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Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids

Author

Listed:
  • Xiangyu Qin

    (College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China)

  • Zhengyu Lin

    (Wolfson School, Loughborough University, Loughborough LE11 3TU, UK)

  • Wei Jiang

    (College of Intelligent Manufacturing, Yangzhou Polytechnic Institute; Yangzhou 225127, China)

  • Hazel Lee

    (Frazer-Nash Consultancy; Leatherhead KT22 7LH, UK)

Abstract

For a DC microgrid with a traditional droop control strategy, achieving accurate power sharing among power converters is challenging due to mismatched line resistance. In a multi-bus DC microgrid system, changes in the power flow can further lead to variation in the equivalent line resistance of each power converter. To improve power sharing accuracy, an adaptive line resistance estimation method is proposed in this paper, which can accurately estimate line resistance without additional hardware. The estimated line resistances are then used to compensate the droop coefficient of each power converter to ensure accurate power sharing between power converters. Simulation and experimental results are presented to demonstrate the effectiveness of the proposed method for single bus, multi-bus, and ring-bus DC microgrid systems.

Suggested Citation

  • Xiangyu Qin & Zhengyu Lin & Wei Jiang & Hazel Lee, 2025. "Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids," Energies, MDPI, vol. 18(9), pages 1-19, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:9:p:2183-:d:1641782
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    References listed on IDEAS

    as
    1. Wenwen Li & Jianwei Ji & Henan Dong & Miao He & Shubo Hu, 2024. "Power Allocation Control Strategy of DC/DC Converters Based on Sliding Mode Control," Energies, MDPI, vol. 17(18), pages 1-18, September.
    2. Spyridon Chapaloglou & Babak Abdolmaleki & Elisabetta Tedeschi, 2023. "Optimal Generation Capacity Allocation and Droop Control Design for Current Sharing in DC Microgrids," Energies, MDPI, vol. 16(12), pages 1-17, June.
    3. Adewale W. Adegboyega & Saeed Sepasi & Harun Or Rashid Howlader & Brian Griswold & Marc Matsuura & Leon R. Roose, 2025. "DC Microgrid Deployments and Challenges: A Comprehensive Review of Academic and Corporate Implementations," Energies, MDPI, vol. 18(5), pages 1-33, February.
    4. Xiaoxi Liu & Libo Jiang & Tianwen Zheng & Zhengwei Zhu, 2025. "Research on Power Coordination Control Strategy of Microgrid Based on Reconfigurable Energy Storage," Energies, MDPI, vol. 18(5), pages 1-20, February.
    5. Mohamed A. Mesbah & Khairy Sayed & Adel Ahmed & Mahmoud Aref & Z. M. S. Elbarbary & Ali Saeed Almuflih & Mahmoud A. Mossa, 2024. "Adaptive Control Approach for Accurate Current Sharing and Voltage Regulation in DC Microgrid Applications," Energies, MDPI, vol. 17(2), pages 1-19, January.
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