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    ENERGY PRODUCTION LOSS DUE TO HIGH WIND HYSTERESIS CONTROL
    3.
    发明申请
    ENERGY PRODUCTION LOSS DUE TO HIGH WIND HYSTERESIS CONTROL 审中-公开

    公开(公告)号：WO2021249602A1

    公开(公告)日：2021-12-16

    申请号：PCT/DK2021/050174

    申请日：2021-06-03

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： BLOCK, Jens Kusk ,  BERRA, Asier

    IPC: F03D7/04 ,  F03D17/00 ,  F03D7/028 ,  F05B2260/821 ,  F05B2260/84 ,  F05B2270/3201

    Abstract: Aspects of the present invention relate to a computer-implemented method (100) for predicting energy production losses associated with high wind hysteresis control of a wind turbine generator. The method comprises: determining (102) a distribution of wind speeds; determining (104) a high wind hysteresis band that comprises wind speed values between an upper threshold and a lower threshold; and predicting (106) energy production loss due to the high wind hysteresis control. The prediction includes: determining (112) a high wind factor corresponding to a probability that the wind speeds in the hysteresis band occur when the generator is shut off by the high wind hysteresis control, determining (110), based on the distribution and power data, an energy value associated with the wind speeds falling within the hysteresis band over a predetermined time period; and determining (114) the energy production loss by applying the high wind factor to the determined energy value.

    CONTROLLER FOR A WIND FARM
    4.
    发明申请
    CONTROLLER FOR A WIND FARM 审中-公开

    公开(公告)号：WO2020083451A1

    公开(公告)日：2020-04-30

    申请号：PCT/DK2019/050318

    申请日：2019-10-22

    Applicant: VESTAS WIND SYSTEMS A/S

    Inventor： BERTELSEN, Kresten ,  BERRA, Asier ,  NIELSEN, Carsten Krogh

    IPC: F03D80/40 ,  F03D7/04

    Abstract: The invention provides a controller and method for determining the presence of ice at a wind farm with a number of wind turbines. The controller receives a current ambient temperature of the wind farm. The controller also receives a measured current wind speed from wind speed sensors of the wind turbines. The controller also receives an estimated current wind speed of each of the wind turbines that is based on measured performance parameters of the associated wind turbine. The controller determines a current wind speed difference between the measured current wind speed and the estimated current wind speed for each of the wind turbines, and determines a current delta distribution based on the current wind speed differences. The controller also determines whether an ice event has occurred, the determination being in dependence on the current ambient temperature and in dependence on the current delta distribution, and then outputs an outcome of the ice event determination.

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