SYSTEMS FOR MINIMIZING THE YAW TORQUE NEEDED TO CONTROL POWER OUTPUT BY YAWING, FOR WIND TURBINES WITH TWO HINGED TEETERING BLADES

摘要

Systems and methods for increasing operational efficiency of wind turbines, especially offshore wind turbines. The invention discloses systems and methods for reducing the torque needed to rotate a rotor shaft axis with respect to the wind direction. Systems and methods for controlling the rotational speed of the rotor shaft axis are also disclosed.