Multi Reference Modulation Based Grid Integration of Cascaded Half Bridge MLI for Medium Voltage PV Application

In this paper different multilevel inverters (MLIs) are analyzed to find the suitable topology of MLI to apply for grid connected photo voltaic application. In this, more levels of output voltage can be produced with reduced switches, driving circuits which have been ascertained by comparative study with several existing MLI. This inverter can be apposite for grid interfacing of PV system with multi reference and single carrier scheme of switching. Simulation results are presented for 1- phase 31- level converter. The working methodology for the suggested MLI is also confirmed by suitable experimental results with both resistive and resistive-inductive loads. Finally the suitability of the topology for PV based grid integration has been confirmed with the simulation results.