送電損失を含むインバータ連系電力系統のIQCに基づく定態安定性条件

抄録

In this paper, a sufficient condition for the small-signal stability of power systems with lossy transmission lines, virtual synchronous generator (VSG) model grid-forming inverters and grid-following inverters is derived using the Integral Quadratic Constraints (IQC) framework. The analysis employs two system representations, referred to as the forward and inverse systems. The resulting stability condition comprises a circle criterion for the forward system at the DC gain and a phase condition for both systems over the remaining frequency range. Numerical results demonstrate that the proposed condition accurately captures the stability boundary when transmission line resistance is small.