Predictive Direct Torque Control for a Squirrel Cage Induction Generator Grid Connected for Wind Energy Applications

This paper presents a model-based predictive controller for Squirrel Cage Induction Generator using a Direct Torque Control. The aim of this research is control the flux and the torque to get the maximum output power from generator in a typical wind energy application. The generator is connected to the power grid through a Back to Back Converter using a Voltage Oriented Controller technique. Thus, is possible choose how much active and reactive power could be injected on the grid. The model was derivate from generator's equations with an objective of predicting the future behavior of controlled variables. These techniques were implemented in SimPowerSystems of Matlab/Simulink. Simulation results will show the efficiency of digital controller for active and reactive power tracking and for a low level in the total harmonic distortion for the rotor current, injected by the power converter