Second order sliding-mode for direct power control of doubly-fed induction generator under dips voltage
Djilali Kairous, Rene Wamkeue and Mohand Ouhrouche
Université du Québec en Abitibi, Canada
: J Electr Eng Electron Technol
Abstract
This study proposes a direct power control (DPC) strategy for a grid-connected doubly-fed induction generator (DFIG) with slip power recovery. The control design, based on the second-order sliding modes (SOSM) is adopted to control both converters rotor side converter (RSC) and the grid side converter (GSC) at a fixed switching frequency. The super twisting algorithm is adopted on Low-Voltage-Ride Through (LVRT) scheme for improving the behavior of the DFIG under fault and to smooth the power injected in the grid power. Moreover, the proposed control strategy presents attractive features such as chattering-free behavior (no extra mechanical stress), finite reaching time and robustness with respect to external disturbances (grid) and unmodeled dynamics (generator). The effective of the proposed control strategy is verified by the simulation results of a 200 W DFIG system. Representative results evidence both the high dynamic performance and the superior robustness achieved with proposed control scheme.
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