Impact of DFIG stator flux transients on power system small signal stability

Stator flux transients can affect the stability of small signals in power systems.An 8-order model was developed to describe the double fed induction generator(DFIG) electromagnetic process with formula for calculating the small signal stability.Lyapunov eigenvalue theory is used to study a single DIFG-line-infinite bus system.The results show that the stability boundary of the 6-order model system is more optimistic than the 8-order model system for various controller parameters and different the transmission line reactances.The simplified 6-order model is not useful for system stability analyses.