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Electrical Engineering

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11-09-2023 | Original Paper

Design and implementation of a chaotic unipolar sine-pulse modulation technique for a transformerless single-phase grid-connected photovolatic inverter

Authors: S. Kraiem, M. Hamouda, J. Ben Hadj Slama

Published in: Electrical Engineering | Issue 1/2024

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Abstract

Transformerless grid-connected inverters for photovoltaic (PV) applications provide several advantages such as reduced cost and volume as well as an increased efficiency. However, the removal of the transformer gives rise to several problems related to leakage currents and electromagnetic interferences (EMI). This paper presents different chaotic unipolar sine-pulse width modulation (C-USPWM) techniques for a transformerless grid-connected PV inverter based on parameter selection. The main objective behind this proposed chaotic modulation technique is to reduce the conducted EMI without worsening the power quality and the common-mode voltage (CMV). The method is validated through numerical simulations and experimental tests carried out on laboratory prototype of an optimized H5 inverter (oH5). The obtained results showed its superiority to the conventional unipolar sine-pulse width modulation (USPWM). We showed also that the appropriate parameter selection of the C-UPSWM could advantageously combine an improved EMI performance and an efficient control, making it possible to deliver a significant reduction of the peaks’ amplitudes in the frequency spectrum of the common-mode (CM) voltage.

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Title: Design and implementation of a chaotic unipolar sine-pulse modulation technique for a transformerless single-phase grid-connected photovolatic inverter
Authors: S. Kraiem
M. Hamouda
J. Ben Hadj Slama
Publication date: 11-09-2023
Publisher: Springer Berlin Heidelberg
Published in: Electrical Engineering / Issue 1/2024
Print ISSN: 0948-7921
Electronic ISSN: 1432-0487
DOI: https://doi.org/10.1007/s00202-023-02003-1

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