Summary

The global shift toward renewable energy is accelerating the use of HVDC transmission, with today’s point-to-point links expected to evolve into meshed AC/DC grids—making stability assessment increasingly critical, especially given the need for modular methods that can accommodate black-box models. This paper addresses this need by presenting two open-source tools for black-box and white-box frequency-domain small-signal stability analysis of AC/DC power systems. Both tools are introduced with an overview of their functionalities and use cases. A methodology is then proposed that integrates the two tools to incorporate EMT black-box models into fast stability analyses with analytical models. Two case studies demonstrate the accuracy and practical value of the approach. Overall, the proposed framework represents a decisive step toward automated and efficient derisking of detrimental interactions in evolving power systems.

Additional informations

Publication type Session Materials
Reference C4_10134_2026
Publication year
Publisher CIGRE
Country Belgium
Study committees
  • Power system technical performance (C4)
File size 1 MB
Price for non member 30 €
Price for member 30 €

Authors

KIRCHEIS Jan - KU Leuven, Etch/EnergyVille, Belgium; CIFUENTES GARCIA Francisco Javier - KU Leuven, Etch/EnergyVille, Belgium; BEERTEN Jef - KU Leuven, Etch/EnergyVille, Belgium

Open-source tools for frequency-domain stability analysis of black-box and white-box AC/DC grids