A Relationship Function Between Loadability Margin and OMIB Simulation Results for Heavy Loading Power System

Abstract

A novel voltage stability relation function based on an one-machine-infinite-bus (OMIB) equivalent was proposed, which shows detailed relationship between voltage stability and transient stability. Since the OMIB hybrid simulation has the ability to take into consideration any kind of system detailed dynamic model, the proposed voltage stability relation function embodies all the system’s nonlinearity, which is stricter than traditional static voltage stability indexes. The feasibility and validity of the proposed index were demonstrated on 9-bus, 14-bus, 39-bus and 692-bus systems.