Modeling of grid-connected quasi-Z-source series resonant topology based microinverter

摘要

This paper describes the grid-connected isolated microconverter based on qZS network. Due to many benefits quasi-Z-source based converters are suitable for renewable energy application, in particular for the photovoltaic systems. However, there are some problems that need closer analysis before quasi-Z-source converter can be fully implemented in PV microinverters. The goal of this work is to address those problems and achieve stable performance of a microinverter based on the quasi-Z-source network in the full load profile. The simulation results confirm the feasibility of the suggested solution. Tuning process is revealed.