Finite Control Set Applied to the Direct Power Control of a DFIG Operating Under Voltage Sags

This paper presents a finite control set applied to the direct power control for doubly fed induction generator under normal and voltage sag operation. The controller is designed by using the discretized equations of DFIG. In this case, the generator was modeled as function of reactive and active power, rotor voltage vector, and the flux variations. In this way, the future behavior of the rotor voltage is predicted by using the power error, flux variations, and the minimization of the cost function that allows us to select the optimal voltage vector. Hence, the proposed finite control set controller for direct power control will attend the power references under normal and sag operation. The results obtained in an experimental test bench validate the proposed finite control set controller for direct power control for doubly fed induction generator.