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.