Controle preditivo de conjunto finito para inversores de fonte dividida (Split-Source) com quatro pernas

Abstract

The Split-Source Inverter (SSI) was recently proposed as an alternative to the commonly used Inverter Source Inverter (Z-Source Inverter). This topology requires the same number of active semiconductor switches as a conventional inverter, three additional diodes, and has eight switching states for the three-legged inverter and sixteen switching states for the four-legged inverter. There are several methods for modulating an inverter, these methods have different performances, advantages and disadvantages. This work presents the development of the predictive control of finite set applied to SSI with four legs. For this configuration, two active switches are added in order to allow zero sequence voltage control for unbalanced loads, with sixteen switching states. The proposed controller executes a discrete model to predict the future behavior of the currents and voltages of the input and output stages for each switching state, so the control action is defined by minimizing an appropriate cost function. Finally, simulation results are presented to demonstrate the performance of the controller studied.