Sensitivity of estimated parameters in transformer thermal modeling

Oluwaseun Amoda, Daniel Tylavsky, Wesley Knuth, Gary McCulla

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

2 Scopus citations

Abstract

In this paper a model for predicting hottest-spot temperature in the windings of a transformer is presented. Three forms of the model that can be fitted to measured field data are derived. The three forms of the model are then fitted to measured data and the model parameters are estimated. Of the parameters estimated, the time constant, we find is inconsistently estimated across the phases of the transformerswhile the ultimate hot-spot rise over top-oil temperature at rated load is estimated consistently. It is shown, through sensitivity analysis of the model parameters and graphical plots, that the inconsistency in the estimation of the time-constant parameter is caused by sensitivity of the time-constant parameter to noise in the input data.

Original languageEnglish (US)
Title of host publication41st North American Power Symposium, NAPS 2009
DOIs
StatePublished - Dec 1 2009
Event41st North American Power Symposium, NAPS 2009 - Starkville, MS, United States
Duration: Oct 4 2009Oct 6 2009

Publication series

Name41st North American Power Symposium, NAPS 2009

Other

Other41st North American Power Symposium, NAPS 2009
CountryUnited States
CityStarkville, MS
Period10/4/0910/6/09

Keywords

  • Hottest-spot temperature
  • Model parameters
  • Sensitivity
  • Top-oil temperature
  • Transformer
  • Transformer thermal model

ASJC Scopus subject areas

  • Energy Engineering and Power Technology

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    Amoda, O., Tylavsky, D., Knuth, W., & McCulla, G. (2009). Sensitivity of estimated parameters in transformer thermal modeling. In 41st North American Power Symposium, NAPS 2009 [5484079] (41st North American Power Symposium, NAPS 2009). https://doi.org/10.1109/NAPS.2009.5484079