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公开(公告)号：US10738762B2
公开(公告)日：2020-08-11
申请号：US16091374
申请日：2017-04-07
Applicant: Vestas Wind Systems A/S
Inventor： Kasper Zinck Østergaard , Martin Brødsgaard , Tobias Gybel Hovgaard
Abstract: A method of controlling a wind turbine comprising at least one rotor blade, and at least one accelerometer housed within a nacelle or a tower of the wind turbine. The method comprises: determining a whirling mode frequency for the wind turbine; measuring an acceleration signal that is indicative of the movement of the nacelle of the wind turbine; determining a frequency spectrum of the measured acceleration signal in the proximity of the determined whirling mode frequency; determining a characteristic value that is representative of the energy content of the measured acceleration signal having the determined frequency spectrum; and performing at least one control action if the characteristic value exceeds a predetermined threshold.
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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
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.
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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
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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公开(公告)号：US20190154001A1
公开(公告)日：2019-05-23
申请号：US16091374
申请日：2017-04-07
Applicant: Vestas Wind Systems A/S
Inventor： Kasper Zinck Østergaard , Martin Brødsgaard , Tobias Gybel Hovgaard
CPC classification number: F03D7/0296 , F03D7/0224 , F03D7/0276 , F03D7/042 , F03D17/00 , F05B2260/70 , F05B2260/96 , F05B2270/101 , F05B2270/807 , Y02E10/723
Abstract: A method of controlling a wind turbine comprising at least one rotor blade, and at least one accelerometer housed within a nacelle or a tower of the wind turbine. The method comprises: determining a whirling mode frequency for the wind turbine; measuring an acceleration signal that is indicative of the movement of the nacelle of the wind turbine; determining a frequency spectrum of the measured acceleration signal in the proximity of the determined whirling mode frequency; determining a characteristic value that is representative of the energy content of the measured acceleration signal having the determined frequency spectrum; and performing at least one control action if the characteristic value exceeds a predetermined threshold.
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