Analytical Prediction of Voltage Collapse in Current-Limited Grid-Forming Inverters
The paper develops an analytical framework to predict voltage collapse boundaries for grid-forming inverters using a circular current limiter (CCL). It models the inverter as switching between normal and current-limited modes, deriving closed-form expressions for activation boundaries. The framework determines whether a stable operating point persists or collapses after the CCL is activated, validating results through dynamic modeling and simulations.