Improved technique for fault detection sensitivity in transformer maintenance test

Essam Al-Ammar, George G. Karady, Orlando P. Hevia

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

11 Scopus citations

Abstract

Transformer windings might be shifted because of short-circuit current, aging or impact during transportation. The shift modifies the dielectric space between the layers of the windings and may cause an insulation breakdown. Since transformers are expensive to replace, it is vital that their condition are determined accurately without having to dismantle the apparatus to inspect it visually. Generally, transformers test is performed for maintenance purposes, by either Low Voltage Impulse (LVI) test or Frequency Response Analysis (SFRA) test. Both methods have been adopted within the industrial applications. Nonetheless, they have drawbacks, including limited frequencies range for LVI test and time-consuming measurements for SFRA test. To obtain better signature analysis and to increase the detection sensitivity in the transformer maintenance test, this paper suggests a new input signal using a Random Pulse Sequence (RPS) in the transfer function analysis. The results of RPS test are compared against the LVI and SFRA tests to complete the assessments.

Original languageEnglish (US)
Title of host publication2007 IEEE Power Engineering Society General Meeting, PES
DOIs
StatePublished - Dec 1 2007
Event2007 IEEE Power Engineering Society General Meeting, PES - Tampa, FL, United States
Duration: Jun 24 2007Jun 28 2007

Publication series

Name2007 IEEE Power Engineering Society General Meeting, PES

Other

Other2007 IEEE Power Engineering Society General Meeting, PES
CountryUnited States
CityTampa, FL
Period6/24/076/28/07

Keywords

  • EMTP
  • FFT
  • Faults
  • LVI
  • Pulse
  • RPS
  • Random
  • SFRA
  • Signature analysis
  • Transfer function
  • Transformer

ASJC Scopus subject areas

  • Energy(all)

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  • Cite this

    Al-Ammar, E., Karady, G. G., & Hevia, O. P. (2007). Improved technique for fault detection sensitivity in transformer maintenance test. In 2007 IEEE Power Engineering Society General Meeting, PES [4275223] (2007 IEEE Power Engineering Society General Meeting, PES). https://doi.org/10.1109/PES.2007.385614