Open-Source EMT Model of Grid-Forming Converter with Industrial Grade SelfSync and SelfLim Control

The declining inertia due to fewer synchronous machines in modern power systems requires power electronic converters with grid-forming properties. Accurate dynamic models of such converters are required to study the influence of the grid-forming control on power system stability. Vendor-specific models are generally not disclosed. An open-source EMT model of an industrial grade controller called SelfSync, including a current limitation controller called SelfLim, is provided in the widely used simulation software DIgSILENT PowerFactory in this work. The controller is compared to a generic model in various study cases using the FNN grid-forming test system and the Nordic 72-bus system. It is shown that the controller is suitable for the analysis of complex contingencies.