estimating the temperature of the blade; and determining, based on the estimated temperature and the measured load, a temperature-corrected value for the load on the wind turbine blade. The invention also relates to a sensor system for a wind turbine blade, the system comprising a load sensor; a processing unit interfaced with the load sensor and configured to provide a temperature-corrected load parameter as an output, wherein the processing unit includes: a temperature estimation module that determines an estimated temperature of the blade in the vicinity of the load sensor based on at least one wind turbine parameter; and a load compensation module that determines the temperature-corrected load parameter based on the estimated temperature and the measurement of the load sensor.

    CORRECTING PITCH ANGLE
    5.
    发明申请
    CORRECTING PITCH ANGLE 有权

    公开(公告)号：US20220074386A1

    公开(公告)日：2022-03-10

    申请号：US17417082

    申请日：2019-12-03

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Johnny NIELSEN ,  Jens VAN SCHELVE ,  Goncalo Lucas MARCOS ,  Dan HILTON ,  Kristian KIIB

    IPC: F03D7/02

    Abstract: A method of correcting a pitch angle deviation of a blade of a wind turbine is provided. First blade load measurements measured when the wind turbine was operating in a first operational mode are provided, and used to determine calibration parameters. Second blade load measurements measured when the wind turbine was operating in a second operational mode are provided, and the calibration parameters applied to determine calibrated blade load measurements. A pitch angle deviation of at least one blade of the turbine is estimated based on an identified difference between the calibrated blade load measurements, and a pitch angle is adjusted to correct for the pitch angle deviation.

    IMPROVEMENTS RELATING TO WIND TURBINE ROTOR ANGLE SENSING SYSTEMS
    6.
    发明申请
    IMPROVEMENTS RELATING TO WIND TURBINE ROTOR ANGLE SENSING SYSTEMS 审中-公开

    公开(公告)号：US20200284242A1

    公开(公告)日：2020-09-10

    申请号：US16617206

    申请日：2018-05-25

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： Fabio CAPONETTI ,  Kristian KIIB ,  Dan HILTON

    IPC: F03D17/00 ,  F03D7/02

    Abstract: This application describes a method of detecting an error in a rotor angle sensing system of a wind turbine, where the wind turbine comprises a rotor including a plurality of wind turbine blades, a blade load sensor associated with a respective one of the wind turbine blades, and a rotor angle sensing system configured to output a rotor angle signal. The blade load sensor is configured to output a measured blade load signal. The method comprises generating an estimated blade load signal based on at least the rotor angle signal; comparing the estimated blade load signal with the measured blade load signal to determine a phase difference between them; and identifying an error if the phase difference between the estimated blade load signal and the measured blade load signal exceeds a predetermined threshold.

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