An Analytical Model and the Comparative Simulation for Stand-alone Operated DFIG

A stand-alone operated doubly-fed induction generator (DFIG) exhibits different characteristics than those connected to grids. Therefore, this study proposes a realistic analytical model to investigate the behavior of the stand-alone DFIG, through simulations. The study examines the validity of several existing analytical models of DFIG and focuses on one in particular, which is derived from the stator and rotor voltage equations in the separate (natural) reference frame. This model is built using Matlab/Simulink conventional building blocks and simulated to explore the behaviors of a stand-alone DFIG in transient and steady-state, under no-load and linear/non-linear load conditions.