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The development of distributed energy resources has positioned multi-terminal power supply systems as dominant model in distribution networks, typically featuring a structure that is “designed for closed-loop configurations but operated in open-loop mode”. However, short-term outages during maintenance and the increasing demand for uninterrupted power supply pose significant challenges. To address this, distribution networks must enable load-transfer through loop-closing operations for continuous power supply. This paper proposes a loop-closing device based on a dynamic reconfiguration converter (DRC-LCD) to facilitate flexible loop-closing despite voltage mismatches across buses. By enabling flexible transitions between parallel current control (PCC) and series voltage control (SVC) modes, the DRC-LCD enhances converter functionality and utilization. The operating principles of the DRC-LCD are analyzed under various conditions, and its control and switching strategies are designed. Simulations in a 10kV distribution network validate the topology and flexible loop-closing control of the DRC-LCD.

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Flexible Loop-Closing and Load-Transfer Control Strategy for Distribution Network Based on Dynamic Reconfiguration Converter

  • 会议论文

  • 发表日期：

    2026年

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  • Jiaxuan Hu,
  • Jinmu Lai,
  • Xin Yin,
  • Xianggen Yin,
  • Fan Xiao

摘要

The development of distributed energy resources has positioned multi-terminal power supply systems as dominant model in distribution networks, typically featuring a structure that is “designed for closed-loop configurations but operated in open-loop mode”. However, short-term outages during maintenance and the increasing demand for uninterrupted power supply pose significant challenges. To address this, distribution networks must enable load-transfer through loop-closing operations for continuous power supply. This paper proposes a loop-closing device based on a dynamic reconfiguration converter (DRC-LCD) to facilitate flexible loop-closing despite voltage mismatches across buses. By enabling flexible transitions between parallel current control (PCC) and series voltage control (SVC) modes, the DRC-LCD enhances converter functionality and utilization. The operating principles of the DRC-LCD are analyzed under various conditions, and its control and switching strategies are designed. Simulations in a 10kV distribution network validate the topology and flexible loop-closing control of the DRC-LCD.