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<p>A key challenge in DC microgrids is to effectively share current among the DC sources while maintaining the DC bus voltage within specified limits. In particular, when the line resistance mismatch is significantly mismatched, conventional strategies degrade performance or require complex control loops or calculations. To address these issues, this paper proposes an adaptive linear droop strategy with distributed secondary control. The proposed approach incorporates droop gain and voltage reference controllers to enhance performance in current sharing and DC bus voltage regulation without complex control loops and calculations. The validation of the proposed strategy is demonstrated through comprehensive simulation and experiment results across various scenarios.</p>

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An Adaptive Linear Droop Strategy for Current Sharing Enhancement in DC Microgrid with Mismatched Line Resistance

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • Hyojin Ahn,
  • Hyeongjun Park,
  • Youngjong Ko

摘要

A key challenge in DC microgrids is to effectively share current among the DC sources while maintaining the DC bus voltage within specified limits. In particular, when the line resistance mismatch is significantly mismatched, conventional strategies degrade performance or require complex control loops or calculations. To address these issues, this paper proposes an adaptive linear droop strategy with distributed secondary control. The proposed approach incorporates droop gain and voltage reference controllers to enhance performance in current sharing and DC bus voltage regulation without complex control loops and calculations. The validation of the proposed strategy is demonstrated through comprehensive simulation and experiment results across various scenarios.