Wind power generation variable pitch system brake resistor type selection design method and system based on load calculation

The invention discloses a wind power generation variable pitch system brake resistor type selection design method based on load calculation. The method comprises the steps that a blade root load sequence of a wind generating set under various working conditions with the time interval being t is obtained through simulation; calculating the power of the variable-pitch system under all working conditions according to the load sequence, counting the condition that the variable-pitch motor is in a power generation mode in all working conditions, and finding out the maximum number k of cycles of continuous power generation of the variable-pitch motor; calculating a continuous generation power value sequence of 1-k periods under each working condition; calculating a variable pitch system bus capacitor absorption energy power value sequence of 1-k periods; calculating a power value sequence of the variable-pitch system brake resistor in 1-k periods, and drawing a power curve of the brake resistor; and selecting the b