Transient dc bias elimination of dual-active-bridge dc-dc converter with improved triple-phase-shift control

Bu, Qinglei, Wen, Huiqing, Wen, Jiacheng, Hu, Yihua, and Du, Yang (2020) Transient dc bias elimination of dual-active-bridge dc-dc converter with improved triple-phase-shift control. IEEE Transactions on Industrial Electronics, 67 (10). pp. 8587-8598.

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Abstract

A transient dc-bias current due to the voltage-second imbalance of isolated bidirectional dual-active-bridge (DAB) converters for the disturbance in line or load may result in the transformer saturation and oscillations in both sides dc currents. This article focuses on the transient dc-bias current elimination by using an improved triple-phase-shift (ITPS) control for DAB converters. The inductor peak current stress optimization is adopted in the proposed ITPS to determine the steady-state phase-shift variables. Originated from the dc-bias current model of DAB converters with the TPS control, the transient phase-shift adjustment strategy can be determined, which has the ability to improve the inductor current changing slope and shorten the settling time. Both simulation and experiments for different conditions are provided to evaluate main dynamic indexes such as the transient period, dc-bias current, and inductor current stress for three different transition cases. The proposed ITPS is proved as a promising solution in eliminating the dc-bias current, minimizing the transient current stress.

Item ID: 63850
Item Type: Article (Research - C1)
ISSN: 1557-9948
Keywords: Transient analysis, Steady-state, Inductors, Stress, Circuit faults, Bridge circuits, Magnetic flux, DC-bias current, dynamics, dual-active-bridge (DAB) converter, phase-shift control, transient
Copyright Information: © 2019 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission
Funders: Research Development Fund of XJTLU, Research Enhancement Fund of XJTLU, Suzhou Prospective Application Programme, XJTLU Key Programme Special Fund
Date Deposited: 22 Jul 2020 07:41
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090603 Industrial Electronics @ 80%
09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090607 Power and Energy Systems Engineering (excl Renewable Power) @ 20%
SEO Codes: 85 ENERGY > 8507 Energy Conservation and Efficiency > 850703 Industrial Energy Conservation and Efficiency @ 100%
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