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The large-scale integration of renewable energy sources has amplified the challenge of low-frequency oscillations (LFO) in power systems. This paper addresses the low-frequency oscillation suppression needs of virtual synchronous generators (VSG) and traditional synchronous generators (SG) in interconnected systems. A modular model of the VSG-SG interconnected system is established to reveal its electromechanical oscillation mechanisms. Additionally, an optimized control strategy based on a power-enhanced Virtual Power System Stabilizer (VPSS2B) is proposed. This stabilizer uses a dual-input design (frequency deviation and power deviation) to generate an additional power signal through dynamic phase compensation. This design overcomes the limitations of traditional single-input stabilizers in responding to rapid disturbances and effectively enhances the system’s damping capability. Simulation results demonstrate that the VPSS2B significantly improves the damping coefficient of oscillation modes, reduces the oscillation amplitude of the VSG’s active power and virtual power angle, and shortens the system’s recovery time. This strategy provides technical support for the stable operation of high-penetration renewable energy grids.

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A Power-Enhanced Virtual Power System Stabilizer for Low-Frequency Oscillation Suppression

  • 会议论文

  • 发表日期：

    2026年

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  • Haixin Wang,
  • Zelin Liu,
  • Shengyang Lu,
  • Xu Yang,
  • Chaohong Zeng,
  • Qingshan Liu,
  • Jia Liu,
  • Junyou Yang

摘要

The large-scale integration of renewable energy sources has amplified the challenge of low-frequency oscillations (LFO) in power systems. This paper addresses the low-frequency oscillation suppression needs of virtual synchronous generators (VSG) and traditional synchronous generators (SG) in interconnected systems. A modular model of the VSG-SG interconnected system is established to reveal its electromechanical oscillation mechanisms. Additionally, an optimized control strategy based on a power-enhanced Virtual Power System Stabilizer (VPSS2B) is proposed. This stabilizer uses a dual-input design (frequency deviation and power deviation) to generate an additional power signal through dynamic phase compensation. This design overcomes the limitations of traditional single-input stabilizers in responding to rapid disturbances and effectively enhances the system’s damping capability. Simulation results demonstrate that the VPSS2B significantly improves the damping coefficient of oscillation modes, reduces the oscillation amplitude of the VSG’s active power and virtual power angle, and shortens the system’s recovery time. This strategy provides technical support for the stable operation of high-penetration renewable energy grids.