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Fault Current Characteristics of the DFIG under Asymmetrical Fault Conditions

Author

Listed:
  • Fan Xiao

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Zhe Zhang

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Xianggen Yin

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

During non-severe fault conditions, crowbar protection is not activated and the rotor windings of a doubly-fed induction generator (DFIG) are excited by the AC/DC/AC converter. Meanwhile, under asymmetrical fault conditions, the electrical variables oscillate at twice the grid frequency in synchronous dq frame. In the engineering practice, notch filters are usually used to extract the positive and negative sequence components. In these cases, the dynamic response of a rotor-side converter (RSC) and the notch filters have a large influence on the fault current characteristics of the DFIG. In this paper, the influence of the notch filters on the proportional integral (PI) parameters is discussed and the simplified calculation models of the rotor current are established. Then, the dynamic performance of the stator flux linkage under asymmetrical fault conditions is also analyzed. Based on this, the fault characteristics of the stator current under asymmetrical fault conditions are studied and the corresponding analytical expressions of the stator fault current are obtained. Finally, digital simulation results validate the analytical results. The research results are helpful to meet the requirements of a practical short-circuit calculation and the construction of a relaying protection system for the power grid with penetration of DFIGs.

Suggested Citation

  • Fan Xiao & Zhe Zhang & Xianggen Yin, 2015. "Fault Current Characteristics of the DFIG under Asymmetrical Fault Conditions," Energies, MDPI, vol. 8(10), pages 1-22, September.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:10:p:10971-10992:d:56606
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    References listed on IDEAS

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    1. Ouyang, Jinxin & Xiong, Xiaofu, 2014. "Dynamic behavior of the excitation circuit of a doubly-fed induction generator under a symmetrical voltage drop," Renewable Energy, Elsevier, vol. 71(C), pages 629-638.
    2. Christina N. Papadimitriou & Nicholas A. Vovos, 2010. "Transient Response Improvement of Microgrids Exploiting the Inertia of a Doubly-Fed Induction Generator (DFIG)," Energies, MDPI, vol. 3(6), pages 1-18, June.
    3. Yun Wang & Qiuwei Wu & Honghua Xu & Qinglai Guo & Hongbin Sun, 2014. "Fast Coordinated Control of DFIG Wind Turbine Generators for Low and High Voltage Ride-Through," Energies, MDPI, vol. 7(7), pages 1-17, June.
    4. Zhong Zheng & Geng Yang & Hua Geng, 2013. "Coordinated Control of a Doubly-Fed Induction Generator-Based Wind Farm and a Static Synchronous Compensator for Low Voltage Ride-through Grid Code Compliance during Asymmetrical Grid Faults," Energies, MDPI, vol. 6(9), pages 1-22, September.
    5. Zaijun Wu & Chanxia Zhu & Minqiang Hu, 2013. "Improved Control Strategy for DFIG Wind Turbines for Low Voltage Ride Through," Energies, MDPI, vol. 6(3), pages 1-17, February.
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    Cited by:

    1. Jing Li & Tao Zheng & Zengping Wang, 2018. "Short-Circuit Current Calculation and Harmonic Characteristic Analysis for a Doubly-Fed Induction Generator Wind Turbine under Converter Control," Energies, MDPI, vol. 11(9), pages 1-23, September.
    2. Flávio Oliveira & Arthur Amorim & Lucas Encarnação & Jussara Fardin & Marcos Orlando & Selênio Silva & Domingos Simonetti, 2015. "Enhancing LVRT of DFIG by Using a Superconducting Current Limiter on Rotor Circuit," Energies, MDPI, vol. 9(1), pages 1-12, December.
    3. Mourad Yessef & Badre Bossoufi & Mohammed Taoussi & Saad Motahhir & Ahmed Lagrioui & Hamid Chojaa & Sanghun Lee & Byeong-Gwon Kang & Mohamed Abouhawwash, 2022. "Improving the Maximum Power Extraction from Wind Turbines Using a Second-Generation CRONE Controller," Energies, MDPI, vol. 15(10), pages 1-23, May.
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