This letter develops an equivalent circuit model of a grid-forming (GFM) converter with a circular current limiter and analyzes its transient stability. It is revealed that the inner control loop can be simplified as a voltage source behind an equivalent resistor. Based on the developed model, theoretical analysis and experimental tests demonstrate that the transient stability of a P−fP-f droop-controlled GFM converter with the circular current limiter can be assured whenever there exist stable equilibrium points.

中文翻译：

---

用于暂态稳定分析的具有圆形限流器的并网变换器的等效电路模型


本文开发了带有环形限流器的并网 (GFM) 转换器的等效电路模型，并分析了其瞬态稳定性。结果表明，内部控制环路可以简化为等效电阻后面的电压源。基于所开发的模型，理论分析和实验测试表明，只要存在稳定平衡点，就可以保证具有圆形限流器的 P−fP-f 下垂控制 GFM 转换器的瞬态稳定性。