Research On The Variable Pitch Servo Control System Of Wind Turbine

Because of the characteristic of abundance, cleanness and regeneration, the wind energy has an unparalleled advantage in energy field. Meanwhile, more and more attention was paid on the research on wind power generation technology.The paper firstly introduced hydraulic pressure variable pitch control system in wind generating set, applied electric-hydraulic proportional control system to design the hydraulic pressure drive part of variable pitch system, analyzed the fluid recycle circuit of hydraulic pressure system under various working condition, made the type selection for main components and parts. It also designed the variable pitch control system, set up the mathematical model based on the analysis of physical property, made the simulation model by using the simulation tools, analyzed the stability of system. Put the PID control method into the variable pitch control system and carried out the simulation. Analysis the components of yawing system, and the process of a circular route of oil. It's difficult to find an accurate date for modeling as the yawing system is a servo system, therefore the fuzzy control theory be introduced to mathematical modeling for yawing system.