Rotational speed control of a wind turbine based on rotor acceleration
First Claim
1. A method for controlling the rotational speed of a rotor of a wind turbine during high wind speeds, the method comprisingdetermining a rotor acceleration value, wherein the rotor acceleration value is caused by a temporal change of the rotational speed of the rotor;
- controlling the rotational speed of the rotor as a function of the determined internal speed limit;
measuring the rotational speed of the rotor,calculating the rotor acceleration value by taking the derivative with respect to time of the measured rotational speed;
taking the absolute value of the calculated rotor acceleration value; and
determining an internal speed limit based on absolute value of the calculated rotor acceleration value.
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Abstract
It is described a method for controlling the rotational speed of a rotor of a wind turbine in particular at high wind speeds. The described method comprises (a) determining a rotor acceleration value, wherein the rotor acceleration value is caused by a temporal change of the rotational speed of the rotor, and (b) controlling the rotational speed of the rotor as a function of the rotor acceleration value. It is further described a control system for controlling the rotational speed of a rotor of a wind turbine, a wind turbine being equipped with such a control system and to a computer program, which is adapted for controlling and/or for carrying out the mentioned rotational speed control method.
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Citations
11 Claims
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1. A method for controlling the rotational speed of a rotor of a wind turbine during high wind speeds, the method comprising
determining a rotor acceleration value, wherein the rotor acceleration value is caused by a temporal change of the rotational speed of the rotor; -
controlling the rotational speed of the rotor as a function of the determined internal speed limit; measuring the rotational speed of the rotor, calculating the rotor acceleration value by taking the derivative with respect to time of the measured rotational speed; taking the absolute value of the calculated rotor acceleration value; and determining an internal speed limit based on absolute value of the calculated rotor acceleration value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification