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Statistical Analysis of Partial Discharges from Electrical Trees Grown in a Flexible Epoxy Resin

By Stephen J. Dodd, Nikola M. Chalashkanov and John C. Fothergill


Electrical treeing is a long-term degradation mechanism in polymeric insulation, which can lead to electrical failure of HV insulation systems. The rate at which trees grow across the insulation depends on the PD activity occurring within them and hence the detection of the onset of electrical treeing could be established by PD monitoring. In this paper, a statistical analysis of the partial discharges detected during the growth of trees in an epoxy resin will be reported. The aim of this work was to provide additional insight into the physical mechanisms that lead to the observed fluctuations in the partial discharge activity. The results demonstrate interesting correlations between a number of statistical parameters, such as average discharge magnitude and standard deviation in the partial discharge amplitudes. These correlations could also be related to physical parameters such as the applied voltage magnitude and the measured power dissipation due to the partial discharges occurring during tree growth. The implications of this work for deterministic methodologies for the simulation of tree growth as well as for condition monitoring using feature recognition strategies for the early detection of tree growth will be discussed.Peer-reviewedPost-printIEEE Conference on Electrical Insulation and Dielectric Phenomena, Quebec City, Canad

Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Year: 2008
DOI identifier: 10.1109/CEIDP.2008.4772838
OAI identifier:

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  1. (2000). A deterministic model for branched structures in the electrical breakdown of solid polymeric dielectrics”, doi
  2. (2004). An investigation of partial discharge energy dissipation and electrical tree growth in an epoxy resin”, doi
  3. (1990). Automized Recognition of Partial Discharges in Cavities”, doi
  4. (1991). Computer-aided recognition of partial discharges using statistical tools.
  5. (1995). Development of Computer-based Measurements and their Application to PD Pattern Analysis”, doi
  6. (1992). Electrical Degradation and Breakdown in Polymers. IEE Materials and devices series, London: Peter Peregrinus Ltd. on behalf of the IEE.
  7. (1995). Evidence for deterministic chaos as the origin of electrical tree breakdown structures in polymeric insulation”, doi
  8. (1976). Handbook of statistical distributions. doi
  9. (2000). Model for Partial Discharges Associated with Treeing Breakdown II: Tree Growth Affected by PD”, doi
  10. (2008). PD Pattern Recognition Using ANFIS”, accepted for publishing doi
  11. (2001). Simulation of partial discharges in conducting and non-conducting electrical tree structures”, doi
  12. Statistical Analysis of Partial Discharges from Electrical Trees Grown in a Flexible Epoxy Resin doi
  13. (2005). Trends in Partial Discharge Pattern Classification: A Survey”, doi

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