Uncertainty in real-time voltage stability assessment methods based on Thevenin equivalent due to PMU’s accuracy

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This article studies the influence of PMU’s accuracy in voltage stability assessment, considering the specific case of Th ́ evenin equivalent based methods that include wide-area information in its calculations. The objective was achieved by producing a set of synthesized PMU measurements from a time domain simulation and using the Monte Carlo method to reflect the accuracy for the PMUs. This is given by the maximum value for the Total Vector Error defined in the IEEE standard C37.118. Those measurements allowed to estimate the distribution pa- rameters (mean and standard deviation) of the studied voltage stability indices and grid transformation coefficients which have applications in voltage stability assessment. The obtained distri- butions have a direct impact in the number of samples needed for estimating system parameters and compromise between time- scale and uncertainty in those estimations is shown.
Original languageEnglish
Title of host publicationProceedings of 5th IEEE PES Innovative Smart Grid Technologies
Number of pages6
Publication date2014
Publication statusPublished - 2014
EventIEEE PES ISGT Europe 2014: 5th IEEE PES Innovative Smart Grid Technologies (ISGT) European 2014 Conference - Istanbul Technical University, Istanbul, Turkey
Duration: 12 Oct 201415 Oct 2014


ConferenceIEEE PES ISGT Europe 2014
LocationIstanbul Technical University


  • Voltage stability
  • Long term dynamics
  • Synchronized phasor measurements
  • Wide area monitoring
  • Voltage stability margin
  • Total vector error


SOSPO: Secure Operation of Sustainable Power Systems

Østergaard, J., Jóhannsson, H., Nielsen, A. H., Garcia-Valle, R., Yang, G., Lind, M., Blanke, M., Weckesser, J. T. G., Wittrock, M. L., Møller, J. G., Perez, A., Pedersen, A. S. & Zhang, X.


Project: Research


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