Rotor position determination model for real-time control of the doubly-fed induction machine

The development of power electronics, electrical drives and wind turbines has allowed at increasing power of wind systems. So, limitation of mechanical stress and power disturbances has pointed out to strong demand to variable speed systems. The double fed induction machine has come to be applied as a right solution for well-defined applications within wind energy systems. In this context it was developed a model for wound rotor induction machine double fed through a static power converter, decoupling flow of active and reactive power. One four-quadrant ac-to-ac IGBT based converter is used to feed power bi-directionally to the rotor circuit. The simulation made in Saber software package and measurements allow at validating this model.