Asymmetrical Pulse-Width Modulation Strategy for Current-Fed Dual Active Bridge Bidirectional Isolated Converter Applied to Energy Storage Systems

Edivan Laercio Carvalho, Luiz Henrique Meneghetti, Emerson Giovani Carati, Jean Patric da Costa, Carlos Marcelo de Oliveira Stein and Rafael Cardoso
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Edivan Laercio Carvalho: Department of Electrical Engineering, Graduate Program in Electrical Engineering, Universidade Tecnológica Federal do Paraná-UTFPR, Pato Branco-PR 85503-390, Brazil
Luiz Henrique Meneghetti: Department of Electrical Engineering, Graduate Program in Electrical Engineering, Universidade Tecnológica Federal do Paraná-UTFPR, Pato Branco-PR 85503-390, Brazil
Emerson Giovani Carati: Department of Electrical Engineering, Graduate Program in Electrical Engineering, Universidade Tecnológica Federal do Paraná-UTFPR, Pato Branco-PR 85503-390, Brazil
Jean Patric da Costa: Department of Electrical Engineering, Graduate Program in Electrical Engineering, Universidade Tecnológica Federal do Paraná-UTFPR, Pato Branco-PR 85503-390, Brazil
Carlos Marcelo de Oliveira Stein: Department of Electrical Engineering, Graduate Program in Electrical Engineering, Universidade Tecnológica Federal do Paraná-UTFPR, Pato Branco-PR 85503-390, Brazil
Rafael Cardoso: Department of Electrical Engineering, Graduate Program in Electrical Engineering, Universidade Tecnológica Federal do Paraná-UTFPR, Pato Branco-PR 85503-390, Brazil

Energies, 2020, vol. 13, issue 13, 1-22

Abstract: This paper proposes an asymmetrical pulse-width modulation (PWM) strategy for current-fed dual-active bridge (CFDAB) converters applied to energy storage systems (ESS). The ESS application considers low-voltage and high-capacity batteries, for low-power applications, such as data centers, residential photovoltaic systems (PV), and uninterruptable power supplies (UPS). The proposed modulation permits the use of an isolation transformer with negligible leakage inductance and, therefore, avoids the use of auxiliary circuits such as snubbers, active-clamp, or resonant cells. Hence, the converter implementation is simplified. The modulation also benefits the design of the control system because the converter can be modeled and controlled using simple strategies. A straightforward, large-signal model for the battery charge mode, which is valid over all the operation range of the converter, is obtained. Also, the converter operates with a fixed dc bus voltage on both charge and discharge modes. These characteristics represent a significant advantage when the CFDAB with PWM modulation is compared with phase-shifted or frequency modulations, commonly applied in these converters.

Keywords: bidirectional converters; current-fed dual-active bridge; energy storage systems; PWM control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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