Feedback Linearization Based Model Predictive control of Rotor Speed of DFIG-WT

In this work, full order nonlinear model of Wind Turbine Doubly-Fed Induction Generator (DFIG-WT), including stator dynamics has been considered. Nonlinear Multi-Input-Multi-Mutput (MIMO) feedback linearization controller has been designed to control the rotor speed of Doubly-Fed Induction Generator (DFIG) in Wind Energy Conversion System (WECS). The desired states are chosen to drive the system at optimum rotor speed for maximum power point tracking. Due to unpredictable nature of wind speed, the rotor may fail to retain the optimal speed. Model Predictive Controller (MPC) with output constrain has been designed for the rotor side converter to ensure that the rotor retain the optimal speed for all operating points. It also improves the transient state of the rotor speed.