A Design of a Redundancy-Based Cascaded Bidirectional DC-DC Converter for Improved Reliability in Energy Storage Devices

Autor(es)

Fagundes, Thales Augusto ; Fuzato, Guilherme Henrique Favaro ; Magossi, Rafael Fernando Quirino ; Oliveira, Ana Lais Rui ; Machado, Ricardo Quadros

• Tipo de documento: Artigo Científico
• Fonte: IEEE OPEN JOURNAL OF THE INDUSTRIAL ELECTRONICS SOCIETY; v. 5, p. 18-pg., 2024-01-01.

Resumo

This article proposes a redundancy-based cascaded bidirectional dc/dc converter designed to interface battery energy storage system (BESS) units. With the employment of this topology, its reliability is increased due to redundancy in power conversion, which differs from conventional structures formed by dc/dc converters that cannot process power flow when a fault occurs. Thus, the topology is provided merging the cascaded bidirectional Boost converter and cascaded bidirectional Cuk converter. Subsequently, the coupled mathematical model of the proposed topology can be readily calculated, considering all feasible (different) subcircuits according to the switching pattern. Therefore, small-signal analysis is applied to design the PI controllers, followed by a closed-loop performance evaluation using an infinity norm and stability analysis to assess the operation of the dc/dc converter in closed loop for different values of load and current references. Finally, a lab-scale prototype and a hardware-in-the-loop setup prove the effectiveness of the dc/dc converter working in various scenarios and also operating with the traditional SoC-based droop for balancing the BESS units. (AU)

• Processo FAPESP: 20/05865-3 - Equalização de dispositivos armazenadores de energia para o gerenciamento e otimização de microrredes CC que utilizam fontes alternativas de energia como fonte primária
• Beneficiário: Thales Augusto Fagundes
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/20721-4 - Sistema de interconexão de geradores distribuídos em redes de distribuição: síntese de micro grids
• Beneficiário: Ricardo Quadros Machado
• Modalidade de apoio: Auxílio à Pesquisa - Regular