IMPROVED WIND TURBINE NOISE CONTROL METHODS

摘要

A wind turbine having at least one trailing edge control surface (10) on at least one rotor blade (5) is operated in a first mode, in which a rotor blade angle of attack and a trailing edge control surface deflec¬ tion are set according to one or more wind turbine control parame¬ ters. The turbine is selectively operated in a second, noise reduced, mode, in which for a given set of wind turbine control parameters, the trailing edge control surface deflection is increased towards the pres¬ sure side and the rotor blade angle of attack is decreased with respect to the first mode. In the second mode, for a given set of control pa¬ rameters, the loading on the blade (5) is on average closer to a hub than in the first operating mode.