Patent ID: 8793027
Filing Date: 2014-07-29
Classification: F03D,F05B,Y02E

Abstract:
1. A method for curtailing electrical power supplied from a wind turbine, the method comprising: determining an available electrical power level from the wind turbine under an optimum condition at a given wind speed and determining an optimal blade pitch angle for blades of a rotor of the wind turbine, wherein the optimal blade pitch angle corresponds to an optimal aerodynamic efficiency for the rotor at which the available electrical power level from the wind turbine is produced; setting a curtailment level for the wind turbine equal to a fixed power level that is independent of wind speed and determining a curtailed aerodynamic efficiency of the rotor at which the wind turbine generates electrical power equal to the difference between the available electrical power level and the curtailment level at the given wind speed; determining a blade pitch angle offset from the determined curtailed aerodynamic efficiency of the rotor, and wherein the determined curtailed aerodynamic efficiency is determined based on the optimal pitch angle; and adjusting the blade pitch angle of the blades of the rotor to an angle corresponding to the determined blade pitch angle offset so that the generated electrical power supplied from the wind turbine equals a difference between the available electrical power level and the curtailment level at the given wind speed.