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Embedded Switched Z-Source Multilevel Inverter for Grid Interfaced Photovoltaic SystemsDIVYA, T.   , RAMAPRABHA, R. |
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Author keywords
bridge circuits, DC-AC power converters, power grid, pulse width modulation, solar energy
References keywords
inverter(14), source(9), control(8), switched(7), energy(7), electronics(7), analysis(7), power(6), photovoltaic(6), phase(6)
Blue keywords are present in both the references section and the paper title.
About this article
Date of Publication: 2022-08-31
Volume 22, Issue 3, Year 2022, On page(s): 43 - 52
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2022.03005
Web of Science Accession Number: 000861021000005
SCOPUS ID: 85137696035
Abstract
The modeling and the implementation of the embedded switched z-source type cascaded multilevel inverter for photovoltaic (PV) interfaced applications have been presented. With the ability to draw continuous current with an inherent filtering capability, the embedded switched z-source type inverter provides a single-stage conversion with a high output gain which makes it suitable for PV arrays with a low voltage rating. By applying a modular cascading method with a reduced number of H-bridge the multilevel inverter (MLI) is designed for a series-parallel connected PV array. It is controlled using the basic multicarrier PWM technique and synchronized with the grid. With the derived design equations for each mode, its stability has been analyzed and compared for different duty cycles. The developed MLI connected with a PV array has been simulated with the idea of reducing the impact of partial shading by using shorter series of strings, providing a high gain conversion with lower stress across the components. A prototype of the MLI has been tested to give a power rating of 2 kW and the results from both the simulation and the hardware have been discussed. |
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
All rights reserved: Advances in Electrical and Computer Engineering is a registered trademark of the Stefan cel Mare University of Suceava. No part of this publication may be reproduced, stored in a retrieval system, photocopied, recorded or archived, without the written permission from the Editor. When authors submit their papers for publication, they agree that the copyright for their article be transferred to the Faculty of Electrical Engineering and Computer Science, Stefan cel Mare University of Suceava, Romania, if and only if the articles are accepted for publication. The copyright covers the exclusive rights to reproduce and distribute the article, including reprints and translations.
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Disclaimer: Whilst every effort is made by the publishers and editorial board to see that no inaccurate or misleading data, opinions or statements appear in this journal, they wish to make it clear that all information and opinions formulated in the articles, as well as linguistic accuracy, are the sole responsibility of the author.
