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Impedance Modeling and Stability Analysis of DFIG-Based Wind Energy Conversion System Considering Frequency Coupling

Author

Listed:
  • Shaojian Song

    (School of Electrical Engineering, Guangxi University, Nanning 530004, China)

  • Peichen Guan

    (School of Electrical Engineering, Guangxi University, Nanning 530004, China)

  • Bin Liu

    (School of Electrical Engineering, Guangxi University, Nanning 530004, China)

  • Yimin Lu

    (School of Electrical Engineering, Guangxi University, Nanning 530004, China)

  • Huihwang Goh

    (School of Electrical Engineering, Guangxi University, Nanning 530004, China)

Abstract

Impedance-based stability analysis is an effective method for addressing a new type of SSO accidents that have occurred in recent years, especially those caused by the control interaction between a DFIG and the power grid. However, the existing impedance modeling of DFIGs is mostly focused on a single converter, such as the GSC or RSC, and the influence between the RSC and GSC, as well as the frequency coupling effect inside the converter are usually overlooked, reducing the accuracy of DFIG stability analysis. Hence, the entire impedance is proposed in this paper for the DFIG-based WECS, taking coupling factors into account (e.g., DC bus voltage dynamics, asymmetric current regulation in the dq frame, and PLL). Numerical calculations and HIL simulations on RT-Lab were used to validate the proposed model. The results indicate that the entire impedance model with frequency coupling is more accurate, and it is capable of accurately predicting the system’s possible resonance points.

Suggested Citation

  • Shaojian Song & Peichen Guan & Bin Liu & Yimin Lu & Huihwang Goh, 2021. "Impedance Modeling and Stability Analysis of DFIG-Based Wind Energy Conversion System Considering Frequency Coupling," Energies, MDPI, vol. 14(11), pages 1-22, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:11:p:3243-:d:567297
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    References listed on IDEAS

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    1. Shair, Jan & Xie, Xiaorong & Wang, Luping & Liu, Wei & He, Jingbo & Liu, Hui, 2019. "Overview of emerging subsynchronous oscillations in practical wind power systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 99(C), pages 159-168.
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    Cited by:

    1. Guoli Feng & Zhihao Ye & Yihui Xia & Heng Nian & Liming Huang & Zerun Wang, 2022. "High Frequency Resonance Suppression Strategy of Three-Phase Four-Wire Split Capacitor Inverter Connected to Parallel Compensation Grid," Energies, MDPI, vol. 15(4), pages 1-20, February.
    2. Guoli Feng & Zhihao Ye & Yihui Xia & Liming Huang & Zerun Wang, 2022. "Impedance Modeling and Stability Analysis of Three-Phase Four-Wire Inverter with Grid-Connected Operation," Energies, MDPI, vol. 15(8), pages 1-26, April.
    3. Xiaojie Zhou & Dezhi Xu & Yourui Huang, 2022. "Impedance Characteristics and Harmonic Analysis of LCL-Type Grid-Connected Converter Cluster," Energies, MDPI, vol. 15(10), pages 1-18, May.

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