Communication Dans Un Congrès Année : 2025

Comparison of 2-Level and Quasi-2-Level Topologies in a Bidirectional Isolated DC-DC Converter for MVDC Networks

Résumé

High-power DC-DC converters are essential for efficient power conversion in emerging DC networks. This paper presents a comparative analysis of bridge topologies suitable for medium-voltage (10-40 kV), isolated DC-DC converters, focusing on a 2-Level topology using series-connected SiC MOSFETs, and quasi-2-Level topologies, specifically the Flying Capacitor Converter and the Modular Multilevel Converter. Key performance indicators (KPIs) including semiconductor devices counts, voltage slew-rate during switching (dV/dt), energy stored in passive elements, and efficiency are analyzed. KPIs are evaluated across various voltage levels and two specific case studies. The Modular Multilevel Converter with quasi-2-level operation is demonstrated to be particularly appealing at higher voltage levels due to its modular design.

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hal-05239813 , version 1 (04-09-2025)

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José Andrés Aguilar Croston, Jean-Yves Gauthier, Cyril Buttay, Maryam Saeedifard, Besar Asllani, et al.. Comparison of 2-Level and Quasi-2-Level Topologies in a Bidirectional Isolated DC-DC Converter for MVDC Networks. IEEE Applied Power Electronics Conference and Exposition (APEC 2025), Mar 2025, Atlanta, GA, United States. pp.2051-2058, ⟨10.1109/APEC48143.2025.10977191⟩. ⟨hal-05239813⟩
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