Dynamic Phasor Modeling of the Doubly-fed Induction Generator under Unbalanced Conditions

Abstract

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 EMTP 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.