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Coupling DFIG-Based Wind Turbines with the Grid under Voltage Imbalance Conditions

Author

Listed:
  • Ahmed Sobhy

    (School of Automation, Beijing Institute of Technology, Beijing 100081, China
    Department of Electrical Engineering, Faculty of Engineering, Port Said University, Port Said 42526, Egypt)

  • Ahmed G. Abo-Khalil

    (Sustainable and Renewable Energy Engineering Department, College of Engineering, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates
    Department of Electrical Engineering, College of Engineering, Assuit University, Assuit 71515, Egypt)

  • Dong Lei

    (School of Automation, Beijing Institute of Technology, Beijing 100081, China)

  • Tareq Salameh

    (Sustainable and Renewable Energy Engineering Department, College of Engineering, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates)

  • Adel Merabet

    (Division of Engineering, Saint Mary’s University, Halifax, NS B3H 3C3, Canada)

  • Malek Alkasrawi

    (Industrial Assessment Center, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA)

Abstract

A smooth coupling is implemented between the grid and doubly fed induction generator-based wind turbines (DFIG-WTs) during grid voltage imbalance. The nonlinear characteristics of a grid-connected DFIG-WT system may increase stresses on the mechanical and electrical components of wind turbines. Such difficulties are greatly increased during periods of voltage imbalance. Consequently, in this paper, a new control scheme is proposed to regulate DFIGs in order to support a smooth connection to the grid during voltage imbalance. In synchronization mode, the positive sequence of the rotor dq -axes currents regulates the stator q -axis EMF that is to be synchronized with the q -axis voltage of the grid-side voltage. The phase difference between the grid and stator voltages is compensated by adjusting the stator d -axis EMF to zero. Under normal conditions, a PR controller is used to dampen the negative sequence of the rotor dq -axes currents. PI current controllers are tuned to control the positive sequence of the DFIG rotor currents, while PR current controllers are used to regulate the negative sequence of the rotor currents during synchronization and under normal operation conditions. Experiments are performed to verify the smooth synchronization of the DFIG and the robustness of the proposed control scheme during grid voltage imbalance.

Suggested Citation

  • Ahmed Sobhy & Ahmed G. Abo-Khalil & Dong Lei & Tareq Salameh & Adel Merabet & Malek Alkasrawi, 2022. "Coupling DFIG-Based Wind Turbines with the Grid under Voltage Imbalance Conditions," Sustainability, MDPI, vol. 14(9), pages 1-20, April.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:9:p:5076-:d:800326
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    References listed on IDEAS

    as
    1. Ahmed G. Abo-Khalil & Ali S. Alghamdi & Ali M. Eltamaly & M. S. Al-Saud & Praveen R. P. & Khairy Sayed & G. R. Bindu & Iskander Tlili, 2019. "Design of State Feedback Current Controller for Fast Synchronization of DFIG in Wind Power Generation Systems," Energies, MDPI, vol. 12(12), pages 1-26, June.
    2. Yan Yan & Meng Wang & Zhan-Feng Song & Chang-Liang Xia, 2012. "Proportional-Resonant Control of Doubly-Fed Induction Generator Wind Turbines for Low-Voltage Ride-Through Enhancement," Energies, MDPI, vol. 5(11), pages 1-21, November.
    3. Ali Mohamed Eltamaly & Mamdooh Al-Saud & Khairy Sayed & Ahmed G. Abo-Khalil, 2020. "Sensorless Active and Reactive Control for DFIG Wind Turbines Using Opposition-Based Learning Technique," Sustainability, MDPI, vol. 12(9), pages 1-14, April.
    4. Akrama Khan & Xiao Ming Hu & Mohamed Azeem Khan & Paul Barendse, 2020. "Doubly Fed Induction Generator Open Stator Synchronized Control during Unbalanced Grid Voltage Condition," Energies, MDPI, vol. 13(12), pages 1-13, June.
    5. Yaozhen Han & Ronglin Ma, 2019. "Adaptive-Gain Second-Order Sliding Mode Direct Power Control for Wind-Turbine-Driven DFIG under Balanced and Unbalanced Grid Voltage," Energies, MDPI, vol. 12(20), pages 1-18, October.
    6. Abo-Khalil, Ahmed G., 2012. "Synchronization of DFIG output voltage to utility grid in wind power system," Renewable Energy, Elsevier, vol. 44(C), pages 193-198.
    7. Imran Khan & Kamran Zeb & Waqar Ud Din & Saif Ul Islam & Muhammad Ishfaq & Sadam Hussain & Hee-Je Kim, 2019. "Dynamic Modeling and Robust Controllers Design for Doubly Fed Induction Generator-Based Wind Turbines under Unbalanced Grid Fault Conditions," Energies, MDPI, vol. 12(3), pages 1-23, January.
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