On-load tap-changer influence on frequency response analysis of transformer: A case study

Mehdi Bagheri, Svyatoslav Nezhivenko, B. T. Phung, Vahid Behjat

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

3 Citations (Scopus)

Abstract

Frequency Response Analysis (FRA) has been used as a comparative diagnosis method to explore mechanical defects in transformer. FRA is quite sensitive method and it can be influenced by different factors in transformer simply; however, this sensitivity will make it superior rather than other transformer winding deformation diagnosis techniques. This study has concentrated on tap-changer position influence on FRA signature. Practical study is performed on a 33 kV, 40 MVA three-phase core type transformer to examine on-load tap-changer (OLTC) position on frequency response spectrum in different frequency bands in Bode diagram. Oscillations in different frequency bands are discussed and their fluctuations are interpreted. Low-frequency band oscillations of FRA spectrum due to tap position changes are analyzed and discussed in detail. Distinguishing the tap-changer influence on FRA spectrum from winding deformation is quite crucial for FRA data interpretation.

Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages455-460
Number of pages6
Volume2017-January
ISBN (Electronic)9781509004096
DOIs
Publication statusPublished - Oct 6 2017
Event11th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 - Tinos, Greece
Duration: Aug 29 2017Sep 1 2017

Conference

Conference11th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017
CountryGreece
CityTinos
Period8/29/179/1/17

Keywords

  • Frequency Response Analysis (FRA)
  • OLTC
  • Transformer tap-changer
  • Transformer winding deformation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

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    Bagheri, M., Nezhivenko, S., Phung, B. T., & Behjat, V. (2017). On-load tap-changer influence on frequency response analysis of transformer: A case study. In Proceedings of the 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 (Vol. 2017-January, pp. 455-460). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/DEMPED.2017.8062394