Abstract

$A$ grid-connected wind turbine system is considered for power system studies. The wind turbine with doubly fed induction generator (DFIG) is modeled in MATLAB/Simulink. The fifth-order system is divided into two third-order systems representing in direct and quadrature components. Sliding mode controllers are designed for the nominal system to output rotor voltages. The Super-twisting scheme is adopted to eliminate the chattering in the switching relay. A three-phase fault on the grid side with 150 msec. duration time is applied to test the reliability of the closed-loop system. Computer simulation results show that the control system effectively clears the fault and maintains the stability of the system.

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