Sliding mode control for voltage source converter applied to wind energy systems

This paper focuses on a sliding mode power controller (SMPC) of a three-phase grid-connected voltage source converter (VSC). The proposed control scheme aims at regulating the DC-link voltage of the converter and precisely tracking arbitrary power references, in order to easily control the system´s power factor. Measures are also proposed to reduce the chattering effects inherent to SMC. Simulations performed under Matlab/Simulink validate the feasibility of the designed SMPC. Simulation results on a 1kVA grid-connected VSC under normal and faulted grid voltage conditions demonstrate good performance of the SMPC in terms of robustness, stability and precision.