An Open-Source Implementation of Grid-Forming Converters Using Modelica.

The growing development of power-electronic based components such as renewable generation or HVDC links is deeply changing the nature of the transmission system dynamics. High percentage or even 100% power electronics power systems will raise new issues about the system stability in the near future. To ease this transition, System Operators have to work together and in collaboration with academics and manufacturers to anticipate the potential problems and find an efficient design for tomorrow's power systems. An important step in this direction has been done during the EU-funded MIGRATE project, in particular with the development of three different grid-forming converters. This paper aims at building over this work and proposes an implementation in Modelica, an open-source high-level modeling language, of the different converters controls as well as the development into Dyna omega o, an open-source simulation tool, of the classical 100% power electronics three-node test system used to validate these converters behavior. It paves the way for the development and exchange of other grid-forming converters models, as well as new studies on this topic, all in a completely open-source environment.