Predictive Control of Multi-Level Single Phase Microinverter

Abstract

this paper presents a model predictive control (MPC) system for multi-level microinverter operated for the applications of module-based Photovoltaic (PV) configurations. A microinverter topology consists of switched capacitor (SC) networks, boost converter and single-phase inverter; all are integrated in one power stage and connected to single PV module. In this paper, a model predictive control system is introduced to reduce the steady state error of the grid-injected current and assure harvesting the maximum power from the PV module. In addition to enhance the response time during the transient condition and reduce the total harmonic distortion (THD) without using any modulation schemes. The proposed control on the multilevel microinverter topology is verified using MATLAB-Simulink and OPAL-RT LAB tools.