Ferroresonance characteristics in unsymmetrical flux distribution of 150 KV three phase transformer

I. Made Yulistya Negara, I. Gusti Ngurah Satriyadi Hernanda, Dimas Anton Asfani, Daniar Fahmi, Yusrizal Afif, Mochammad Wahyudi

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

8 Citations (Scopus)


Iron core of transformer somehow always have non-linear hysteresis characteristics. Generally, they are symmetry on their three legs of iron core. However, it may also suffer from unsymmetrical flux hysteresis characteristic due to inappropriate or special design. On the other hand, transformer is very sensitive to ferroresonance if it works on saturation area of its flux characteristic. Therefore, the effect of unsymmetrical flux distribution in three phases 150/20 kV power transformer on ferroresonance phenomenon was studied in this paper. Ferroresonance characteristics of symmetrical flux hysteresis of transformer were simulated using ATP/EMTP and the results were compared with the one of unsymmetrical. The result showed that at symmetrical condition, the overvoltage due to ferroresonance reached 389.81 kV on primary side and 23.54 kV on secondary one. Current response showed that current on primary and secondary sides increased until 1516.6 A and 2040.1 A, respectively. Under unsymmetrical condition the overvoltage became higher of about 2.27% from symmetrical condition. Different characteristics of ferroresonance were found on the transformer with smaller flux hysteresis because one leg was already work on its saturation area.

Original languageEnglish
Title of host publicationTENCON 2017 - 2017 IEEE Region 10 Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9781509011339
Publication statusPublished - 19 Dec 2017
Event2017 IEEE Region 10 Conference, TENCON 2017 - Penang, Malaysia
Duration: 5 Nov 20178 Nov 2017

Publication series

NameIEEE Region 10 Annual International Conference, Proceedings/TENCON
ISSN (Print)2159-3442
ISSN (Electronic)2159-3450


Conference2017 IEEE Region 10 Conference, TENCON 2017


  • ferroresonance
  • overvoltage


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