Fuzzy Controller for an Ipm Synchronous Generator-based Gearless Variable Speed Wind Turbine Using Fuzzy Logic Controller

In this paper we proposes a new control strategy for an interior permanent magnet synchronous generator-based(IPMSG) variable speed wind turbine. In this scheme, the requirement of the continuous rotor position is eliminated as all the calculations are done in the stator reference frame.. The direct control scheme with fuzzy logic controller (FLC) is simpler and can eliminate some of the drawbacks of traditional indirect vector control scheme. The proposed control scheme is implemented in MATLAB/SimPowerSystems and the results show that the Fuzzy controller can operate under constant and varying wind speeds. Finally, a sensorless speed estimator is implemented by using fuzzy logic controller, which enables the wind turbine to operate without the mechanical speed sensor. The simulation and experimental results for the sensorless speed estimator are presented. This scheme possesses advantages such as lesser parameter dependence and reduced number of controllers compared with the traditional indirect vector control scheme