Q:   How does OneLiner compute the fault solution when the network model includes nonlinear IBR models?

A:   The following flow chart outlines the basic solution framework within OneLiner.

First the prefault voltage phasors are determined for all buses in the network using the Prefault Voltage option selected in the Fault Simulation options.  Then the fault solution iterations begin with the prefault solution as the initial condition.  The fault solution iterations proceed until convergence tolerances are met or the maximum number of iterations is exceeded.