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Power Converter Design Based on RTDS Implementation for Interconnecting MVDC and LVDC

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Abstract

In this paper, an isolated bidirectional dual active bridge (DAB) converter for interconnecting MVDC and LVDC is proposed. In order to resolve the existing problem of AC distribution such as increasing large-capacity digital loads and distributed generations (DGs), the technology for DC distribution is being studied in Korea. The proposed DAB converter can secure the galvanic isolation for the MV side and the LV side, and direct connection between the extra-high voltage DC distribution and the DC consumer is possible. To develop a 10-level DAB converter for connection to MVDC, a mathematical model for a zero voltage switching (ZVS), a reactive power characteristic, and an inductor design with minimum current ripple is presented. In addition, to verify the validity of the proposed model, software in the loop simulation (SILS) and hardware in the loop simulation (HILS) simulations were used to derive results similar to the actual system, and the accuracy was verified. Finally, economic feasibility analysis of the proposed model and actual system was conducted in terms of research investment cost in Korea.

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Acknowledgements

This research was supported by research funds of mokpo national university in 2021.

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Authors and Affiliations

  1. Department of Electrical Engineering, Mokpo National University, Muan-gun, Korea

    Dong-Sub Kim

  2. Smart Power Distribution Laboratory, KEPCO Research Institute, Munji-ro, Korea

    Seok-Woong Kim & Hak-Ju Lee

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  1. Seok-Woong Kim
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  2. Hak-Ju Lee
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  3. Dong-Sub Kim
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Correspondence to Dong-Sub Kim.

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Kim, SW., Lee, HJ. & Kim, DS. Power Converter Design Based on RTDS Implementation for Interconnecting MVDC and LVDC. J. Electr. Eng. Technol. 17, 1751–1760 (2022). https://doi.org/10.1007/s42835-022-01002-9

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  • DOI: https://doi.org/10.1007/s42835-022-01002-9

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