Effect of harmonics on pulse sequence analysis plots from electrical trees

Nur Hakimah Binti Ab Aziz, Victoria Catterson, S.M. Rowland, S. Bahadoorsingh

Research output: Contribution to conferencePaper

2 Citations (Scopus)
142 Downloads (Pure)

Abstract

This paper investigates the effect of harmonic pollution on the Pulse Sequence Analysis (PSA) pattern. Partial discharge data was captured from electrical trees growing in epoxy resin in the presence of different harmonic regimes. These regimes included 50Hz waveforms polluted with 3rd, 5th, 7th, 11th, 13th, 23rd and 25th order harmonics, at varying levels of Total Harmonic Distortion (THD) and waveshape factor (KS). In this paper, the data has been analyzed using PSA by plotting the external voltage of consecutive PD pulses (un vs un-1). Under pure 50 Hz conditions, four clusters of data points can be identified in the plot and the formation of the clusters is discussed. Further investigation was performed by running the samples to breakdown. The results show that even in the presence of harmonics, an increase of PD occurrence and phase distribution translates into the expected PSA pattern, where clusters of data points merge to form a 45° straight line. Therefore, PSA is relatively immune to the effects of harmonic distortion when considering it only as an indicator of breakdown.
Original languageEnglish
Number of pages4
Publication statusPublished - Oct 2014
Event2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena - Des Moines, United States
Duration: 19 Oct 201422 Oct 2014

Conference

Conference2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena
CountryUnited States
CityDes Moines
Period19/10/1422/10/14

Keywords

  • harmonic pollution
  • pulse sequence analysis
  • PSA
  • electrical trees
  • harmonic distortion

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  • Cite this

    Hakimah Binti Ab Aziz, N., Catterson, V., Rowland, S. M., & Bahadoorsingh, S. (2014). Effect of harmonics on pulse sequence analysis plots from electrical trees. Paper presented at 2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena, Des Moines, United States.