FCS-MPC strategy for a five-phase voltage source inverter using maximum load current constraint

Abstract

The paper introduces an examination of finite control set model predictive current control for five-leg voltage source inverter. A Matlab/Simulink model for the of finite control set model predictive current control based on cost function reduction, with load current limitation as a new control algorithm approach. The algorithm chooses one from 32 switching states that produce least error between the desired currents and the predicted currents; the algorithm applies the selected switching control signals as a command to the inverter switches. The proposed algorithm also excludes any switching state that gives currents above the desired values. Subsequently the system response is improved with the reduction of overshoots and deviations from reference. The robustness of the model is tested by applying balanced reference currents with unbalanced load, and a step change in reference currents.