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Type: Artigo de periódico
Title: Micro-inverter for integrated grid-tie photovoltaic module using resonant controller
Author: Gazoli, JR
Villalva, MG
Ruppert, E
Abstract: Two-stage isolated converters for photovoltaic (PV) applications commonly employ a high-frequency transformer (HFT) on the DC-DC side, submitting the DC-AC inverter switches to high voltages and forcing the use of insulated-gate bipolar transistors instead of low-voltage and low-loss metal-oxide-semiconductor field-effect transistors. This paper shows the modeling, control and simulation of a single-phase full-bridge inverter with HFT that can be used as part of a two-stage converter with transformerless DC-DC side or as a single-stage converter (simple DC-AC inverter) for grid-connected PV applications. The inverter is modeled to obtain a small-signal transfer function used to design the P+Resonant current control regulator, whose main advantages are the simplicity for implementation in single-phase systems and zero steady state error with sinusoidal current. A high-frequency step-up transformer results in low-voltage switches and better efficiency compared with converters in which the transformer is used on the DC-DC side. Simulations and experimental results with a 200-W prototype are shown. Copyright (c) 2013 John Wiley & Sons, Ltd.
Subject: grid-connected
full-bridge inverter
high-frequency transformer
P plus Resonant
Country: EUA
Editor: Wiley-blackwell
Rights: fechado
Identifier DOI: 10.1002/etep.1729
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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