using fuzzy logic controller and innovation switching control for increase the stability of the frequency wind turbine under maximum wind speed changes

In this paper, mechanical torque has controlled with blades angle control on a wind turbine and programmable switching mode for power electronic converter used to control the power stator output of the generator dfig. mechanical output torque control is performed with a new and original method. the optimal coefficients and also membership functions and rules governing the controlled variables are achieved by feedback from the mechanical torque output. in order to verify the results were compared with pi controller. second part was switching control modes, in this method, unlike conventional methods with a band of hysteresis is calculated error of active and reactive power and compare it with reference values, and based on an innovative planning table switching is done. in this case, the first controller output mechanical torque is given as input to the generator and then, mechanical torque using active power and reactive power output stator are made. by controlling the switching back to back converters connected to grid, stator active and reactive power output can be controlled independently. two controllers are complementary and work at the same time. wind turbine generator dfig considered in connection hypothetical grid that it is with constant frequency and power. finally, the stability of the system has been investigated with different controllers under maximum wind changes. the simulation results show its good performance is the design.

Using fuzzy logic controller and innovation switching control for increase the stability of the frequency wind turbine under maximum wind speed changes

In this paper, mechanical torque has controlled with blades angle control on a wind turbine and programmable switching mode for power electronic converter used to control the power stator output of the generator DFIG. Mechanical output torque control is performed with a new and original method. The optimal coefficients and also membership functions and rules governing the controlled variables are achieved by feedback from the mechanical torque output. In order to verify the results were compared with PI controller. Second part was switching control modes, in this method, unlike conventional methods with a band of hysteresis is calculated error of active and reactive power and compare it with reference values, and based on an innovative planning table switching is done. In this case, the first controller output mechanical torque is given as input to the generator and then, mechanical torque using active power and reactive power output stator are made. By controlling the switching back to back converters connected to grid, stator active and reactive power output can be controlled independently. Two controllers are complementary and work at the same time. Wind turbine generator DFIG considered in connection hypothetical grid that it is with constant frequency and power. Finally, the stability of the system has been investigated with different controllers under maximum wind changes. The simulation results show its good performance is the design.