Modeling and Vector Control of Grid-Connected Doubly Fed Induction Generator

In this work, rotor side control of single voltage source converter (VSC)-based grid-connected doubly fed induction generator (DFIG) is presented for wind energy conversion system (WECS). Modeling of DFIG in stator flux reference frame and vector control method are studied. This system provides the complete independent control of active and reactive power with only reduced rating of the rotor side converter (RSC) as it subjected to the slip times the machine rating. Field oriented vector control in stator flux reference frame is used for the controlling of this system. The simulation results for 15 kW DFIG system are carried out under steady state and dynamic changes of load torque and rotor speed in MATLAB/Simulink.