Estimation of goodness of fit of synchrophasors during transient faults

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


Synchrophasor measurements are a useful tool, in particular for understanding dynamic or transient phenomena on large electrical systems. However, synchrophasors are only truly valid when the system is time invariant, that being when the frequency and magnitude of the waveforms is cyclical and continuous from one cycle to the next. This paper considers a metric for determining the quality of synchrophasors, Goodness of Fit (GoF). This metric returns a single scalar value which indicates how closely the estimated synchrophasors compare with the sampled values from which they are computed. The GoF metric is applied to empirical data obtained during a transient event on the power system of the island of Ireland. It is found that the metric returns a value indicating that the synchrophasors are of good quality before the transient event commences, and correctly indicates when the synchrophasors are no longer a good match to the sampled values. The authors propose that this technique should be added to PMUs and can be immediately incorporated with existing PMU communications. additionally, as the GoF metric indicates when the sampled data is not a good sinusoidal fit, GoF can itself be useful for triggering captures of sampled values for post analysis.

Original languageEnglish
Title of host publication2017 IEEE Power and Energy Society General Meeting (PESGM 2017): Proceedings
PublisherIEEE Computer Society
Number of pages5
ISBN (Electronic)9781538622124
Publication statusPublished - 01 Feb 2018
Event2017 IEEE Power and Energy Society General Meeting, PESGM 2017 - Chicago, United States
Duration: 16 Jul 201720 Jul 2017

Publication series

NameIEEE Power and Energy Society General Meeting
ISSN (Print)1944-9925
ISSN (Electronic)1944-9933


Conference2017 IEEE Power and Energy Society General Meeting, PESGM 2017
Country/TerritoryUnited States


  • Measurement Quality
  • PMU
  • Sampled Values
  • Synchrophasor
  • Transients

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering


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