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Dielectric performance of silicone oil-paper composite insulation system under thermal aging

  • Li Shuang Cao
  • , Bin Xiang
  • , Wen Dong Li
  • , Yan Hui Wei
  • , Jun Bo Deng
  • , Zhi Yuan Liu
  • , Satoru Yanabu
  • , Ming Dong
  • , Guan Jun Zhang
  • Xi'an Jiaotong University

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

Abstract

Silicone oil is a promising alternative insulating liquid especially for the sites where fireproofing and environment protection must be considered. In this paper, the chemical and dielectric performance of silicone oil-paper composite insulation system under thermal aging is discussed. Two kinds of oil-paper systems are tested: mineral oil and silicone oil (Shin-Etsu Chemical KF-96-20 Lower viscosity fluid). In this study, mineral oil is used as the comparison sample. The accelerated aging process is at 140C in nitrogen. Aging samples with the aging duration of 250 hours, 500 hours and 750 hours and 1000 hours are tested. Experimental results indicate that the silicone oil has much lower acidity content and dielectric loss compared to the mineral oil. New mineral has a little higher AC breakdown voltage compared to silicone oil. For both silicone oil and mineral oil, with the increase of impurities such as water and solid particles during the aging process, the AC breakdown voltage decreases slightly. Acidic materials generated during aging process have little influence on the AC breakdown voltage. Different from the mineral oil whose impulse breakdown voltage decreases significantly with the increase of aging time, however, the silicone oil's negative impulse breakdown voltage of different aging time almost keeps the same.

Original languageEnglish
Title of host publicationProceedings of the 2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2015
PublisherIEEE Computer Society
ISBN (Electronic)9781467381321
DOIs
StatePublished - 12 Jan 2016
EventIEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2015 - Brisbane, Australia
Duration: 15 Nov 201518 Nov 2015

Publication series

NameAsia-Pacific Power and Energy Engineering Conference, APPEEC
Volume2016-January
ISSN (Print)2157-4839
ISSN (Electronic)2157-4847

Conference

ConferenceIEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2015
Country/TerritoryAustralia
CityBrisbane
Period15/11/1518/11/15

Keywords

  • Silicone oil
  • breakdown voltage
  • thermal aging

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