Modular Grid-Connected Cascaded H-Bridge Multilevel PV Inverter Using Fuzzy Proportional Integral Derivative controller

Abstract

This paper introduces a particular cascaded H-bridge multilevel photovoltaic (PV) inverter for single-or three-phase grid-connected applications. The measured cascaded multilevel topology enhances the proficiency and adaptability of PV systems. To acknowledge better use of PV modules and maximize the solar energy extraction, a dispersed most maximum power point following control plan is connected to both single-and three-phase multilevel inverters, which permits independent control of each dc-link voltage. For three-phase grid-connected applications, PV losses may introduce unbalanced supplied power, driving to unequal grid current. To comprehend this issue, The proposed controller is called Fuzzy logic proportional–integral–derivative (PID) controller. This paper provides an overview of performance conventional PI controller and Fuzzy PID controller A test three-phase seven-level cascaded H-bridge inverter has been fabricated using nine H-bridge modules (three modules for every phase).