Predictive Current Control Strategy with Imposed Load Current Spectrum

Abstract

A modified predictive current control strategy is presented in order to have control over the spectrum of the load current. The proposed strategy uses a model of the system to predict the behavior of the current for each possible voltage vector generated by the inverter. For that purpose, at each sampling interval, signal predictions are evaluated using a cost function that quantifies the desired system behavior. The cost function used in this work evaluates the filtered error of the load currents. The inclusion of a filter for the load error allows one to manipulate current spectra. Thus, by designing this filter appropriately, the load spectrum can be shaped.