Objective: This article presents a comparative study between the direct control for a Doubly-
Fed Induction Generator (DFIG) in the healthy and faulty mode.
Method: First with classical IP controller then Linear Quadratic Gaussian (LQG) controller which
propose an ensemble of Linear Quadratic Regulator and Kalman filter for the state estimation. The
developed model of the machine allows the simulation of the inter-turn short circuit in the stator.
The use of the LQG method provides very good performance for motor operation and robustness of
the control law despite the external perturbation. The performance of the control is compared to a
classical controller's PI.
Result: The obtained results demonstrate that this type of controller allows the alleviation of the mechanical
stress and it ensures good performances under fault, the continuity of this system is ensured.
Conclusion: The simulation has been carried out using a MATLAB script and the results are presented.
Keywords: Doubly fed induction generator (DFIG), PI Control, LQG controller, double flux Orientation control, short circuit fault.
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