Simplified model of doubly fed induction generator in normal operation

This paper presents comparative study of reduced order models (ROMs) of a doubly fed induction generators (DFIG) for normal operation. A DFIG with detailed mechanical, electrical and control components is the basis for model development. Two control strategies, the maximum power point tracking and set point tracking, are considered for normal operation. In these cases, the dynamic model of DFIG can be seen as a nonlinear input-output system. Dominant pole based modal analysis is applied to identify the importance of the states. Thus, a simplified nonlinear DFIG model is obtained by neglecting the less important states. Simulations and comparisons are carried out to validate the ability of ROM in matching the active power generated by the detailed DFIG model.