Enhanced Reduced Order Model of Wind Turbines with DFIG for Power System Stability Studies

This paper presents an extension to the stability model of the doubly fed induction generator (DFIG) used for wind turbines. With the proposed extension it is possible to consider the alternating components of the rotor current and thus the variation of the converter DC-link voltage. With realistic DC-voltage responses, a more accurate modeling of crowbar switching will now be possible. The paper also presents suitable models for rotor and line side converters, as well as for the DC-link. Moreover, the paper provides simulation results not only for model verification but also for demonstrating the behavior of the DFIG and the corresponding control system during fault.