Detecting a pitch angle adjustment fault
AssigneeSiemens Aktiengesellschaft
InventorsPer Egedal, Gustav Hoegh, Bjarne Skovmose Kallesoee
Life of this patent
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Abstract
A method for detecting a rotor blade pitch angle adjustment fault of a rotor blade of a wind turbine is provided, the method includes measuring a rotor blade pitch angle speed; predicting, based on an actual rotor speed, a rotor blade pitch angle speed; indicating a fault, if a first criterion is satisfied, wherein the first criterion is satisfied, if deviation between the measured rotor blade pitch angle speed and the predicted rotor blade pitch angle speed exceeds a speed threshold.
Claims17
A method for detecting a rotor blade pitch angle adjustment fault of a rotor blade of a wind turbine, the method comprising:
- measuring a rotor blade pitch angle speed during operation of the wind turbine wherein the rotor blade pitch angle speed is a speed or velocity with which a rotor blade pitch angle changes with time;
- predicting, based on an actual rotor speed, a predicted rotor blade pitch angle speed;
- and
- indicating a fault, if a first criterion is satisfied,
- wherein the first criterion is satisfied, if deviation between the measured rotor blade pitch angle speed and the predicted rotor blade pitch angle speed exceeds a speed threshold wherein indicating the fault further comprises activating a safety system which increases the rotor blade pitch angle.
A wind turbine controller comprising:
- an arrangement including a processor for detecting a rotor blade pitch angle adjustment fault of a rotor blade of a wind turbine, the arrangement of the wind turbine controller configured to:
- receive a measured rotor blade pitch angle speed and to receive an actual rotor speed wherein the measured rotor blade pitch angle speed is a speed or velocity with which a rotor blade pitch angle changes with time:
- predict, based on the actual rotor speed, a predicted rotor blade pitch angle speed and determine that a first criterion is satisfied, if a deviation between the measured rotor blade pitch angle speed and the predicted rotor blade pitch angle speed exceeds a speed threshold;
- and
- transmit a signal to a safety system which indicates a fault, if the first criterion is satisfied wherein the safety system causes a change in the rotor blade pitch angle of the rotor blade.
Dependencies are inferred from the claim text.