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With the increase of renewable energy, the transient stability mechanism of power system is gradually undergoing profound changes. This paper takes the grid forming (GFM) converter as the research object. By establishing the equivalent rotor swing equation, the controllable operation area of output power instruction is derived, the stability mechanism and instability pattern of GFM system are described. Finally, this paper proposed a variable damping coefficient-based stability control strategy, which can enhance the equivalent line impedance of the grid forming system, so that the system can adaptively offset the unbalanced transient energy. This could help the GFM converter enhance the transient stability. The theoretical analysis is verified by simulations.

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Variable Damping Coefficient-Based Stability Control Strategy for Grid Forming Converter Under Grid Fault

  • 会议论文

  • 发表日期：

    2025年

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  • Qian Ma,
  • Bao Li,
  • Huifan Xie,
  • Xin Zhou,
  • Chengxiang Li,
  • Yihua Zhu,
  • Yuheng Yang

摘要

With the increase of renewable energy, the transient stability mechanism of power system is gradually undergoing profound changes. This paper takes the grid forming (GFM) converter as the research object. By establishing the equivalent rotor swing equation, the controllable operation area of output power instruction is derived, the stability mechanism and instability pattern of GFM system are described. Finally, this paper proposed a variable damping coefficient-based stability control strategy, which can enhance the equivalent line impedance of the grid forming system, so that the system can adaptively offset the unbalanced transient energy. This could help the GFM converter enhance the transient stability. The theoretical analysis is verified by simulations.