Performance analysis of grid connected modified z-source high step up inverter for solar photovoltaic system

Abstract

The modified Z-source inverters, which ensure better power conversion in multiple voltage levels to achieve build on power quality, improved electromagnetic compatibility, voltage boosting and minimum switching losses. For the purpose of comparison, examination of existing Z-source inverter topologies under different switching schemes were made, and new modified high step up Z-source inverter topologies are proposed. Proposed inverter with maximum constant boost switching scheme is employing third harmonic injection for better voltage boost inversion. A new Z-source network-based DC/AC converter topology is carried out and compared with other existing Z-source inverter-based DC/DC converters to be acquired at the front side of the solar PV power supply system with maintaining constant output voltage and fed to grid interconnection.