Wind turbine torque-speed control

摘要

The present subject matter relates to methods and systems for operating a wind turbine that, in some embodiments may include a gearbox. The wind turbine is provided with a blade having an adjustable pitch angle and the tip speed ratio (TSR) of the blade is monitored. In operation, the method and system is configured to increase the pitch angle of the blade concurrently with an increase in TSR to maintain turbine operation within an identified high power coefficient (Cp) operational region for the blade. TSR may be monitored by monitoring one of the velocity of the tip of the blade, wind speed, the rotational speed of the blade, or the rotational speed of a component within the gearbox.

主权项

1. A method for operating a wind turbine, comprising:
providing a wind turbine having at least one blade having an adjustable pitch angle; monitoring the tip speed ratio (TSR) of the at least one blade; identifying a high power coefficient (Cp) operational region for the at least one blade; performing the following steps in sequential order to maximize an amount of time turbine operation is within the identified Cp region:
increasing the pitch angle of the at least one blade concurrently with an increase in TSR to maintain turbine operation within the identified Cp region, wherein concurrently increasing the pitch angle of the at least one blade with the TSR reduces a generator torque of the wind turbine; and,increasing the pitch angle of the at least one blade concurrently with a decrease in TSR so as to limit a power output of the wind turbine to a rated power for the wind turbine.