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Impact of Filter Inductance on Transient Synchronization Stability of Grid-Connected Systems with Grid-Following Converters Under Voltage Sag Faults

Author

Listed:
  • Qianying Mou

    (School of Electrical Engineering, Shandong University, 17923 Jingshi Road, Lixia District, Jinan 250061, China)

  • Jingxiu Yuan

    (School of Electrical Engineering, Shandong University, 17923 Jingshi Road, Lixia District, Jinan 250061, China)

  • Yuhan Wu

    (School of Electrical Engineering, Shandong University, 17923 Jingshi Road, Lixia District, Jinan 250061, China)

  • Shumin Sun

    (Electric Power Research Institute, State Grid Shandong Electric Power Co., Ltd., Jinan 250003, China)

  • Jiawei Xing

    (Electric Power Research Institute, State Grid Shandong Electric Power Co., Ltd., Jinan 250003, China)

Abstract

As renewable energy sources become more prevalent, maintaining the sustainable and reliable operation of power systems has become as a major challenge. Modern grid-connected converter systems are particularly prone to losing synchronization when encountering large disturbances, which is a huge threat to the stability of the power grid, which is mainly based on renewable energy. This paper studies the impact of filter inductors on the synchronous stability of grid-connected converter systems, hoping to help us better connect renewable energy to the power grid. First, the existing synchronization stability model of grid-following (GFL) converters is extended by incorporating filter inductance modeling. Based on this model, a mathematical relationship between the phase-locked loop’s (PLL) frequency deviation and the filter inductance at the moment of fault is established, and a predictive method for GFL frequency deviation considering filter inductance is proposed. Furthermore, the impact of filter inductance on synchronization stability is systematically investigated through two key indicators: power angle overshoot and critical fault voltage, revealing the variation trends of transient stability under different operating conditions. Finally, the analytical results are validated through Matlab/Simulink simulations, providing theoretical guidance for the design of sustainable and robust renewable energy grid integration strategies.

Suggested Citation

  • Qianying Mou & Jingxiu Yuan & Yuhan Wu & Shumin Sun & Jiawei Xing, 2025. "Impact of Filter Inductance on Transient Synchronization Stability of Grid-Connected Systems with Grid-Following Converters Under Voltage Sag Faults," Sustainability, MDPI, vol. 17(19), pages 1-17, September.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:19:p:8634-:d:1758346
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    References listed on IDEAS

    as
    1. Yang Liu & Lin Zhu & Xinya Xu & Dongrui Li & Zhiwei Liang & Nan Ye, 2025. "Transient Synchronization Stability in Grid-Following Converters: Mechanistic Insights and Technological Prospects—A Review," Energies, MDPI, vol. 18(8), pages 1-25, April.
    2. Luay Elkhidir & Khalid Khan & Mohammad Al-Muhaini & Muhammad Khalid, 2022. "Enhancing Transient Response and Voltage Stability of Renewable Integrated Microgrids," Sustainability, MDPI, vol. 14(7), pages 1-21, March.
    3. Yue Li & Yanghong Xia & Yini Ni & Yonggang Peng & Qifan Feng, 2023. "Transient Stability Analysis for Grid-Forming VSCs Based on Nonlinear Decoupling Method," Sustainability, MDPI, vol. 15(15), pages 1-21, August.
    Full references (including those not matched with items on IDEAS)

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