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Direct-Lyapunov-Based Control Scheme for Voltage Regulation in a Three-Phase Islanded Microgrid with Renewable Energy Sources

Author

Listed:
  • Hadi Hosseini Kordkheili

    (Faculty of Electrical and Robotic Engineering, Shahrood University of Technology, Shahrood 3619995161, Iran)

  • Mahdi Banejad

    (Faculty of Electrical and Robotic Engineering, Shahrood University of Technology, Shahrood 3619995161, Iran)

  • Ali Akbarzadeh Kalat

    (Faculty of Electrical and Robotic Engineering, Shahrood University of Technology, Shahrood 3619995161, Iran)

  • Edris Pouresmaeil

    (Department of Electrical Engineering and Automation, Aalto University, 02150 Espoo, Finland)

  • João P. S. Catalão

    (INESC TEC, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal
    C-MAST, University of Beira Interior, Covilhã 6201-001, Portugal
    INESC-ID, Instituto Superior Técnico, University of Lisbon, Lisbon 1049-001, Portugal)

Abstract

In this paper, the local control structure of a microgrid is partially modified by a Lyapunov-based controller. This controller is derived based on direct Lyapunov stability theory (DLST) in order to calculate proper switching functions for the stable operation of the local controller as well as proper local performance of each inverter-based distributed generation (DG) unit. The main contribution is the use of DLST-based controller in a hierarchical primary control structure along with a DC-side voltage regulator. A current-based droop controller is also introduced along with a voltage harmonic compensation technique. The control limits of droop equations are calculated based on steady-state and dynamic capability curve as well as voltage-frequency ellipse curve. The effect of the variations of voltages and circuit parameters on the capability curves are also investigated and the microgrid (MG) steady-state operation area is obtained. In the proposed method, the DC-voltage variations are regulated by an additional voltage control loop based on a current reference correction signal. The above-mentioned approaches are derived thoroughly with mathematical equations. The effectiveness of the designed controllers is verified by a MATLAB/SIMULINK simulation platform (Matlab/Simulink R2014a, Mathworks, Inc.) with harmonically distorted intermittent loads. The results show the appropriate performance of the proposed controllers during both steady-state and transient dynamic conditions.

Suggested Citation

  • Hadi Hosseini Kordkheili & Mahdi Banejad & Ali Akbarzadeh Kalat & Edris Pouresmaeil & João P. S. Catalão, 2018. "Direct-Lyapunov-Based Control Scheme for Voltage Regulation in a Three-Phase Islanded Microgrid with Renewable Energy Sources," Energies, MDPI, vol. 11(5), pages 1-18, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1161-:d:144853
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    References listed on IDEAS

    as
    1. Yin, Xiu-xing & Lin, Yong-gang & Li, Wei & Gu, Ya-jing & Liu, Hong-wei & Lei, Peng-fei, 2015. "A novel fuzzy integral sliding mode current control strategy for maximizing wind power extraction and eliminating voltage harmonics," Energy, Elsevier, vol. 85(C), pages 677-686.
    2. Mehrasa, Majid & Pouresmaeil, Edris & Akorede, Mudathir Funsho & Jørgensen, Bo Nørregaard & Catalão, João P.S., 2015. "Multilevel converter control approach of active power filter for harmonics elimination in electric grids," Energy, Elsevier, vol. 84(C), pages 722-731.
    3. Akorede, Mudathir Funsho & Hizam, Hashim & Pouresmaeil, Edris, 2010. "Distributed energy resources and benefits to the environment," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(2), pages 724-734, February.
    4. Planas, Estefanía & Gil-de-Muro, Asier & Andreu, Jon & Kortabarria, Iñigo & Martínez de Alegría, Iñigo, 2013. "General aspects, hierarchical controls and droop methods in microgrids: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 17(C), pages 147-159.
    5. Mehrasa, Majid & Pouresmaeil, Edris & Zabihi, Sasan & Rodrigues, Eduardo M.G. & Catalão, João P.S., 2016. "A control strategy for the stable operation of shunt active power filters in power grids," Energy, Elsevier, vol. 96(C), pages 325-334.
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    Cited by:

    1. Weipeng Yang & Hang Zhang & Jungang Li & Aimin Zhang & Yunhong Zhou & Jianhua Wang, 2018. "PIDR Sliding Mode Current Control with Online Inductance Estimator for VSC-MVDC System Converter Stations under Unbalanced Grid Voltage Conditions," Energies, MDPI, vol. 11(10), pages 1-20, September.

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