5th order Modeling, Control and Steady-State Validation of Wind Turbine Based on DFIG

With the high penetration of power electronics-based wind farms being integrated into power grids, proper modeling and control of large wind turbines is a prominent challenge in modern power systems. Thus, accurate mathematical modeling of the Doubly-fed induction generator (DFIG) along with its control is desperately needed. In this paper, modeling, control, and steady-state validation of a 5th order model of DFIG is presented. A vector control scheme is developed for the stator side and rotor side converters to keep constant DC link voltage and to capture maximum power from the wind. The d-q synchronous coordinate system is utilized to derive 5th order DFIG model in which the q-axis of the rotating coordinate system rotates at the nominal grid frequency. Stator flux, rotor flux, and rotor speed were selected as state variables for state space representation of the DFIG model. Experimentally, the simulations are done in EMTDC/PSCAD and the results were carried out on 1.73 MVA DFIG-based Industrial Wind Turbine data and then validate it with the actual one.