| 摘要 |
Method of operating a wind turbine having a rotor with a plurality of blades, and one or more pitch mechanisms for rotating the blades. The method comprises a sub-nominal zone of operation and a supra-nominal zone of operation for wind speeds above the nominal wind speed. The sub-nominal zone of operation comprises a first, a second and a third operational range. The first operational range extends from a cut-in wind speed to a first wind speed, wherein the rotor speed is kept substantially constant at a first value. The second operational range extends from the first wind speed to a second wind speed, wherein both the rotor speed and generator torque are varied as a function of wind speed. The third operational range extends from the second wind speed to the nominal wind speed, wherein the rotor speed is kept substantially constant at a second value, and wherein in the second operational range, the generator torque, T, is determined in accordance with T = k.É 2 , wherein w is the generator speed and k is non-constant over the second operational range. |
