Hybrid Petri network sliding mode control of wind turbine for maximum power point tracking

This paper presents a new design of hybrid Petri net sliding mode control (PNSMC) applied to reach the maximum power point tracking (MPPT) of a variable speed wind energy conversion system. To solve the main and major undesired phenomenon faced by conventional sliding mode control, the high frequency oscillations known as chattering, the design of a hybrid controller based on Petri network sliding mode control (PNSMC) is proposed, in which a Petri network controller replaces the discontinuous part of the classical sliding mode control law. The new hybrid control law has been tested in Simulink/Matlab environment. Simulation results of the proposed control scheme present good dynamic and steady-state performance compared to the classical SMC with respect to the reduction of chattering phenomenon.