Power Transformer Hysteresis Measurement

Dennis Albert*, Philipp Schachinger, Alexander Pirker, Christoph Engelen, Fredi Belavic, Gerald Leber, H. Renner

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

Abstract

The state-of-the-art in power transformer condition assessment includes different electrical measurement to assess the condition of e.g. the windings, bushings or the transformer core. This work proposes a hysteresis measurement to supplement the available diagnostic for transformer cores. When dealing with hysteresis measurements, remanent flux in the transformer needs to be reduced to a minimum in order to reduce e. g. inrush currents or the transformer sound level after energizing. Different laboratory and field measurements of a DC hysteresis showed that the available demagnetization procedures are not sufficient for all the tested transformer cores. As a consequence, two additional demagnetization procedures are proposed. These demagnetization procedures are based on an established demagnetization algorithm implemented in portable transformer test devices. A supplement saturation/hysteresis is proposed to mitigate the inter-phase magnetic coupling of multi-limb multi-winding power transformers. This saturation/hysteresis test can be performed at rated
frequency with a sufficient large power source or as DC measurement with a portable transformer test device. In addition to the condition assessment the hysteresis measurement could also be used for power transformer modelling. The DC hysteresis measurement approach was tested with four different transformer types and different rated power from 50 kVA to 300 MVA.
Original languageEnglish
Title of host publicationEnInnov2022 - 17. Symposium Energieinnovation
Subtitle of host publicationFUTURE OF ENERGY - Innovationen für eine klimaneutrale Zukunft
Place of PublicationGraz
PublisherVerlag der Technischen Universität Graz
Pages109-110
ISBN (Electronic)9783851259162
ISBN (Print)9783851259155
DOIs
Publication statusPublished - 17 Feb 2022
Event17. Symposium Energieinnovation : Future of Energy - Innovationen für eine klimaneutrale Zukunft: EnInnov 2022 - Virtuell, Austria
Duration: 16 Feb 202218 Feb 2022
https://www.tugraz.at/events/eninnov2022/home/

Conference

Conference17. Symposium Energieinnovation : Future of Energy - Innovationen für eine klimaneutrale Zukunft
Abbreviated titleEnInnov2022
Country/TerritoryAustria
CityVirtuell
Period16/02/2218/02/22
Internet address

ASJC Scopus subject areas

  • Engineering(all)
  • Electrical and Electronic Engineering

Fields of Expertise

  • Sustainable Systems

Treatment code (Nähere Zuordnung)

  • Experimental

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