DESIGN AND IMPLEMENTATION OF ZETA MICRO-INVERTER FOR SOLAR PV APPLICATION

摘要

Microinverter is attached on each photovoltaic (PV) panel, i.e., Microinverter is improving due to increased energy harvest from the solar panel. This paper proposes a design and implementation of a single stage ZETA Microinverter for solar PV applications. This method is based on ZETA converter, with high frequency (HF) transformer isolation and a single low side switch on the primary side of transformer. The proposed inverter is its ability to work in Continuous Conduction Mode (CCM) over a wide load range, which results in reduced current stress, components rating and high efficiency. All the secondary switches operate at line frequency, thus reducing switching losses. In order to maximize the output of a PV system, the maximum power point (MPP) is used. A 60 W Microinverter was designed, developed, and tested.