The Design Of Pitch Control For Wind Turbine Based On Fuzzy PID Algorithm

Wind energy is a form of the ubiquitous natural resources, it is all over the world, regardless of topography are present, the development of wind energy with respect to the lower cost of thermal power, hydropower and nuclear power, better economy. With increasing wind power proportion of all power generation systems, wind speed does not directly affect the stability of the change of wind power systems to the grid power output, and active changes easily lead to changes throughout the grid frequency, frequency deviation compared large will cause people’s production and life are affected, resulting in unnecessary economic losses and electrical accidents. Therefore, to ensure the stability of the wind turbine power output of the entire national economy has a significant role.First determine the overall structure of the controller, using a two-dimensional velocity model control structures, fuzzy control system block diagram drawn. Next is the actual amount of blur process in order to establish the fuzzy control rule table, the overall draw this design fuzzy rules. Procedure as follows:If the rotational speed of the turbine size offset value is large, that we should make changes in the wind turbine pitch angle values large number of options, this can very quickly suppress error speed wind turbine size, to achieve rapid control unit output smoothness; if the rotational speed of the offset value is not size, that we should make the wind turbine pitch angle values select a small number of changes, this can reduce the size of the overshoot and ensure smooth operation of the system.Now commonly used pitch control system, changes to the aerodynamic performance of wind turbine blades of wind turbines on the basis of change in pitch angle on the blades and adjust the force of the machine, Under the smooth wind turbine active power output guarantee and special circumstances can paddle smoothly.This topic is based on permanent magnet synchronous wind turbine, by analyzing the control method of permanent magnet synchronous wind turbine power output, thus study designed to fuzzy control algorithm for controlling principle controller using the corresponding control strategy, and ultimately through a comprehensive simulation analysis to verify the controller designed for the entire wind turbine output power control and effective application.