The invention provides a wind
turbine generator independent variable
pitch control optimization method and
system based on a
laser radar. The method comprises the following steps that
numerical fitting is carried out on
wind speed and height data, measured by the
laser radar, in front of a wind
turbine generator to obtain a real
wind shear index and a real
wind shear formula; the height of the central point of each blade is determined according to the
azimuth angle of a wind wheel, and the
wind speed values of the central points of three blades are determined according to the
wind shear formula; fatigue load values are calculated under different wind shear indexes, and a critical wind shear index is determined; when the real wind shear index meets the starting condition set by the independent variable
pitch control, the independent variable
pitch control is started, the
pitch angle adjustment coefficient of each blade is determined according to the
wind speed values of the center points of the three blades, and three
blade pitch angle set values under the independent variable
pitch control mode are obtained; and otherwise, unified variable
pitch control is performed. According to the method, fatigue load caused by unbalanced
impeller thrust can be remarkably reduced, and the problem that the service life of parts such as a variable pitch drive and a variable
pitch bearing is shortened due to the fact that variable pitch is too frequent can also be relieved.