Vestas Wind Systems A/s

Jan Vestergaard Knudsen

Jesper Sandberg Thomsen

Martin Ansbjerg Kjær

Eik Herbsleb

Kasper Zinck Østergaard

Jacob Hviid Nielsen

Hans Kristian Bjørn

John Schwensen

Jakob Hviid Nielsen

Sanka Saibabu

Regulating a power ramp rate of a wind park at a point of common coupling (PCC) between the wind park and a utility grid. The method comprises receiving a power reference for the wind park; determining the power ramp rate of the wind park as a function of the power output of each individual wind turbine in the park, wherein the power ramp rate of the wind park is based on the power ramp rates of the individual wind turbines and determining a corresponding plurality of power set-points for each wind turbine based on the power ramp rates and power reference. The corresponding plurality of power set-points is dispatched to the plurality of wind turbines for regulating the power ramp rate of the wind park in dependency of the power ramp rates of the plurality of wind turbines.

Power ramp rate control

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

The present invention relates to a method for controlling a wind turbine, the wind turbine comprises a rotor connected to a generator, and a rotational speed controller configured to control a speed of the rotor in response to a generator speed reference, and a power controller to control an electric power production, the method comprises the step for receiving a boost command to request a power boost event, so to increase the electrical power production, and imposing a dead band with a dead zone value limit to the rotational speed controller, and wherein the dead band imposes a zero signal to be send to the rotational speed controller, when a speed error is within the dead zone value limit and wherein the dead band imposes an error signal to be send to the rotational speed controller, when a speed error is greater than the dead zone value limit, the error signal being a function of the speed error and the dead zone value limit. The invention also relates to a wind power plant comprising a power plant controller and at least one wind turbine with a control system according to the above mentioned method.

Increasing active power from a wind turbine

A method of controlling a wind turbine, where a control signal for a controllable parameter of the wind turbine is determined repeatingly at successive time steps, and a control history including respective control values derived from or included in past control signals is stored. These control values stored in the control history are then used to determine an alert parameter for the controllable parameter, the alert parameter being a function of the variations of the control signals over time. The wind turbine is then controlled according to the most recent control signal only if the alert parameter is below an alert threshold, and otherwise according to a modified control strategy. The control method may be performed on pitch reference signals for controlling the individual and/or collective pitch of the blades. The invention further relates to a control system configured to perform the above control method, and a wind turbine comprising such system.

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Risskov, Denmark

Jan Vestergaard Knudsen