METHOD FOR TRACKING AND CONTROLLING OPTIMAL BLADE TIP SPEED RATIO OF WIND POWER GENERATION UNIT

摘要

Disclosed is a method capable of conducting adjustment at a low wind speed so that a fan operates under the condition of an optimal blade tip speed ratio, and simultaneously conducting periodic automatic correction on the value of the optimal blade tip speed ratio. The method comprises the following steps: calculating the exact power value of a generator via a feedback torque and a rotation speed, and calculating a wind speed via a power factor corresponding to the power and the optimal blade tip speed ratio; adjusting the rotation speed to make the fan operate at the optimal blade tip speed ratio under the condition where the rotation speed can be adjusted, and adjusting a pitch angle to make the fan operate at the optimal blade tip speed ratio under the condition where the rotation speed cannot be adjusted; and adopting a statistical average hill climbing method to correct the value of the optimal blade tip speed ratio corresponding to the minimum variable pitch angle.