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<p>The fact that the control of transient instability, the limitation of fault current, and the grid-forming capability need to be considered and solved together is recognized. However, the existing control strategies still have difficulties in the implementation of control strategies, the design of control parameters, and applying them to severe fault situations. Firstly, to solve the above problems, this article proposes an advanced additional control loop structure for the control of transient stability. Secondly, the enhanced control strategy, considering the limitation of fault current, the grid-forming capability, and transient stability, is achieved by introducing the dynamics of virtual resistors into the advanced additional control loop. Furthermore, the design rules for controlling parameters are established. Finally, the simulation outcomes validate the performance of the control strategy in single or multiple virtual synchronous generator systems.</p>

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Enhanced Transient Stability Control Strategy for VSG Taking into Account Fault Current and Grid-Forming Capability

  • 期刊论文

  • 发表日期：

    2025年10月15日

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  • Jiuliang Sun,
  • William Cai,
  • Qingbo Guo,
  • Yibo Li

摘要

The fact that the control of transient instability, the limitation of fault current, and the grid-forming capability need to be considered and solved together is recognized. However, the existing control strategies still have difficulties in the implementation of control strategies, the design of control parameters, and applying them to severe fault situations. Firstly, to solve the above problems, this article proposes an advanced additional control loop structure for the control of transient stability. Secondly, the enhanced control strategy, considering the limitation of fault current, the grid-forming capability, and transient stability, is achieved by introducing the dynamics of virtual resistors into the advanced additional control loop. Furthermore, the design rules for controlling parameters are established. Finally, the simulation outcomes validate the performance of the control strategy in single or multiple virtual synchronous generator systems.