Comparison of Interleaving Methods of Parallel Connected Three-Level Bi-Directional Converters

Hae-In Kim, Su-Hwan Kim, Seung-Woo Baek, Hag-Wone Kim, Kwan-Yuhl Cho and Gil-Dong Kim
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Hae-In Kim: Department of Control and Instrumentation Engineering, Korea University of Transportation, Chungju 27469, Korea
Su-Hwan Kim: Department of Control and Instrumentation Engineering, Korea University of Transportation, Chungju 27469, Korea
Seung-Woo Baek: Department of Control and Instrumentation Engineering, Korea University of Transportation, Chungju 27469, Korea
Hag-Wone Kim: Department of Control and Instrumentation Engineering, Korea University of Transportation, Chungju 27469, Korea
Kwan-Yuhl Cho: Department of Control and Instrumentation Engineering, Korea University of Transportation, Chungju 27469, Korea
Gil-Dong Kim: Propulsion System Research Department, Korea Railroad Research Institute, Uiwang 16015, Korea

Energies, 2021, vol. 15, issue 1, 1-19

Abstract: The voltage and current ripples in the three-level bi-directional converter (TLBC) can be reduced by an interleaving technique that controls a phase difference between the modules of power converter. On the other hand, the inductor current ripple in TLBC is increased due to the circulating current between the modules. In this paper, the effects of two interleaving methods on a two-phase TLBC, Z-type and N-type, are investigated and compared. In particular, capacitor current ripple, and voltage ripple are compared by two interleaving methods verified through Powersim (PSIM) simulation.

Keywords: three-level bi-directional converter (TLBC); interleaving control; capacitor current ripple; parallel 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: 2021
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