Nonlinear control of the doubly fed induction generator used with wind turbine for an isolated grid

This work deals with the control of the wind energy conversion system (WECS) equipped with two doubly-fed induction generators (DFIG). The main generator is controlled in order to keep the voltage and the frequency in the rates values. The second generator is connected when the power demand increase. But, before the connection, with the first generator, synchronization is done. After that, the system is switched on the power control. All controllers are designed using the Lyapunov theory. The simulation results confirm widely the feasibility and the effectiveness of the control are propose.