Effect of Drive Train Model Simplification on the Stability of Grid-connected DFIG

Abstract

In this article, the effect of shaft modelling simplifi-cation on the stability of a grid-integrated doubly fed induction generator (DFIG) based wind energy conversion systems (WECS) is studied. The consequence of drive train parameters on stability of grid-connected DFIG is also studied. The full order model of DFIG is considered including the GSC controllers. The stability study of a grid-interfaced DFIG-based WECS is performed by modal analysis and time-domain simulations. The results obtained by using lumped-mass model of drive train shows that the results are over optimistic in stability view-point.