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Analysis of AC link topologies in non-isolated DC/DC triple active bridge converter for current stress minimization.

Hebala, Osama M.; Aboushady, Ahmed A.; Ahmed, Khaled H.

Authors

Osama M. Hebala

Ahmed A. Aboushady

Khaled H. Ahmed



Abstract

This paper presents analysis of the non-isolated DC/DC triple active bridge (TAB) converter under various purely inductor-based AC link topologies. The objective of the analysis is to find the topology that incorporates the least value of the AC link inductors which leads to reduced converter footprint in addition to minimum internal current stresses. Modelling of the TAB under each of the different topologies is presented in per unit expressions of power transfer and reactive power assuming fundamental harmonic analysis. The power expressions are used to calculate the inductor values necessary to achieve same rated power transfer of Dual Active Bridge (DAB) converter for the sake of standardizing comparison. On this basis, the topology requiring the least value of interface inductors, hence lowest footprint, is identified. Furthermore, based on phase shift control, particle swarm optimization (PSO) is used to calculate optimal phase shift ratios in each of the proposed topologies to minimize reactive power loss (hence current stress). The topology with minimum stresses is therefore identified and the results are substantiated using a Matlab-Simulink model to verify the theoretical analysis.

Start Date Nov 5, 2017
Publication Date Dec 14, 2017
Electronic ISSN 2572-6013
Publisher Institute of Electrical and Electronics Engineers
Article Number 8191132
Pages 608-613
Series ISSN 2572-6013
ISBN 9781538620960
Institution Citation HEBALA, O.M., ABOUSHADY, A.A. and AHMED, K.H. 2017. Analysis of AC link topologies in non-isolated DC/DC triple active bridge converter for current stress minimization. In Proceedings of the 6th IEEE international renewable energy research and applications conference (ICRERA 2017), 5-8 November 2017, San Diego, USA. New York: IEEE [online], article number 8191132, pages 608-613. Available from: https://doi.org/10.1109/ICRERA.2017.8191132
DOI https://doi.org/10.1109/ICRERA.2017.8191132
Keywords AC link; Current stress; Particle swarm optimization (PSO); Reactive power; Triple active bridge (TAB)

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