On MIMO Stability Analysis Methods Applied to Inverter-Based Resources Connected to Power Systems

This paper presents a critical review of methods commonly employed in the literature for small signal stability analysis of inverter based resources (IBRs). It discusses the intended purposes of these methods and outlines both their proper and improper implementations. The paper provides insights into the applicability of these techniques, clarifies their inherent limitations, and discusses and illustrates common sources of misinterpretation.