Neutral Point Clamped Transformer-Less Multilevel Converter for Grid-Connected Photovoltaic System

Transformer-less (TL) inverter topologies have elicited further special treatment in photo-voltaic (PV) power system as they provide high efficiency and low cost. Neutral point clamped (NPC) multilevel-inverter (MLI) topologies-based transformer-less are being immensely used grid-connected medium-voltage high-power claims. Unfortunately, these such NPC-MLI, full-bridge with DC bypass (FB-DCBP) suffer from the shoot-through problem on bridge legs, which affect reliability of implementation. Based previous above credits, a T type neutral (TNP)—MLI (TNP-MLI) topology called TL-TNP-MLI is presented to be an alternate can suitable PV generation systems. The suggested free legs burden, switching frequency common-mode current (CMC), leakage current. control grid interface hysteresis (HCC) strategy proposed. effectiveness proposed connected TNP-MLI different scenario has been verified through MATLAB/Simulink simulation model field-programmable gate area (FPGA)-based experimental results for 1.5 kW system.