Dynamic phasor modeling of the doubly-fed induction generator under unbalanced conditions

This paper proposes the use of the dynamic phasor approach for studying the behavior of doubly-fed induction generators during faults and unbalanced conditions. The dynamic phasor approach provides more accurate models than the quasi-stationary ones and, at the same time, is computationally more efficient than detailed EWTP models. Two contingencies are taken as examples to study the wind turbine behavior: balanced and unbalanced voltage sags. Results are compared with standard electromechanical and electromagnetical models.