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<p>The doubly fed induction generator (DFIG) with the virtual synchronous generator (VSG) is used to maintain the stability of power system, thus the interaction between them affects the stability of VSG, which is not studied in the existing literature. In this paper, the closed-loop linearized model of power system is derived with the VSG as the feed-forward loop and the synchronous generator and the DFIG as two feedback loops, and the damping torque analysis based on mode decoupling is proposed to evaluate impact of power system interaction on the VSG. Firstly, the closed-loop interconnection model of power system is derived by using the power flow and output voltage/current of the DFIG-VSG as intermediate variables to find the damping paths. Secondly, the mode decoupling is proposed to solve the coupling of state variables of the DFIG and the VSG, and the analytical expression of the coefficient of damping torque provided by power system to the VSG is newly obtained. Finally, the simulation results are given to verify the effectiveness of the proposed algorithms.</p>

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Impact of DFIG integrated power system on VSG stability based on damping torque analysis with mode decoupling

  • 期刊论文

  • 发表日期：

    2025年6月7日

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  • Shenghu Li,
  • Junwei Gong

摘要

The doubly fed induction generator (DFIG) with the virtual synchronous generator (VSG) is used to maintain the stability of power system, thus the interaction between them affects the stability of VSG, which is not studied in the existing literature. In this paper, the closed-loop linearized model of power system is derived with the VSG as the feed-forward loop and the synchronous generator and the DFIG as two feedback loops, and the damping torque analysis based on mode decoupling is proposed to evaluate impact of power system interaction on the VSG. Firstly, the closed-loop interconnection model of power system is derived by using the power flow and output voltage/current of the DFIG-VSG as intermediate variables to find the damping paths. Secondly, the mode decoupling is proposed to solve the coupling of state variables of the DFIG and the VSG, and the analytical expression of the coefficient of damping torque provided by power system to the VSG is newly obtained. Finally, the simulation results are given to verify the effectiveness of the proposed algorithms.