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Improve Strategy for Transient Power Angle Stability Control of VSG Combining Frequency Difference Feedback and Virtual Impedance

by Dianlang Wang1, Qi Yin1, Haifeng Wang1, Jing Chen1, Hong Miao2, Yihan Chen2,*

1 Substation Management Office, Qujing Bureau of CSG EHV Power Transmission Company, Qujing, 655000, China
2 College of Electrical Engineering, Sichuan University, Chengdu, 610065, China

* Corresponding Author: Yihan Chen. Email: email

Energy Engineering 2025, 122(2), 651-666. https://doi.org/10.32604/ee.2025.057670

Abstract

As the penetration rate of distributed energy increases, the transient power angle stability problem of the virtual synchronous generator (VSG) has gradually become prominent. In view of the situation that the grid impedance ratio (R/X) is high and affects the transient power angle stability of VSG, this paper proposes a VSG transient power angle stability control strategy based on the combination of frequency difference feedback and virtual impedance. To improve the transient power angle stability of the VSG, a virtual impedance is adopted in the voltage loop to adjust the impedance ratio R/X; and the PI control feedback of the VSG frequency difference is introduced in the reactive power-voltage link of the VSG to enhance the damping effect. The second-order VSG dynamic nonlinear model considering the reactive power-voltage loop is established and the influence of different proportional integral (PI) control parameters on the system balance stability is analyzed. Moreover, the impact of the impedance ratio R/X on the transient power angle stability is presented using the equal area criterion. In the simulations, during the voltage dips with the reduction of R/X from 1.6 to 0.8, Δδ 1 is reduced from 0.194 rad to 0.072 rad, Δf 1 is reduced from 0.170 to 0.093 Hz, which shows better transient power angle stability. Simulation results verify that compared with traditional VSG, the proposed method can effectively improve the transient power angle stability of the system.

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APA Style
Wang, D., Yin, Q., Wang, H., Chen, J., Miao, H. et al. (2025). Improve strategy for transient power angle stability control of VSG combining frequency difference feedback and virtual impedance. Energy Engineering, 122(2), 651–666. https://doi.org/10.32604/ee.2025.057670
Vancouver Style
Wang D, Yin Q, Wang H, Chen J, Miao H, Chen Y. Improve strategy for transient power angle stability control of VSG combining frequency difference feedback and virtual impedance. Energ Eng. 2025;122(2):651–666. https://doi.org/10.32604/ee.2025.057670
IEEE Style
D. Wang, Q. Yin, H. Wang, J. Chen, H. Miao, and Y. Chen, “Improve Strategy for Transient Power Angle Stability Control of VSG Combining Frequency Difference Feedback and Virtual Impedance,” Energ. Eng., vol. 122, no. 2, pp. 651–666, 2025. https://doi.org/10.32604/ee.2025.057670



cc Copyright © 2025 The Author(s). Published by Tech Science Press.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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