Network-free voltage stability assessment of power systems using phasor measurements

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

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

1 Citation (Scopus)
10 Downloads (Pure)


In this paper two different methods to estimate the proximity of the system to the Maximum Loading Point (MLP) are proposed. They are compared with a specific method recently published that uses the Cubic Spline Extrapolation (CSE) for estimating the MLP. All three methods are based on tracking the Thévenin Equivalent (TE) of the system as seen from the load buses using data from Phasor Measurement Units (PMUs). The main advantages of this class of methods are their simplicity and computational efficiency since they are independent from network's model and they are only based on local measurements, making them a very good option for both Wide-Area Monitoring Systems (WAMS) and local applications. The methods are intended to be used in real time environments, and take into account some operational aspects like system's conditioning and nonlinearities introduced by reactive power generation limits.

Original languageEnglish
Title of host publication2015 IEEE Eindhoven PowerTech, PowerTech 2015
ISBN (Electronic)9781479976935
Publication statusPublished - 31 Aug 2015
Externally publishedYes
EventIEEE Eindhoven PowerTech, PowerTech 2015 - Eindhoven, Netherlands
Duration: 29 Jun 20152 Jul 2015


ConferenceIEEE Eindhoven PowerTech, PowerTech 2015


  • Cubic Spline Extrapolation
  • Phasor measurement units
  • Power system voltage stability
  • voltage stability margin
  • Wide-Area Monitoring Systems

Cite this