Wobben Properties Gmbh

Johannes Frommann

Enno Von Aswege

Ulf Schaper

Gnanasekaran Rengaraj

Wolfgang De Boer

Stephan Vollack

The present disclosure relates to a method of operating a wind turbine, a corresponding wind turbine, a method of controlling a wind farm and a corresponding wind farm. The method comprises the steps of: determining a target maximum active power to be fed by the wind turbine into a power grid, in particular into an electricity power grid; monitoring a current active power fed from the wind turbine into the power grid; determining a reference time period corresponding to the determined target maximum active power; deriving an average of the active power fed from the wind turbine into the power grid during the reference time period; comparing the average of the active power with the target maximum active power; and operating the wind turbine at a set operating point permitting active power above the target maximum active power in case the average of the active power is below the target maximum active power.

Method of operating a wind turbine, corresponding wind turbine and wind farm

Method for controlling a rotor speed of a rotor of a wind turbine at rated or curtailed operation conditions the rotor being an aerodynamic rotor having one or a plurality of rotor blades, and the wind turbine further having a tower and a generator wherein a pitch control provides a pitch angle set value depending on an actual rotor speed for setting a pitch angle of the rotor blades, a main control provides a main power or torque set value for controlling the power or torque of the generator, and an additional control provides an additional power or torque set value depending on the actual rotor speed, wherein the additional power or torque set value is provided as an offset value and is added to the main power or torque set value respectively, wherein the additional power or torque set value is calculated depending on a control deviation of the rotor speed, and optionally, in combination with the additional control, or instead of it, a maximum power control provides a maximum power value as a varying value for limiting an output power of the generator and the maximum power value is calculated depending on a predetermined power limit value, and depending on a predetermined reference duration, in order to provide for the reference duration an average power reaching or at least not exceeding the predetermined power limit value.

Method for controlling the rotor speed of a wind turbine

Provided is a method for identifying a blade malposition of a rotor blade of a wind power installation having one rotor and at least three rotor blades which in terms of the blade angles thereof are individually adjustable. For each rotor blade an actual angle is detected as the actual value of the blade angle; and the blade malposition is identified as a function of a blade angle deviation of the rotor blade and a rotational progress of the rotor. The blade angle deviation describes a deviation of the actual angle from a reference angle, and the rotational progress is representative of an angle about which the rotor has rotated onward after a start criterion. Blade malpositions in rotor blades which in terms of the blade angles thereof are individually adjustable are identified rapidly and reliably.

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Hamburg, Germany

Johannes Frommann