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Feedback Linearization-Based Control Strategy for Interlinking Inverters of Hybrid AC/DC Microgrids with Seamless Operation Mode Transition

Author

Listed:
  • Thanh Hai Nguyen

    (Faculty of Engineering Technology and Science, Higher Colleges of Technology, Dubai P.O. Box 16062, United Arab Emirates)

  • Tan Luong Van

    (Department of Electrical and Electronics Engineering, Ho Chi Minh City University of Food Industry, 140 Le Trong Tan, Ho Chi Minh City 760310, Vietnam)

  • Asif Nawaz

    (Faculty of Engineering Technology and Science, Higher Colleges of Technology, Dubai P.O. Box 16062, United Arab Emirates)

  • Ammar Natsheh

    (Faculty of Engineering Technology and Science, Higher Colleges of Technology, Dubai P.O. Box 16062, United Arab Emirates)

Abstract

This study proposes an advanced control scheme for the interlinking inverters of the hybrid AC/DC microgrids, which facilitates a seamless transition between grid-connected and stand-alone/islanding modes for the microgrid. Due to a nonlinear relationship between the terminal voltages of the voltage-source inverter (VSI) interfacing through inductor–capacitor (LC) filters with the grid voltages and currents, a feedback linearization technique (FLT) is employed to control the interlinking VSI under both grid-connected and islanding operations. The FLT-based current controllers are applied in the grid-connected mode, in which they adjust the power exchange between the DC and AC subgrids and mitigate the distortion of the grid currents produced by nonlinear loads. Under the stand-alone operation, the AC bus voltages are directly regulated by the FLT-voltage controllers of the interlinking VSI. In order to reduce the inrush currents and voltage overshot at the instant of mode switching, the FLT-based controllers are performed all the time regardless of the operating modes, where the voltage references for the VSI are not changed abruptly. The control performance of the VSI is highly satisfactory with low-transient overshoot values of the voltages and currents and low total harmonic distortion (THD) values of the grid currents and AC bus voltages are about 3.5% and 2.7%, respectively, under the nonlinear load condition. The validity of the new control strategy is verified by the simulation work, which investigates the operation of a hybrid AC/DC microgrid.

Suggested Citation

  • Thanh Hai Nguyen & Tan Luong Van & Asif Nawaz & Ammar Natsheh, 2021. "Feedback Linearization-Based Control Strategy for Interlinking Inverters of Hybrid AC/DC Microgrids with Seamless Operation Mode Transition," Energies, MDPI, vol. 14(18), pages 1-17, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:18:p:5613-:d:630725
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    References listed on IDEAS

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    1. Jing Li & Hongda Cai & Pengcheng Yang & Wei Wei, 2021. "A Bus-Sectionalized Hybrid AC/DC Microgrid: Concept, Control Paradigm, and Implementation," Energies, MDPI, vol. 14(12), pages 1-24, June.
    2. Jung-min Park & Hyung-jun Byun & Sung-hun Kim & Si-hwan Kim & Chung-yuen Won, 2021. "DC Solid-State Circuit Breakers with Two-Winding Coupled Inductor for DC Microgrid," Energies, MDPI, vol. 14(14), pages 1-13, July.
    3. Sadaqat Ali & Zhixue Zheng & Michel Aillerie & Jean-Paul Sawicki & Marie-Cécile Péra & Daniel Hissel, 2021. "A Review of DC Microgrid Energy Management Systems Dedicated to Residential Applications," Energies, MDPI, vol. 14(14), pages 1-26, July.
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    Cited by:

    1. Sohail Sarwar & Desen Kirli & Michael M. C. Merlin & Aristides E. Kiprakis, 2022. "Major Challenges towards Energy Management and Power Sharing in a Hybrid AC/DC Microgrid: A Review," Energies, MDPI, vol. 15(23), pages 1-30, November.
    2. Vitor Fernão Pires & Armando Pires & Armando Cordeiro, 2023. "DC Microgrids: Benefits, Architectures, Perspectives and Challenges," Energies, MDPI, vol. 16(3), pages 1-20, January.
    3. Shumei Chi & Zhipeng Lv & Lan Liu & Yang Shan, 2021. "Free Switching Control Strategy for Multi-Operation Modes of Multi-Port Energy Router in Distribution Area," Energies, MDPI, vol. 14(23), pages 1-24, November.
    4. Thanh Hai Nguyen & Asif Nawaz & Preetha Sreekumar & Ammar Natsheh & Vishwesh Akre & Tan Luong Van, 2022. "Implementation and Validation for Multitasks of a Cost-Effective Scheme Based on ESS and Braking Resistors in PMSG Wind Turbine Systems," Energies, MDPI, vol. 15(21), pages 1-20, November.

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