ANALYZING FUZZY CONTROL MODEL FOR VARIABLE SPEED PITCH WIND SYSTEM CONNECTED TO GRID

Wind energy has gained an increasing worldwide interest due to the continuous increase in fuel cost and the need to have a clean source of energy. The main objective design a fuzzy control Model for variable speed, pitch wind system connected to grid by using MATLAB and To analyze & compare the performance of the proposed model and compare the result with the existing one. Variable Speed wind turbines have many advantages over fixed- speed generation such as increased energy capture, operation at maximum power point, improved efficiency, and power quality. Fuzzy logic controller is employed for the control of pitch angle, real and reactive power flows of grid connected direct driven VSWT-PMSG system. The control system is done by planning the appropriate trajectories on components of the output variable vector of the system. The main advantage of the proposed method is control of the system even during the transient state as well as the high performance. The studied system includes a three-bladed horizontal wind turbine and a permanent magnet synchronous generator (PMSG) which is connected to the grid through a back to back converter and a filter. To study performance of the control strategy, a random profile of the wind speed has been used. A new nonlinear control method based on differential flatness is applied to a high-power wind energy conversion system connected to the grid is proposed in this paper. To prove the efficiency of the proposed control method, several simulation results in MatlabSimulink for a 5 MW wind turbine are presented.