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Dynamic Distributed Collaborative Control for Equitable Current Distribution and Voltage Recovery in DC Microgrids

Author

Listed:
  • Olanrewaju Lasabi

    (Discipline of Electrical, Electronic and Computer Engineering, University of KwaZulu-Natal, Durban 4041, South Africa)

  • Andrew Swanson

    (Discipline of Electrical, Electronic and Computer Engineering, University of KwaZulu-Natal, Durban 4041, South Africa)

  • Leigh Jarvis

    (Discipline of Electrical, Electronic and Computer Engineering, University of KwaZulu-Natal, Durban 4041, South Africa)

  • Anuoluwapo Aluko

    (Power Research Laboratory, Department of Electrical and Software Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada)

Abstract

In a stand-alone DC microgrid featuring several distributed energy resources (DERs), droop control is adopted to achieve a proportional distribution of current among the DERs within the microgrid. The operation of the droop control mechanism leads to a variation in bus voltage, which is further amplified by the line impedance between the DC bus and DERs. This paper proposes an enhanced distributed secondary control technique aimed at achieving equitable current sharing and voltage regulation simultaneously within a DC microgrid. The proposed distributed secondary control is incorporated into the cyber layer of the microgrid, facilitating the exchange of information among the controllers. In the event of a communication link breakdown, this technique upholds the reliability of the entire system. The control loop utilizes a type-II fuzzy logic control framework for the adaptive selection of the control parameters to improve the control response. Furthermore, the proposed technique can handle both resistive and constant power loads without any particular prerequisites. Utilizing the Lyapunov method, appropriate stability criteria for the proposed controller have been formulated. Various tests were performed across a range of operational scenarios to assess the robustness of the proposed control technique through MATLAB/Simulink ® models, which have been validated with real-time experiments. The outcomes revealed that the proposed control effectively achieves its control objectives within a DC microgrid, showcasing rapid responsiveness and minimal oscillation.

Suggested Citation

  • Olanrewaju Lasabi & Andrew Swanson & Leigh Jarvis & Anuoluwapo Aluko, 2023. "Dynamic Distributed Collaborative Control for Equitable Current Distribution and Voltage Recovery in DC Microgrids," Energies, MDPI, vol. 16(18), pages 1-40, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:18:p:6657-:d:1241505
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    References listed on IDEAS

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    1. Liyuan Gao & Yao Liu & Huisong Ren & Josep M. Guerrero, 2017. "A DC Microgrid Coordinated Control Strategy Based on Integrator Current-Sharing," Energies, MDPI, vol. 10(8), pages 1-17, August.
    2. Anuoluwapo Aluko & Elutunji Buraimoh & Oluwafemi Emmanuel Oni & Innocent Ewean Davidson, 2022. "Advanced Distributed Cooperative Secondary Control of Islanded DC Microgrids," Energies, MDPI, vol. 15(11), pages 1-17, May.
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    Cited by:

    1. Olanrewaju Lasabi & Andrew Swanson & Leigh Jarvis & Anuoluwapo Aluko & Arman Goudarzi, 2024. "Coordinated Hybrid Approach Based on Firefly Algorithm and Particle Swarm Optimization for Distributed Secondary Control and Stability Analysis of Direct Current Microgrids," Sustainability, MDPI, vol. 16(3), pages 1-28, January.
    2. Ayberk Calpbinici & Erdal Irmak & Ersan Kabalcı, 2024. "Design and Implementation of an Energy Management System with Event-Triggered Distributed Secondary Control in DC Microgrids," Energies, MDPI, vol. 17(3), pages 1-28, January.

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