MULTI-ROTOR WIND TURBINE OSCILLATION DAMPING

    公开(公告)号:WO2020007431A1

    公开(公告)日:2020-01-09

    申请号:PCT/DK2019/050216

    申请日:2019-07-03

    Abstract: A method of damping oscillations in a multi-rotor wind turbine and a wind turbine are provided. The wind turbine comprises a wind turbine support structure and at least a first nacelle with a first rotor and a second nacelle with a second rotor, at least one of the nacelles being located at a position away from a central longitudinal axis of the wind turbine support structure. The method comprises the steps of receiving and processing motion data, selecting a damping algorithm and generating a pitch control signal. The processing comprises determining at least one prominent oscillation mode of the wind turbine support structure and selecting a corresponding damping algorithm.

    METHOD AND APPARATUS FOR TESTING A YAW SYSTEM

    公开(公告)号:WO2020125896A1

    公开(公告)日:2020-06-25

    申请号:PCT/DK2019/050399

    申请日:2019-12-17

    Abstract: A first aspect of the invention provides a method of testing a yaw system (200) of a wind turbine, the wind turbine comprising a rotor; the yaw system (200) comprising a yaw gear (202) coupled to the rotor so that rotation of the yaw gear (202) causes yaw rotation of the rotor, and first and second sub-systems (204a, 204b), the first sub-system (204a) comprising a first pinion gear (206a) and a first drive motor (208a) coupled to the yaw gear (202) by the first pinion gear (206a), the second sub-system (204b) comprising a second pinion gear (206b) and a second drive motor (208b) coupled to the yaw gear (202) by the second pinion gear (206b). The method comprises the steps of: testing the first sub-system (204a) by: applying a first yaw moment to the yaw gear (202) with the second drive motor (208b) via the second pinion gear (206b), reacting the first yaw moment with the first pinion gear (206a), monitoring a yaw motion parameter indicative of rotation of the yaw gear (202), and determining a condition of the first sub-system (204a) based on the monitored yaw motion parameter.

    APPLYING WIND TURBINE YAW MOMENT VIA PITCHING

    公开(公告)号:WO2019129326A1

    公开(公告)日:2019-07-04

    申请号:PCT/DK2018/050321

    申请日:2018-12-04

    Abstract: There is presented a method 310 for controlling a rotor 102 on a wind turbine 100, wherein the rotor is comprising one or more blades 103, and wherein the wind turbine is comprising a pitch system, the method comprising: Operating 312 the rotor in a standstill or idling operating state, determining or receiving 314 one or more control parameters, where the control parameters enable determining one or more yawing parameters may be described as a function of the one or more control parameters, wherein the one or more yawing parameters comprises one or more of: An angular yawing velocity of the a yawing section, an angular yawing acceleration of the yawing section, and/or a yawing moment applied by the yawing section on a remainder of the wind turbine, and pitching 316 based on the one or more control parameters one or more blades 103 of the rotor 100 with the pitch system.

    METHOD AND APPARATUS FOR MONITORING THE CONDITION OF A YAW SYSTEM

    公开(公告)号:WO2020125897A1

    公开(公告)日:2020-06-25

    申请号:PCT/DK2019/050400

    申请日:2019-12-17

    Abstract: A first aspect of the invention provides a method of monitoring the condition of a yaw system of a wind turbine, the wind turbine comprising a rotor, the yaw system arranged to control a yaw rotation of the rotor, the method comprising: providing design data 5 representing an expected relationship between yaw moment and yaw rotation speed; measuring a pair of parameters, the pair of parameters comprising a yaw moment parameter indicative of a yaw moment applied to the yaw system, and a yaw rotation speed parameter indicative of a yaw rotation speed caused by the yaw moment; using the design data to evaluate whether the pair of parameters deviates from the expected 10 relationship; and determining a condition of the yaw system on the basis of the evaluation.

    MULTI-ROTOR WIND TURBINE VIBRATION DAMAGE PROTECTION

    公开(公告)号:EP3591218A1

    公开(公告)日:2020-01-08

    申请号:EP19183771.5

    申请日:2019-07-02

    Abstract: A method of protecting a multi-rotor wind turbine support structure (101) against vibration induced overload is provided. The wind turbine (100) comprises at least a first nacelle (111) with a first rotor (110) and a second nacelle (121) with a second rotor (120), at least one of the nacelles (111, 121) being located at a position away from a central longitudinal axis (102) of the wind turbine support structure (101). The method comprises steps of receiving motion data ( ÿ 0 , ÿ 1 , ÿ 2 ), determining a vibrational mode level and activating a safety mode if a vibrational mode level exceeds a respective vibrational mode threshold. The motion data ( ÿ 0 , ÿ 1 , ÿ 2 ) represents a movement of the first nacelle (111) and of the second nacelle (121) and is used for determining the vibrational mode level of at least one vibrational mode of the wind turbine support structure (101).

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