Open-Source PSCAD Grid-Following and Grid-Forming Inverters and A Benchmark for Zero-Inertia Power System Simulations

This paper presents open-source, flexible, and easily-scalable models of grid following and grid forming inverters for the PSCAD software platform. The models are intended for system integration studies, particularly transient stability analyses of power systems with a high penetration of inverter-based generation. To verify the model functionality, they are implemented in a IEEE 9-bus system in a zero-inertia operational scenario of 100% inverter-based generation where the presence of grid-forming inverters are necessary. The models, including the 9 bus network, have been made available open source at the PyPSCAD NREL GitHub page (https://github.com/NREL/PyPSCAD).