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dc.contributor.authorLei, Weiqun-
dc.contributor.authorWu, Kai-
dc.contributor.authorWang, Ya-
dc.contributor.authorCheng, Yonghong-
dc.contributor.authorZheng, Xiaoquan-
dc.contributor.authorDissado, L. A.-
dc.contributor.authorDodd, S. J.-
dc.contributor.authorChalashkanov, N. M.-
dc.contributor.authorFothergill, Chong-
dc.contributor.authorZhang, Wenpeng-
dc.identifier.citationIEEE Transactions on Dielectrics and Electrical Insulation, 2017, 24 (4), pp. 2268-2270en
dc.description.abstractA DC step test and a number of DC life endurance tests have been performed at a temperature of 20°C on 200 μm thick samples of a commercial (AC grade) XLPE and its nanocomposite which is intended for DC use. It was found that the breakdown strength of the nano-composite on the DC step test was considerably larger than that of the unfilled XLPE. However, the endurance tests showed that the difference between the characteristic lifetime of the nano-composite and its unfilled base polymer reduced as the applied field was reduced and the lifetimes became essentially the same when the applied field was 130 kV/mm, which is the lowest for which we have data at present. The life line was analyzed as an inverse power law and gave median life exponents of n = 10.76 for the nano-composite and n = 13.58 for the XLPE. These values are consistent with estimates from step tests on the same materials that have been recently published, and imply that the nano-composite will perform worse than the AC grade XLPE as a DC insulator if the inverse power law continues to be obeyed down to service fields.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.rightsCopyright © IEEE, 2017. Deposited with reference to the publisher’s open access archiving policy.en
dc.titleAre Nano-composites really better DC Insulators? A study using silica nanoparticles in XLPEen
dc.typeJournal Articleen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERINGen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineeringen
Appears in Collections:Published Articles, Dept. of Engineering

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