Modeling of Inverter-Based Resources for Protection Studies Considering Momentary Cessation

This paper addresses the impact of the momentary cessation of Inverter-Based Resources (IBRs) on the protection of distribution systems. Momentary cessation is one of the require-ments in IEEE 1547 standard that requires IBRs to momentarily cease the energization when a severe disturbance (e.g., fault) occurs and large deviations in the system voltage or frequency are observed. This will enable IBRs to also accommodate the voltage-ride-through requirements since they can be energized again if the fault is cleared before the ride-through time. The momentary cessation modeling in PSS (R) CAPE and Matlab/Simulink is elab-orated. The paper highlights the impact of momentary cessation on the fault current and operation of time over current elements by simulating a modified version of the IEEE 123 node system in PSS (R) CAPE.