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Equivalence of Primary Control Strategies for AC and DC Microgrids

Author

Listed:
  • Eneko Unamuno

    (Electronics and Computing Department, Mondragon Unibertsitatea, 20500 Mondragon, Spain)

  • Jon Andoni Barrena

    (Electronics and Computing Department, Mondragon Unibertsitatea, 20500 Mondragon, Spain)

Abstract

Microgrid frequency and voltage regulation is a challenging task, as classical generators with rotational inertia are usually replaced by converter-interfaced systems that inherently do not provide any inertial response. The aim of this paper is to analyse and compare autonomous primary control techniques for alternating current (AC) and direct current (DC) microgrids that improve this transient behaviour. In this context, a virtual synchronous machine (VSM) technique is investigated for AC microgrids, and its behaviour for different values of emulated inertia and droop slopes is tested. Regarding DC microgrids, a virtual-impedance-based algorithm inspired by the operation concept of VSMs is proposed. The results demonstrate that the proposed strategy can be configured to have an analogous behaviour to VSM techniques by varying the control parameters of the integrated virtual-impedances. This means that the steady-state and transient behaviour of converters employing these strategies can be configured independently. As shown in the simulations, this is an interesting feature that could be, for instance, employed for the integration of different dynamic generation or storage systems, such as batteries or supercapacitors.

Suggested Citation

  • Eneko Unamuno & Jon Andoni Barrena, 2017. "Equivalence of Primary Control Strategies for AC and DC Microgrids," Energies, MDPI, vol. 10(1), pages 1-13, January.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:1:p:91-:d:87641
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    References listed on IDEAS

    as
    1. Vandoorn, T.L. & De Kooning, J.D.M. & Meersman, B. & Vandevelde, L., 2013. "Review of primary control strategies for islanded microgrids with power-electronic interfaces," Renewable and Sustainable Energy Reviews, Elsevier, vol. 19(C), pages 613-628.
    2. Gopalan, Sachit A. & Sreeram, Victor & Iu, Herbert H.C., 2014. "A review of coordination strategies and protection schemes for microgrids," Renewable and Sustainable Energy Reviews, Elsevier, vol. 32(C), pages 222-228.
    3. Unamuno, Eneko & Barrena, Jon Andoni, 2015. "Hybrid ac/dc microgrids—Part I: Review and classification of topologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 1251-1259.
    4. Tielens, Pieter & Van Hertem, Dirk, 2016. "The relevance of inertia in power systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 999-1009.
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    Cited by:

    1. Darioush Razmi & Tianguang Lu, 2022. "A Literature Review of the Control Challenges of Distributed Energy Resources Based on Microgrids (MGs): Past, Present and Future," Energies, MDPI, vol. 15(13), pages 1-21, June.
    2. Furqan Asghar & Muhammad Talha & Sung Ho Kim, 2017. "Robust Frequency and Voltage Stability Control Strategy for Standalone AC/DC Hybrid Microgrid," Energies, MDPI, vol. 10(6), pages 1-20, May.
    3. Thai-Thanh Nguyen & Hyeong-Jun Yoo & Hak-Man Kim, 2017. "Analyzing the Impacts of System Parameters on MPC-Based Frequency Control for a Stand-Alone Microgrid," Energies, MDPI, vol. 10(4), pages 1-17, March.

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