Blade pitch angle control for large wind turbines
This patent describes a blade pitch angle control system for a wind turbine generator comprising a rotor having variable pitch airfoil blades fixed thereto and driving an electric generator through a drive train. The blade pitch angle control system includes control means providing a reference signal indicative of desired blade pitch angle at less than rated wind speed conditions. The control means is characterized by: means providing an output signal indicative of actual wind turbine output; means providing a frequency signal indicative of rotational frequency of the wind turbine; and signal processing means responsive to the output and frequency signals for continuously providing a minimum allowable blade pitch angle reference signal based on the aerodynamic performance capabilities of the airfoil blades and corresponding to attainment by the wind turbine of the output at less than rated wind velocity and at an optimal power ratio.
- Assignee:
- United Technologies Corp., Hartford, CT
- Patent Number(s):
- US 4656362
- OSTI ID:
- 6561498
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
170602* -- Wind Energy Engineering-- Turbine Design & Operation
AERODYNAMICS
AIRFOILS
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DATA PROCESSING
ELECTRIC GENERATORS
FLUID MECHANICS
FREQUENCY MEASUREMENT
INCIDENCE ANGLE
INCLINATION
MACHINE PARTS
MACHINERY
MECHANICAL TRANSMISSIONS
MECHANICS
MOTION
PERFORMANCE
POWER GENERATION
PROCESSING
ROTATION
ROTORS
SIGNALS
TURBINE BLADES
TURBINES
TURBOMACHINERY
VELOCITY
WIND
WIND TURBINES