A voltage stability monitoring algorithm using a few PMUs in metropolitan area

Sangwook Han, Byongjun Lee

Research output: Contribution to journalArticlepeer-review

2 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 becomes one of achievements we can obtain from PMUs. It is very important to select the method appropriate to the KEPCO system since there are many voltage stability indices. In the paper, we propose an advanced WAVI (Wide Area Voltage Stability) for monitoring dynamic voltage stability. It reflects the PMU installation plan of KEPCO, thus it is suitable for KEPCO system specially. The salient features of the proposed index are; i) it uses only PMU measurements without coupling with EMS data, ii) it is computationally. unburden so that it can be applied to real-time situation. The proposed index is applied to the KEPCO test system and the result shows that it successfully predicts voltage instability through the comparative studies.

Original languageEnglish
Pages (from-to)2328-2334
Number of pages7
JournalTransactions of the Korean Institute of Electrical Engineers
Issue number12
Publication statusPublished - 2009 Dec


  • PMU
  • Real-Time
  • Voltage Stability
  • Wide Area Voltage Stability Index(WAVI)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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