Creeping discharges over pressboard immersed in jatropha curcas methyl ester and mineral oils

Henry B.H. Sitorus, Abderrahmane Beroual, Rudy Setiabudy, Setijo Bismo

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

19 Citations (Scopus)

Abstract

Due to their high biodegradability, non-toxicity and higher fire safety guarantee, vegetable-based oils are considered today as a potential substitute for mineral and synthetic liquids for electrical insulation and especially in high voltage power transformers. However most of known vegetable oils are derived from food materials (rape-seeds, sunflower, palm, olive). And one has to be vigilant to the fact that the replacement of mineral oil which is a petroleum-based product by natural ester fluids based on 'renewably sourced' vegetable oils, does not create new problems as this could cause global food crisis due to diversion of food. An interesting product can be jatropha curcas oil extracted from jatropha curcas plants ('miracle tree') which is non-food crops. This paper presents an experimental study of creeping discharges propagating over pressboard of different thicknesses immersed in jatropha curcas methyl ester oil (JMEO) and mineral oil (MO) under positive and negative lightning impulse voltages (1.2/50 μs), using two divergent electrode configurations (electrode point perpendicular and tangential to pressboard). It is shown that the thickness of pressboard significantly influences the characteristics of creeping discharge and especially the stopping (final) length Lf and the density of branches. For a given thickness, Lf increases with the voltage and decreases when the thickness increases. Lf is longer when the point is positive than with a negative point. For a given voltage and thickness of pressboard, the values of Lf in mineral oil and JMEO are very close.

Original languageEnglish
Title of host publicationICPADM 2015 - 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages152-155
Number of pages4
ISBN (Electronic)9781479989034
DOIs
Publication statusPublished - 8 Oct 2015
Event11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015 - Sydney, Australia
Duration: 19 Jul 201522 Jul 2015

Publication series

NameProceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
Volume2015-October

Conference

Conference11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015
Country/TerritoryAustralia
CitySydney
Period19/07/1522/07/15

Keywords

  • creeping discharge
  • discharge current)
  • jatropha curcas methyl ester oil (JMEO)
  • mineral oil
  • pressboard
  • stopping length

Fingerprint

Dive into the research topics of 'Creeping discharges over pressboard immersed in jatropha curcas methyl ester and mineral oils'. Together they form a unique fingerprint.

Cite this