Blade pitch angle control for large wind turbines

Details Blade pitch angle control for large wind turbines Blade pitch angle control for large wind turbines

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170/32

F03D 11/00 (2006.01) F03D 7/02 (2006.01)

Patent

CA 1234543

Abstract A blade pitch angle control system for a wind turbine includes an improved control means (95) for providing a minimum pitch angle reference signal indicative of desired blade pitch at wind velocities less than rated. The control means includes means (35 and 30) for providing signals indicative of generated (output) power or torque and the rotational frequency of the wind turbine rotor. The output and rotor speed signals are input to a function generator which, in response to such signals, provides a signal indicative of the minimum pitch angle. H1031

439908

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