Dynamic Thévenin equivalent and reduced network models for PMU-based power system voltage stability analysis

Research output: Research - peer-reviewJournal article – Annual report year: 2018

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Measurement-based real-time voltage stability assessment methods typically use a Thévenin Equivalent (TE) model. The TE is computed under the assumption that all generators and loads seen from an individual load-bus are constant during the time-window when measurements are obtained. This assumption does not hold in actual power systems. In fact, load changes at other load-buses result in variations on the voltage of a single-port equivalent model of the power system as seen from a load-bus. To consider these variations, this paper uses an interpolation method to develop a dynamic TE model from synchrophasor measurements, which is suitable for measurement-based real-time voltage stability assessment. In addition, a reduced network model is proposed to separate and quantify the impact of other loads and generators on the voltage stability of an interested load-bus in networks without full observability. The proposed method has been assessed through various simulation scenarios, and illustrated using actual field measurements.

Original languageEnglish
JournalSustainable Energy, Grids and Networks
Volume16
Pages (from-to)126-135
ISSN2352-4677
DOIs
StatePublished - 1 Dec 2018
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • PMU, Reduced network model, Voltage stability
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