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Robust Output Feedback Control of the Voltage Source Inverter in an AC Microgrid

Author

Listed:
  • Hamid Saeed Khan

    (Department of Electronics & Power Engineering, PN Engineering College, National University of Science and Technology, Karachi 75350, Pakistan)

  • Attaullah Y. Memon

    (Department of Electronics & Power Engineering, PN Engineering College, National University of Science and Technology, Karachi 75350, Pakistan)

Abstract

This paper presents the mathematical model and control of the voltage source inverter (VSI) connected to an alternating current (AC) microgrid. The VSI used in this work was a six-switch three-phase PWM inverter, whose output voltages were controlled in a synchronous ( d q ) reference frame via a sliding mode control strategy. The control strategy required only output voltages; other states of the system were estimated by using a high-gain observer. The power-sharing among multiple inverters was achieved by solving power flow equations of the electrical network. The stability analysis showed that the error was ultimately bound in the case of the real PWM inverter and/or with a nonlinear load in the electrical network. The microgrid was simulated using the SimPowerSystems Toolbox from MATLAB/Simulink. The simulation results show the effectiveness of the proposed control scheme. The output voltage regulation of the inverter and power-sharing was achieved with the ultimately bounded error for the linear load. Later, the nonlinear load was also included in the electrical network and the error was shown to remain ultimately bounded. The output voltage regulation and power-sharing were achieved with the nonlinear load in the system.

Suggested Citation

  • Hamid Saeed Khan & Attaullah Y. Memon, 2022. "Robust Output Feedback Control of the Voltage Source Inverter in an AC Microgrid," Energies, MDPI, vol. 15(15), pages 1-21, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5586-:d:877680
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    References listed on IDEAS

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    1. Khaizaran Abdulhussein Al Sumarmad & Nasri Sulaiman & Noor Izzri Abdul Wahab & Hashim Hizam, 2022. "Energy Management and Voltage Control in Microgrids Using Artificial Neural Networks, PID, and Fuzzy Logic Controllers," Energies, MDPI, vol. 15(1), pages 1-22, January.
    2. Mohammed Said Jouda & Nihan Kahraman, 2022. "Improved Optimal Control of Transient Power Sharing in Microgrid Using H-Infinity Controller with Artificial Bee Colony Algorithm," Energies, MDPI, vol. 15(3), pages 1-26, January.
    3. Ruiming Liu & Shengtie Wang & Guangchen Liu & Sufang Wen & Jianwei Zhang & Yuechao Ma, 2022. "An Improved Virtual Inertia Control Strategy for Low Voltage AC Microgrids with Hybrid Energy Storage Systems," Energies, MDPI, vol. 15(2), pages 1-21, January.
    4. Wei Hu & Yu Shen & Zhichun Yang & Huaidong Min, 2022. "Mixed H 2 /H ∞ Optimal Voltage Control Design for Smart Transformer Low-Voltage Inverter," Energies, MDPI, vol. 15(1), pages 1-18, January.
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    Cited by:

    1. Hamid Saeed Khan & Attaullah Y. Memon, 2023. "Active and Reactive Power Control of the Voltage Source Inverter in an AC Microgrid," Sustainability, MDPI, vol. 15(2), pages 1-19, January.

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