Vestas Wind Systems A/s

Kasper Zinck Østergaard

Fabio Caponetti

Jacob Deleuran Grunnet

Jacob Hviid Nielsen

Jesper Lykkegaard Neubauer

Tobias Gybel Hovgaard

Martin Ansbjerg Kjær

Keld Hammerum

Poul Brandt Christensen

Per Brath

Dan Hilton

Frank Møller Hansen

Robert Grøn-Stevens

Jan Vestergaard Knudsen

Kenneth Tougaard Simonsen

Martin Brødsgaard

John Schwensen

Aleks Kvartborg Jakobsen

Christian Gjerløv

Leo Thesbjerg

Jakob Hviid Nielsen

Jesper Graugaard

Christian Skallebæk

Martin Jørgensen

Jan Graugaard-Jensen

Gustavo Monjo

Robert GRØN-Stevens

Damien Castaignet

Christian SKALLEBÆK

Kenneth Simonsen

There is provided a method for controlling a hydraulic pitch force system () so as to reduce or eliminate a decrease in hydraulic oil pressure () if a hydraulic system parameter value is outside a hydraulic system parameter range, the method comprising: Obtaining () the hydraulic system parameter value, and operating the hydraulic pitch force system () according to a reduced mode () if the hydraulic system parameter value is outside the hydraulic system parameter range, wherein in the reduced mode one or more pitch based activities are reduced () or suspended. An advantage thereof may be that it enables keeping the wind turbine in production in certain instances rather than shutting down the wind turbine. In aspects, there is furthermore presented a computer program product, a pitch control system () and a wind turbine ().

Method for controlling hydraulic pitch force system

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.

Method and system for controlling a wind turbine to manage edgewise blade vibrations

There is provided a pitch control system () for controlling a pitch force system () for pitching a blade () of a wind turbine (), the pitch control system () being arranged for activating () an auxiliary pitch force subsystem () at an initiation point in time where a main pitch force is sufficient to pitch the blade () into a target pitch value. An advantage thereof may be that tracking of a target pitch value may be improved and the impact on the pitch force system () may be reduced. In aspects, there is furthermore presented a hydraulic pitch system (), a wind turbine (), a method and a computer program product.

Pitch control system for pitching wind turbine blade

For optimising annual energy production in a wind turbine, the invention provides a method by which operation of the turbine in accordance with different pre-specified modes depending on the wind direction towards the turbine is enabled. The modes may include pitch and/or power control strategies. The invention further provides a control system for a wind turbine adapted to operate in accordance with the method, and a wind turbine with such a control system.

Wind turbine

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Flemming, Denmark

Kasper Zinck Østergaard