Systematic method to identify an area of vulnerability to voltage sags

Chang Hyun Park, Gilsoo Jang

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


This paper describes a systematic method for determining an area of vulnerability (AOV) to fault induced voltage sags. The concept of an AOV is very useful for evaluating vulnerability and the relationship between sensitive loads and system voltage sag performance. In general, a system performance assessment pertaining to voltage sags requires a determination of AOVs for system buses. Because voltage sags can be caused by remote faults in a transmission system, to completely identify an AOV, a large part of the power system including adjacent circuits and remote supply systems should be considered. Therefore, accurately calculating critical points and identifying AOVs are challenging tasks. In this paper, we present an effective numerical method to determine an accurate AOV in a large scale power system and to overcome limitations of other well-known methods.

Original languageEnglish
Article number7728108
Pages (from-to)1583-1591
Number of pages9
JournalIEEE Transactions on Power Delivery
Issue number3
Publication statusPublished - 2017 Jun

Bibliographical note

Publisher Copyright:
© 2016 IEEE.


  • Area of vulnerability (AOV)
  • golden section search
  • power quality
  • voltage sag assessment
  • voltage sags

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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