Open AccessTwo‐stage micro‐grid inverter with high‐voltage gain for photovoltaic applications
Author(s) -
Ahmed Mahrous ElSayed,
Orabi Mohamed,
AbdelRahim Omar Mohamed
Publication year - 2013
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2012.0666
Subject(s) - inductor , inverter , photovoltaic system , electrical engineering , voltage , computer science , electronic engineering , engineering
This study proposes a new two‐stage high voltage gain boost grid‐connected inverter for AC‐module photovoltaic (PV) system. The proposed system consists of a high‐voltage gain switched inductor boost inverter cascaded with a current shaping (CS) circuit followed by an H ‐bridge inverter as a folded circuit and its switches operate at line frequency. The switched inductor boost converter (SIBC) has one switch operates like a continuous conduction mode. The maximum power of the PV module is achieved through the SIBC circuit whereas the grid connection requirements are accomplished using the CS circuit with the H ‐bridge inverter. The switch of the CS circuit is controlled with a sine wave modulation control scheme. The main advantages of the new proposed system are high boosting gain, lower switching losses and reduces the ground leakage current as all H ‐bridge switches operate at the line frequency. A 120 W prototype has been built and experimentally tested. It has been found that experimental results have a good matching with the proposed analysis and simulation results.