Small signal stability analysis considering grid-connected wind farms of DFIG type

In this paper, small signal stability analysis considering grid-connected wind farms of doubly-fed induction generator (DFIG) type is conducted. A simplified and practical DFIG model is presented firstly, and the stator flux-oriented vector control based method is employed to implement stator active and reactive powers control in modelling rotor-side converter. The power system small signal stability analysis is then carried out to explore and exploit the essential impacts on the existing power grid by eigenvalue analysis for a specific test system. Finally, numerical results demonstrate the validity of the proposed model and method, especially some conclusions and comments of interest are made.