Investigation into pulse sequence analysis of PD features due to electrical tree growth in epoxy resin

Bojie Sheng, Victoria M. Catterson, Simon M. Rowland, Ibrahim Iddrissu

Research output: Contribution to conferencePaper

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Abstract

Electrical trees developed using point-plane samples have been investigated under three different voltage conditions: AC, AC with positive DC bias, and AC with negative DC bias. Visual observations mainly indicate two types of electrical tree progression from initiation to breakdown: “forward and backward” (FB) trees and "forward" (F) trees. FB trees can be observed in AC tests, while F trees occur in AC with DC bias tests. The difference between AC with negative DC bias and AC with positive DC bias is the growth of a rapid long branch prior to breakdown under negative DC bias conditions. Based on the pulse sequence analysis (PSA) technique applied to the PD data associated with electrical tree growth, the findings confirm that PSA curves under different voltage tests have different regions and PSA features can be indicators of tree growth.
Original languageEnglish
Number of pages4
Publication statusAccepted/In press - 5 May 2016
Event1st International Conference on Dielectrics - Montpellier, Montpellier, France
Duration: 3 Jul 20167 Jul 2016

Conference

Conference1st International Conference on Dielectrics
Abbreviated titleICD 2016
CountryFrance
CityMontpellier
Period3/07/167/07/16

Keywords

  • partial discharge
  • electrical tree
  • AC
  • AC with DC bias
  • pulse sequence analysis
  • epoxy resin

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