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A Robust Suboptimal Current Control of an Interlink Converter for a Hybrid AC/DC Microgrid

Author

Listed:
  • Ismi Rosyiana Fitri

    (Department of Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea)

  • Jung-Su Kim

    (Department of Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea)

  • Hwachang Song

    (Department of Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea)

Abstract

A hybrid AC/DC microgrid is established with the aim of exploiting numerous types of renewable energy to meet the needs of different loads. The microgrid is decomposed by AC DC sub-grids which are connected by an interlink converter (IC). To maintain the security and reliability of the microgrid, an automatic controller for the interlink converter is needed. In this paper, we propose a Linear Matrix Inequalities (LMI)-based current control method for the interlink converter. As the main features here, the interlink converter permits bidirectional power exchange between both sub-grids when a power–demand imbalance occurs in one sub-grid regardless of the converter system parameters. Simulations with various filter parameters are performed using the Matlab/Simulink software to validate the effectiveness of the proposed controller. In comparison with the existing Linear Quadratic Regulator (LQR)-based current control, the proposed method is more robust against unknown system parameters and high load perturbation.

Suggested Citation

  • Ismi Rosyiana Fitri & Jung-Su Kim & Hwachang Song, 2018. "A Robust Suboptimal Current Control of an Interlink Converter for a Hybrid AC/DC Microgrid," Energies, MDPI, vol. 11(6), pages 1-15, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1382-:d:149523
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    References listed on IDEAS

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    1. Dwi Riana Aryani & Jung-Su Kim & Hwachang Song, 2017. "Interlink Converter with Linear Quadratic Regulator Based Current Control for Hybrid AC/DC Microgrid," Energies, MDPI, vol. 10(11), pages 1-26, November.
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    Cited by:

    1. Panos C. Papageorgiou & Konstantinos F. Krommydas & Antonio T. Alexandridis, 2020. "Validation of Novel PLL-driven PI Control Schemes on Supporting VSIs in Weak AC-Connections," Energies, MDPI, vol. 13(6), pages 1-21, March.
    2. José Aravena & Dante Carrasco & Matias Diaz & Matias Uriarte & Felix Rojas & Roberto Cardenas & Juan Carlos Travieso, 2020. "Design and Implementation of a Low-Cost Real-Time Control Platform for Power Electronics Applications," Energies, MDPI, vol. 13(6), pages 1-15, March.
    3. Pablo Quintana-Barcia & Tomislav Dragicevic & Jorge Garcia & Javier Ribas & Josep M. Guerrero, 2018. "A Distributed Control Strategy for Islanded Single-Phase Microgrids with Hybrid Energy Storage Systems Based on Power Line Signaling," Energies, MDPI, vol. 12(1), pages 1-16, December.

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