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Due to their high power density and bidirectional energy flow, DAB DC-DC converters are prevalent in UPS energy conversion systems. This article introduces a novel cascaded converter combining DAB with SCB. It achieves 400V-48V voltage reduction for 48V DC bus powering batteries and 48V-400V boost for 400V DC bus. The article focuses on analyzing and discussing the SCB-DAB cascade and its control strategies. A 400V-48V, 1000W converter was built on PSIM, with experimental results validating the joint control strategy's theoretical analysis.

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A Two Stage Bidirectional DC-DC Converter for DC Grid Application

  • 会议论文

  • 发表日期：

    2025年

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  • Ruoxin Wen,
  • Xiangou Zhu,
  • Meng Li

摘要

Due to their high power density and bidirectional energy flow, DAB DC-DC converters are prevalent in UPS energy conversion systems. This article introduces a novel cascaded converter combining DAB with SCB. It achieves 400V-48V voltage reduction for 48V DC bus powering batteries and 48V-400V boost for 400V DC bus. The article focuses on analyzing and discussing the SCB-DAB cascade and its control strategies. A 400V-48V, 1000W converter was built on PSIM, with experimental results validating the joint control strategy's theoretical analysis.