Voltage stability indices - A review and a new classification

Abstract

This paper is oriented to present a review of the main approaches commonly used to obtain voltage stability indices in electric power systems.  Starting from classifications previously presented, the authors propose a complete review including  several  subcategories,  which  help  to  have  a  better  understanding  of  these  approaches.  As  strategy  to  adequately present this research, a chronologically ordered description and a classification of the most relevant characteristics  of  these  proposals,  which  are  aimed  to  obtain  the  voltage  stability  indexes  in  a  time  period  from  1986 to 2012, is detailed analyzed. The considered classification criterion is related to the information requirements of each one of the reviewed approaches. Additionally, an analysis and a discussion of the evolution of the indexes proposals  considering  the  new  available  metering  equipment  are  developed.    Finally,  this  review  is  useful  as  a  reference for discussions related to methodologies associated to voltage stability indexes for electric power systems.