Trends on Predictive Control Schemes for Impedance Source Converters

Abstract

This paper presents the recent trends on application of model predictive control (MPC) schemes for impedance source converters. Impedance source inverters is a class of dc/ac inverters, known as z-source/quasi-z-source (ZSI/qZSI), which can freely step up/down the source voltage. This characteristics of ZSI/qZSI make them a potential solution as a power electronic interface for grid interactive photovoltaic sources. The downside of the ZSI/qZSI is the requirement of the complex control schemes and modulation strategies to take full advantage of their features at the grid-edge. Predictive control schemes are well-suited for multi-objective control problems without requirement of modulation stage, and as a result MPC can be leveraged to take full advantages of ZSI/qZSI in reliable, robust, and simple manner. The recent uptick number of published research articles on MPC schemes for ZSI/qZSI is a solid evidence for this paradigm. This paper provides an existing survey of MPC approaches for ZSI and qZSI operating in grid-connected and islanded modes of operation. Finally, the research roadmap on this paradigm will be provided.