New Models of a Z-Source Inverter Built of Standard MATLAB Simulink Blocks

Abstract

In this paper, two new simulation models of a Z-Source inverter (ZSI) system are proposed. These models have been built only out of standard MATLAB-Simulink blocks. The proposed models have been developed using two sets of differential equations – for the non-shoot-through and shoot-through states – which are alternately executed, depending on the ZSI state. In the first model, this is done by alternately triggering two separate subsystems, each corresponding to one of the ZSI states. In contrast, in the second model, both ZSI states are programmed by using the same Simulink blocks, contained within a single unified subsystem : the interaction between the blocks is, however, altered based on the same trigger signal. For comparison, another model of the ZSI system has been developed in additional MATLAB SimPowerSystems toolbox. Results for various types of loads for all three models have been compared and discussed.

Mateo Bašić

Full Professor | Department of Power Electronics and Control

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture in Split, with recent research interests related to the fields of power electronics and renewable energy sources, with a special focus on energy-efficient control of inverters, battery systems, wind turbines, photovoltaic sources and self-excited induction generators in microgrids - both in island operation and in grid-tie operation.

Dinko Vukadinović

Full Professor | Department of Power Electronics and Control

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split, specialized in modern control systems for power electronic converters, electric motors, and generators. At the Power Electronics Research Laboratory, he leads experimental projects and develops advanced methods for regulating electrical machines and converters, while supervising doctoral research in these areas.