Abstract
Three-phase voltage source inverter (VSI) with LC output filter has been widely applied for power conversion. The control scheme requires to withstand plant parametric variations, load uncertainty, and nonlinearity, making it sophisticated for controller design. This paper proposed a dichotomy enhanced model predictive control scheme for three-phase stand-alone VSI with constant switching frequency and a low sampling frequency (100μs). The dichotomy enhanced algorithm extended the available set for the terminal vector from the apexes of the hexagon into a complete circle. The number of vectors evaluated each sampling step can be adjusted according to the computation capability of the digital processor. This algorithm can be easily extended to the other topological system. Both simulation results and experimental results validated the effectiveness of the proposed control scheme.
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