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Título:	Operating Principle and Performance Optimization of a Three-Level NPC Dual-Active-Bridge DC-DC Converter
Autor/a:	Filbà Martínez, Àlber; Busquets Monge, Sergio; Nicolás Apruzzese, Joan; Bordonau Farrerons, José
Otros autores:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. GREP - Grup de Recerca en Electrònica de Potència
Abstract:	© 1982-2012 IEEE. Aiming to improve the performance features of conventional two-level dual-active-bridge (DAB) converters, this paper presents a three-level neutral-point-clamped (NPC) DAB dc-dc converter. A general modulation pattern is initially defined, the dc-link capacitor voltage balancing is analyzed in detail, and a proper balancing control is designed. Then, a set of decoupled optimization problems is formulated as a function of the available modulation degrees of freedom to minimize the predominant converter losses. Finally, a simple and practical specific modulation strategy is provided, resembling the optimum solutions. The good performance of the proposed three-level NPC DAB converter operated with the proposed modulation strategy and voltage balancing control is verified through simulation and experiments. The capacitor voltage balancing can be guaranteed for all operating conditions. In addition, it is concluded that the multilevel topology provides benefits compared with the conventional two-level DAB converter.
Materia(s):	-Àrees temàtiques de la UPC::Enginyeria electrònica -Electric current converters -DC-to-DC converters. -Active neutral point clamped -bidirectional dcdc converter -capacitor voltage balancing -dual active bridge -efficiency optimization -multilevel converter -Convertidors continu-continu -Convertidors de corrent elèctric
Derechos:	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Tipo de documento:	Artículo - Versión publicada Artículo
Editor:	Institute of Electrical and Electronics Engineers (IEEE)
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