Grid Forming Converters in Interconnected Systems - Final Results from the Joint Research Project VerbundnetzStabil

When integrating grid forming converters (GFC) into the power system, it is not just a matter of replacing the converter's current controller with a voltage controller; all aspects of power system dynamics have to be considered in order to design a suitable behavior of GFC. This is necessary in order to fully replace the grid forming and grid stabilizing properties of synchronous generators with converters. Within the joint research project VerbundnetzStabil the partners KACO new energy, TransnetBW, University of Stuttgart and Fraunhofer ISE investigated the stability of interconnected power systems with a high penetration of converters over the past four years. This paper summarizes the work of the project team and their major findings. Keywords— grid forming converters; converter control; power system stability; converter based generation