PITCH CONTROL SYSTEM FOR BLADE OF WIND POWER GENERATOR

摘要

PURPOSE: A blade pitch control system for an aerogenerator is provided to control a blade pitch at a pitch angle in which a power coefficient is maximized depending on a tip speed ratio in a low wind speed range, thereby increasing generating efficiency in the low wind speed range. CONSTITUTION: A blade pitch control system for an aerogenerator comprises an actuator(120), a pitch controller(110), and a main controller(130). The actuator controls the pitch of a blade. The pitch controller controls the actuation of the actuator. The main controller outputs a pitch control signal to the pitch controller. The pitch control signal from the main controller corresponds to a pitch angle in which a power coefficient is maximized in a generating range of more than one optimal TSR(Tip Speed Ratio). The main controller has a memory device which stores a look up table data which includes Cp(power coefficient) data per pitch angle in the generating range of the optimal TSR. The TSR in the generating range of the optimal TSR is 9 to 17. The pitch angle is controlled in order to maximize the Cp depending on the TSR in the generating range of the optimal TSR. [Reference numerals] (110) Pitch controller; (120) Actuator; (130) Main controller; (131) Look-up table; (AA) Wind velocity; (B) Blade; (BB) Generator speed