A quintuple phase shift modulation scheme in multilevel dual active bridge converter for battery energy storage system

Summary Generally, the dual active bridge (DAB) bidirectional DC‐DC converter suffers from harmonics in the high‐frequency link (HFL) conversion stage while operating under any modulation scheme. This paper proposes a quintuple phase shift (QPS) modulation scheme to suppress the harmonics under the...

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Bibliographic Details
Published inInternational journal of circuit theory and applications Vol. 51; no. 4; pp. 1665 - 1684
Main Authors Bheemraj, T. S., Karthikeyan, V., Kumaravel, S.
Format Journal Article
LanguageEnglish
Published Bognor Regis Wiley Subscription Services, Inc 01.04.2023
Subjects
Electric bridges
Electric converters
Energy storage
Harmonic distortion
harmonics
Low voltage
Microprocessors
MLDAB
Modulation
Phase shift
Power flow
QPS
THD
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Summary:Summary Generally, the dual active bridge (DAB) bidirectional DC‐DC converter suffers from harmonics in the high‐frequency link (HFL) conversion stage while operating under any modulation scheme. This paper proposes a quintuple phase shift (QPS) modulation scheme to suppress the harmonics under the whole operating range. A bidirectional auxiliary switch in the low voltage bridge produces a five‐level output, which alleviates harmonic components of HFL current. The total harmonic distortion (THD) analysis is done for various operating conditions and is compared with the conventional modulation scheme, such as single phase shift and dual phase shift. The THD can be reduced in the entire power transmission for the proposed modulation scheme by defining the suitable phase shift ratios. Also, the power flow analysis under QPS modulation is reported in this paper. To validate the proposed approach's theoretical performance, simulation results are obtained under different operating conditions and verified with experimental results. The QPS modulation is implemented using the Spartan 3AN FPGA processor. The paper proposes a quintuple phase shift (QPS) modulation scheme to suppress the current harmonics in high‐frequency link (HFL) conversion stage of multilevel dual active bridge. The total harmonic distortion (THD) analysis of proposed modulation scheme is compared with single phase shift and dual phase shift modulation schemes, and the power flow analysis under QPS modulation is reported. Less than 5% THD is achieved over the entire operating range for proposed QPS modulation scheme, and the results are validated experimentally.
ISSN:0098-9886
1097-007X
DOI:10.1002/cta.3508