Control of doubly fed induction generator with PWM inverter

The doubly-fed induction generator (DFIG) is based on a wound-rotor induction machine. The stator and the rotor of this induction machine are both connected to an electrical source hence the name doubly fed. In wind energy conversion systems, DFIG with a back-to-back converter is an extensively utilized system. This machine has been the subject of several scientific researches, especially its application in wind energy. This thesis focuses on the control of the Double-Feed Induction Machine by PI Regulator and Fuzzy Logic Regulator Techniques. After presenting the mathematical models of the machine and the converter in the three-phase frame then in the two-phase frame using the Clarke and Park transformations, the vector control of the machine was approached by the orientation of stator flux. A decoupled control of active and reactive power is synthesized employing PI controllers to control the power flowing between the DFIG stator and the grid. Using a fuzzy logic regulator instead of a PI improves overall robustness and tracking performance when dealing with uncertainties. Matlab/SIMULINK software is used to display simulation results for different operating modes.