Modeling and Control of a DFIG-Based Wind

Turbine During a Grid Voltage Drop

Doubly-fed induction generators (DFIG) are widely

used in wind energy generation systems. During a grid voltage

drop, performance is degraded with rotor over current

deteriorating the fault-ride through (FRT) capability of the DFIG

wind-energy generation system. In this paper, a complete

mathematical DFIG model is proposed. The rotor is considered

fed by a voltage source converter whereas the stator is connected

to the grid directly. Output power and electromagnetic torque

are controlled using field-oriented control (FOC). Simulation

results show the efficiency of the controller in exploiting the

maximum power of wind.