METHOD AND SYSTEM FOR CONTROLLING A WIND TURBINE TO MANAGE EDGEWISE BLADE VIBRATIONS

摘要

A method of controlling a wind turbine for the avoidance of edgewise vibrations. The method comprises determining a whirling mode frequency of a rotor blade of the wind turbine; determining an avoidance zone based on the whirling mode frequency, the avoidance zone being a rotor speed range; receiving a rotor speed setpoint; and either adjusting the rotor speed to a value outside the rotor speed range if the rotor speed setpoint is within the rotor speed range or adjusting the rotor speed to a value corresponding to the rotor speed setpoint if the rotor speed setpoint is outside the rotor speed range.