Bidirectional DC-DC Converter With High Voltage Step-Up/down Ratio and Voltage Balance Capability for the Interconnection of Unipolar and Bipolar DC Microgrids

IF 5.2 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Industry Applications Pub Date : 2026-09-01 Epub Date: 2026-01-20 DOI:10.1109/TIA.2026.3655649

V. Fernão Pires;Armando Cordeiro;Daniel Foito;Joaquim Monteiro;A. J. Pires

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Abstract

The importance of DC microgrids is growing in the realm of the today’s electrical energy distribution networks. When it comes to the configuration of DC microgrids, several options exist. Yet, two structures have emerged as the most widely adopted: unipolar and bipolar DC microgrids. Consequently, their interconnection could be crucial for various applications. Given that these microgrids can operate at significantly different voltage levels, interconnection must account for this variation. Accordingly, this paper introduces a novel bidirectional DC-DC converter with a high voltage step-up/down ratio for interconnecting these two DC microgrids. The converter boasts a non-isolated configuration, enabling the transfer of energy between DC microgrids while simultaneously supporting the balance of the bipolar infrastructure. Results from the experimental tests obtained from a laboratory prototype showing the capability to transfer energy in both directions are presented. The findings indicate that the proposed solution aligns with the anticipated outcomes.

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单极和双极直流微电网互联中具有高电压升压比和电压平衡能力的双向DC-DC变换器

在当今的电力分配网络领域，直流微电网的重要性越来越大。当涉及到直流微电网的配置时，存在几种选择。然而，两种结构已经成为最广泛采用的：单极和双极直流微电网。因此，它们的互连对于各种应用可能是至关重要的。考虑到这些微电网可以在显著不同的电压水平下运行，互联必须考虑到这种变化。为此，本文提出了一种具有高升压/降压比的新型双向DC-DC变换器，用于实现两个直流微电网的互联。该转换器具有非隔离配置，能够在直流微电网之间传输能量，同时支持双极基础设施的平衡。从实验室原型得到的实验测试结果表明，在两个方向上传递能量的能力。调查结果表明，提出的解决方案符合预期结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Industry Applications 工程技术-工程：电子与电气

CiteScore

9.90

自引率

9.10%

发文量

747

审稿时长

3.3 months

期刊介绍： The scope of the IEEE Transactions on Industry Applications includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.