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With the continuous advancement of modern power systems, virtual synchronous generator (VSG) control has emerged as a classic virtual inertia control method, leveraging electromechanical characteristics similar to synchronous generators (SG) and finding widespread application. However, inheriting electromechanical characteristics from physical inertia units, virtual inertia units introduce risks of “virtual-physical hybrid inertia system oscillations” exacerbation. Addressing this issue, this study firstly constructs the Phillips-Heffron model of the VSG-SG dual-generator grid-connected system to elucidate the mechanism behind electromechanical oscillations in virtual-physical hybrid inertia systems. Secondly, drawing from traditional dual-input power system stabilizer like PSS2B, this paper proposes a virtual power system stabilizer 2B (VPSS2B) integrated with the VSG virtual excitation control to suppress quasi-electromechanical oscillations in power system. The structure of VPSS2B is presented. Finally, through simulation comparisons, the effectiveness of the proposed VPSS2B is validated.

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Quasi-Electromechanical Oscillations Suppression Strategy for Power System Based on VPSS2B

  • 会议论文

  • 发表日期：

    2025年

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  • Jia Liu,
  • Shengyang Lu,
  • Mingqi Liu,
  • Guanfeng Zhang,
  • Jian Dong,
  • Yiming Ma,
  • Haixin Wang,
  • Junyou Yang

摘要

With the continuous advancement of modern power systems, virtual synchronous generator (VSG) control has emerged as a classic virtual inertia control method, leveraging electromechanical characteristics similar to synchronous generators (SG) and finding widespread application. However, inheriting electromechanical characteristics from physical inertia units, virtual inertia units introduce risks of “virtual-physical hybrid inertia system oscillations” exacerbation. Addressing this issue, this study firstly constructs the Phillips-Heffron model of the VSG-SG dual-generator grid-connected system to elucidate the mechanism behind electromechanical oscillations in virtual-physical hybrid inertia systems. Secondly, drawing from traditional dual-input power system stabilizer like PSS2B, this paper proposes a virtual power system stabilizer 2B (VPSS2B) integrated with the VSG virtual excitation control to suppress quasi-electromechanical oscillations in power system. The structure of VPSS2B is presented. Finally, through simulation comparisons, the effectiveness of the proposed VPSS2B is validated.