Power Flow Screening for A/C Motor Stalling in Fault-Induced Delayed Voltage Recovery

摘要

Recent advancement in modeling the stalling of single-phase Air Conditioner (A/C) motors in bulk electric power system studies provides utilities an effective way to identify and mitigate Fault-Induced Delayed Voltage Recovery (FIDVR). Several limitations still exist for adopting the stalling model and its assumptions in transmission planning analysis. One is the bifurcation of power flow conditions a FIDVR may introduce to the post-fault system in contingency analysis. This paper discusses such an analysis gap, and proposed a fast power flow based screening method to better capture A/C motor stalling and FIDVR condition before performing dynamic simulations. The method also adds flexibility to transmission planners to handle aggregate load behavior with the variation of motor characteristics and protection settings, which are not normally addressed in transmission planning stage.