Real time wide area voltage stability index in the Korean metropolitan area

Sangwook Han, Byongjun Lee, Sangtae Kim, Younghwan Moon

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Through the development of phasor measurement units (PMU), various aspects of power system dynamic behavior could be monitored and diagnosed. Monitoring dynamic voltage stability has become one of the achievements we can obtain from PMUs. It is very important to select the most appropriate method for the Korea Electric Power Corporation (KEPCO) system since there are many voltage stability indices. In this paper, we propose an advanced WAVI (Wide Area Voltage Stability) that is well suited for the purposes of monitoring the dynamic voltage stability of KEPCO's PMU installation plan. The salient features of the proposed index are: i) it uses only PMU measurements without coupling with EMS data; ii) it is computationally unburdened and can be applied to real-time situations. The proposed index is applied to the KEPCO test system and the results show that it successfully predicts voltage instability through comparative studies.

Original languageEnglish
Pages (from-to)451-456
Number of pages6
JournalJournal of Electrical Engineering and Technology
Issue number4
Publication statusPublished - 2009 Dec


  • Phasor measurement unit
  • Synchro-phase
  • Wide area voltage stability index

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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