Comparative Study of Model Order Reduction Criteria for Interaction Studies in Converter-Dominated Power Systems with Cable Networks and Partial Black-Box Subsystems

This paper presents a comparative study of model order reduction (MOR) criteria for interaction analysis in converter-dominated power systems. Multiple reduction metrics are evaluated on a common benchmark system to assess their accuracy and suitability for eigenvalue-based interaction studies. We first review representative MOR criteria in both timeand frequency-domain frameworks, including eigenvalue-sensitivity–based methods (e.g., participation factor analysis) and Gramian-based techniques.