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Communication Dans Un Congrès Année : 2021

Optimal Sizing on a Mission Profile of Isolated NPC DC-DC Converters using 3.3 kV SiC MOSFETs for Power Electronic Traction Transformers

Florent Morel
Philippe Ladoux
Piotr Dworakowski

Résumé

Multilevel converters, known as power electronic traction converters (PETT), are foreseen to replace bulky traditional on-board low frequency transformers (LFT) and two-level rectifiers in railway rolling stock. In addition to volume and weight reduction, a gain in the efficiency can be expected. This paper focuses on the isolated DC/DC conversion stage within the PETT, realised by a resonant converter, with 3-level NPC half-bridge primary and 2-level full-bridge secondary. Design is optimised both at nominal power and on a typical mission profile for a regional application. The comparison is carried out for 15 kV/16.7 Hz infrastructure and 2 MW PETTs using 3.3 kV SiC MOSFETs and nanocrystalline core transformers. The best MFT designs are achieved at 4 kHz when optimised on a mission profile and at 6 kHz when sized at rated power. A reduction of 13 % of the total energy loss on a typical journey can be obtained by optimising the design of the DC/DC converter on a mission profile rather than at nominal power.
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Dates et versions

hal-03277739 , version 1 (05-07-2021)

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  • HAL Id : hal-03277739 , version 1

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Caroline Stackler, Florent Morel, Philippe Ladoux, Alexis Fouineau, François Wallart, et al.. Optimal Sizing on a Mission Profile of Isolated NPC DC-DC Converters using 3.3 kV SiC MOSFETs for Power Electronic Traction Transformers. PCIM Europe digital days 2021: International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, May 2021, Virtual event, Germany. ⟨hal-03277739⟩
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