Adding solar PVs to a bus can significantly reduce the short-circuit (SC) current at the bus where the PV is connected, depending on how the fault and PV inverter are modeled. The key reason is that PV systems are usually inverter-based sources, and their fault-current contribution is much more limited than that of a conventional synchronous generator or the utility grid. For a short circuit at the connected bus: The grid normally supplies a large fault current. The PV inverter detects the abnormal...