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Model-Free Power Control for Low-Voltage AC Dispatchable Microgrids with Multiple Points of Connection

Author

Listed:
  • Geovane dos Reis

    (Instituto de Ciências Tecnológicas (ICT), Campus Itabira, Universidade Federal de Itajubá (UNIFEI), Itabira 35903-087, Brazil
    Graduate Program in Electrical Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil)

  • Eduardo Liberado

    (Campus of Rosana, São Paulo State University (UNESP), Rosana 19273-000, Brazil)

  • Fernando Marafão

    (Campus of Sorocaba, São Paulo State University (UNESP), Sorocaba 18087-180, Brazil)

  • Clodualdo Sousa

    (Instituto de Ciências Tecnológicas (ICT), Campus Itabira, Universidade Federal de Itajubá (UNIFEI), Itabira 35903-087, Brazil)

  • Waner Silva

    (Instituto de Ciências Tecnológicas (ICT), Campus Itabira, Universidade Federal de Itajubá (UNIFEI), Itabira 35903-087, Brazil)

  • Danilo Brandao

    (Graduate Program in Electrical Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil)

Abstract

This paper proposes a modified version of the power-based control (MPBC) applied to microgrids (µGs) with multiple points of connection (i.e., utility grid itself or any other neighboring µG). Using the MPBC, single-phase distributed energy resources (DERs) arbitrarily connected between the phases share the amounts of balanced power, while the unbalanced and homopolar power are steered only to the line-to-neutral inverters. The control technique is based on a three-level hierarchical control using narrow bandwidth, low data rate communication that properly coordinates the DERs connected to three-phase four-wire µGs. The MPBC allows the DERs to steer power flow at any of the multiple points of common coupling of a multi-PCC dispatchable µG. The modified control proposed herein is evaluated through simulation results using MATLAB/SIMULINK considering a real urban distribution grid with typical operational elements and conditions. When compared to the original power-based control (PBC), results show that a meshed µG may reach power benchmarks with accommodation time 80% lower when applying MPBC. Moreover, it may also lead to significant power loss reduction (about of 5%) in some studied cases.

Suggested Citation

  • Geovane dos Reis & Eduardo Liberado & Fernando Marafão & Clodualdo Sousa & Waner Silva & Danilo Brandao, 2021. "Model-Free Power Control for Low-Voltage AC Dispatchable Microgrids with Multiple Points of Connection," Energies, MDPI, vol. 14(19), pages 1-20, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:19:p:6390-:d:650802
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    References listed on IDEAS

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    1. Brandao, Danilo I. & de Araújo, Lucas S. & Caldognetto, Tommaso & Pomilio, José A., 2018. "Coordinated control of three- and single-phase inverters coexisting in low-voltage microgrids," Applied Energy, Elsevier, vol. 228(C), pages 2050-2060.
    2. Ismael, Sherif M. & Abdel Aleem, Shady H.E. & Abdelaziz, Almoataz Y. & Zobaa, Ahmed F., 2019. "State-of-the-art of hosting capacity in modern power systems with distributed generation," Renewable Energy, Elsevier, vol. 130(C), pages 1002-1020.
    3. Bandeiras, F. & Pinheiro, E. & Gomes, M. & Coelho, P. & Fernandes, J., 2020. "Review of the cooperation and operation of microgrid clusters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 133(C).
    Full references (including those not matched with items on IDEAS)

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    Cited by:

    1. Ronaldo Silveira Junior, Jose & Conrado, Bruna R.P. & Matheus dos Santos Alonso, Augusto & Iglesias Brandao, Danilo, 2023. "Interoperability of single-controllable clusters: Aggregate response of low-voltage microgrids," Applied Energy, Elsevier, vol. 340(C).
    2. Geovane L. Reis & Danilo I. Brandao & João H. Oliveira & Lucas S. Araujo & Braz J. Cardoso Filho, 2022. "Case Study of Single-Controllable Microgrid: A Practical Implementation," Energies, MDPI, vol. 15(17), pages 1-22, September.
    3. Augusto M. S. Alonso & Luis De Oro Arenas & Danilo I. Brandao & Elisabetta Tedeschi & Ricardo Q. Machado & Fernando P. Marafão, 2022. "Current-Based Coordination of Distributed Energy Resources in a Grid-Connected Low-Voltage Microgrid: An Experimental Validation of Adverse Operational Scenarios," Energies, MDPI, vol. 15(17), pages 1-26, September.

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