Robust and efficient voltage stability margin computation using synchrophasors

Juan S. Giraldo, Jhon A. Castrillón, Carlos A. Castro

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)
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Results from two practical and fast methods to estimate systems' Maximum Loading Point (MLP) using Phasor Measurement Units (PMUs) are used in this paper as initial values for a robust and very efficient method that takes advantage of the geometric characteristics of the maximum loading hyperplane and uses the load flow with step size optimization (LFSSO) technique to estimate the system's proximity to the MLP. Both initializing methods are based on estimated Thévenin Equivalents (TEs) as seen from load buses using only local measurements. On the other hand, the latter method is based on successive load flow calculations of multiple operating points until the MLP is reached within a certain threshold defined by the user. The performance of the complete method (combination between the initializing methods and the LFSSO based method) was tested for some IEEE test systems and for a realistic Brazilian transmission system with more than 4,500 buses.

Original languageEnglish
Title of host publication2015 IEEE Power and Energy Society General Meeting, PESGM 2015
Place of PublicationPiscataway
PublisherIEEE Computer Society
Number of pages5
ISBN (Electronic)9781467380409
Publication statusPublished - 30 Sep 2015
Externally publishedYes
EventIEEE Power and Energy Society General Meeting, PESGM 2015 - Sheraton Denver Downtown Hotel, Denver, United States
Duration: 26 Jul 201530 Jul 2015


ConferenceIEEE Power and Energy Society General Meeting, PESGM 2015
Abbreviated titlePESGM 2015
Country/TerritoryUnited States
Other"Powering Up the Next Generation"
Internet address


  • cubic spline extrapolation
  • phasor measurement units
  • Power system voltage stability
  • step size optimization
  • voltage stability margin


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