SYSTEM AND METHOD FOR BRAKING A WIND TURBINE ROTOR AT AN OVERSPEED CONDITION
First Claim
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1. A wind turbine, comprising:
- a hub with a plurality or rotor blades configured thereon, said hub connected to a generator rotor via a drive train;
a sensor disposed to monitor rotation of said rotor;
a brake configured to reduce the rotational speed of said rotor;
a brake control system operatively coupled to said brake and said sensor, said brake control system configured to apply a braking torque to said rotor via said brake at a first setpoint rotational speed and to proportionally increase the braking torque as the detected rotational speed of said rotor increases beyond the first detected setpoint rotational speed.
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Abstract
A system and method for braking a wind turbine includes monitoring rotation of the wind turbine generator rotor. A braking torque is applied to reduce the rotational speed of the rotor at a first setpoint rotational speed. The braking torque is proportionally increased as the rotational speed of the rotor increases beyond the first detected setpoint rotational speed up to a maximum braking torque.
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Citations
16 Claims
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1. A wind turbine, comprising:
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a hub with a plurality or rotor blades configured thereon, said hub connected to a generator rotor via a drive train; a sensor disposed to monitor rotation of said rotor; a brake configured to reduce the rotational speed of said rotor; a brake control system operatively coupled to said brake and said sensor, said brake control system configured to apply a braking torque to said rotor via said brake at a first setpoint rotational speed and to proportionally increase the braking torque as the detected rotational speed of said rotor increases beyond the first detected setpoint rotational speed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling rotational speed of a wind turbine in an over speed condition, comprising:
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monitoring rotation of a wind turbine generator; applying a braking torque to the rotor at a first setpoint rotational speed; and proportionally increasing the braking torque as a function of rotor rotational speed as the rotational speed of the rotor increases beyond the first setpoint rotational speed. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification