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Voltage Stability and Power Sharing Control of Distributed Generation Units in DC Microgrids

Author

Listed:
  • Kafeel Ahmed

    (School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia)

  • Irfan Hussain

    (School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
    Power Electronics and Renewable Energy Research Laboratory, Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia)

  • Mehdi Seyedmahmoudian

    (School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia)

  • Alex Stojcevski

    (School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia)

  • Saad Mekhilef

    (School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
    Power Electronics and Renewable Energy Research Laboratory, Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
    Electrical Engineering Department, College of Engineering, University of Ha’il, Ha’il 81481, Saudi Arabia)

Abstract

Advancements in power conversion efficiency and the growing prevalence of DC loads worldwide have underscored the importance of DC microgrids in modern energy systems. Addressing the challenges of power-sharing and voltage stability in these DC microgrids has been a prominent research focus. Sliding mode control (SMC) has demonstrated remarkable performance in various power electronic converter applications. This paper proposes the integration of universal droop control (UDC) with SMC to facilitate distributed energy resource interfacing and power-sharing control in DC microgrids. Compared to traditional Proportional-Integral (PI) control, the proposed control approach exhibits superior dynamic response characteristics. The UDC is strategically incorporated prior to the SMC and establishes limits on voltage variation and maximum power drawn from the DC–DC converters within the microgrid. A dynamic model of the DC–DC converter is developed as the initial stage, focusing on voltage regulation at the DC link through nonlinear control laws tailored for Distributed Generation (DG)-based converters. The UDC ensures voltage stability in the DC microgrid by imposing predetermined power constraints on the DGs. Comparative evaluations, involving different load scenarios, have been conducted to assess the performance of the proposed UDC-based SMC control in comparison to the PI control-based system. The results demonstrate the superior efficiency of the UDC-based SMC control in handling dynamic load changes. Furthermore, a practical test of the proposed controller has been conducted using a hardware prototype of a DC microgrid.

Suggested Citation

  • Kafeel Ahmed & Irfan Hussain & Mehdi Seyedmahmoudian & Alex Stojcevski & Saad Mekhilef, 2023. "Voltage Stability and Power Sharing Control of Distributed Generation Units in DC Microgrids," Energies, MDPI, vol. 16(20), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:20:p:7038-:d:1257276
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    References listed on IDEAS

    as
    1. Mohammed, Nabil & Callegaro, Leonardo & Ciobotaru, Mihai & Guerrero, Josep M., 2023. "Accurate power sharing for islanded DC microgrids considering mismatched feeder resistances," Applied Energy, Elsevier, vol. 340(C).
    2. Ensheng Zhao & Yang Han & Hao Zeng & Luqiao Li & Ping Yang & Congling Wang & Amr S. Zalhaf, 2022. "Accurate Peer-to-Peer Hierarchical Control Method for Hybrid DC Microgrid Clusters," Energies, MDPI, vol. 16(1), pages 1-27, December.
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    Cited by:

    1. Baochao Wang & Yanshi Lv & Xianggang Chu & Dongwei Wang & Shuqi Shang, 2024. "Design and Experimental Testing of Extended-Range Power Supply System for 15 Horsepower Electric Tractor," Agriculture, MDPI, vol. 14(9), pages 1-16, September.

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