Power Flow-based Estimation of Short-Circuit Currents from Inverter-based Resources

This is the author's version of the work accepted for publication in IEEE Open Access Journal of Power and Energy (https://doi.org/10.1109/OAJPE.2026.3673646). From the previous version, this record adds: an overview of the control topology (figure 7), analyses of large systems, and a correction to the PPNR implementation that caused it to take significantly more time than needed to converge.