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Modeling and implementation of a new ZCS interleaved bidirectional buck–boost DC–DC converter for energy storage systems

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Abstract

This paper deals with a new soft-switched interleaved bidirectional DC–DC converter for energy storage systems. The conventional interleaved bidirectional converter incorporates with an additional auxiliary circuit to attain soft turn-on operation of the main switching devices (IGBTs). The proposed converter is operated in boost and buck modes with zero current switching turn-on operation in order to have minimized turn-on losses by adding auxiliary switches, inductor and capacitors to the main interleaved converter module. The proposed interleaved converter has advantages like reduced switching power losses, device count and improved efficacy. The operating principles and theoretical analysis of the interleaved topology under buck and boost modes are presented in detail. Design simulation analysis and its experimental results were executed using 1-kW, 50-kHz laboratory prototype. The converter’s soft-switching characteristics and its performance were also demonstrated.

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Abbreviations

\(V_{C_{b}}\) :

Voltage of auxiliary capacitor \(C_{b}\)

\(i_{S_{2}}\) :

Current of the switch \(S_{2}\)

\(i_{S_{b}}\) :

Current of the auxiliary switch \(S_{b}\)

\(L_\mathrm{x}\) :

Equivalent inductance

\(L_{a}\) and \(L_{b}\) :

Auxiliary inductors

\(C_{b}\) and \(C_{a}\) :

Auxiliary capacitors

k :

Constant

\(V_{o}\) :

Load voltage

\(I_{m}\) :

Maximum input inductor current

\(P_{o}\) :

Output power

\(V_{1}\) :

Input voltage (boost mode)

\(V_{2}\) :

Input voltage (buck mode)

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Acknowledgements

This research has been supported by the Ministry of Education, Youth and Sports of the Czech Republic under the RICE – New Technologies and Concepts for Smart Industrial Systems, Project No. LO1607. One of the authors V.V.S.K.B acknowledges KIIT University, Bhubaneswar, Odisha, India, for the constant support to carry out research work in campus and abroad.

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Authors and Affiliations

  1. School of Electronics Engineering, KIIT University, Bhubaneswar, 751024, Odisha, India

    Pramod Kumar Aylapogu & Veera Venkata Subrahmanya Kumar Bhajana

  2. Regional Innovation Centre for Electrical Engineering, University of West Bohemia, Univerzitni 26, 30614, Pilsen, Czech Republic

    Veera Venkata Subrahmanya Kumar Bhajana, Pavel Drabek & Martin Jara

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  1. Pramod Kumar Aylapogu
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  2. Veera Venkata Subrahmanya Kumar Bhajana
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  3. Pavel Drabek
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  4. Martin Jara
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Correspondence to Veera Venkata Subrahmanya Kumar Bhajana.

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Aylapogu, P.K., Bhajana, V.V.S.K., Drabek, P. et al. Modeling and implementation of a new ZCS interleaved bidirectional buck–boost DC–DC converter for energy storage systems. Electr Eng 99, 1283–1293 (2017). https://doi.org/10.1007/s00202-017-0632-1

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