Effect of High Voltage Impulses on Surface Discharge Characteristics of Polyethylene

Authors

  • Roya Nikjoo School of Electrical Engineering KTH Royal Institute of Technology
  • Nathaniel Taylor School of Electrical Engineering KTH Royal Institute of Technology
  • Hans Edin School of Electrical Engineering KTH Royal Institute of Technology

DOI:

https://doi.org/10.5324/nordis.v0i24.2291

Keywords:

PE, impulse, surface discharges, PD

Abstract

This paper investigates the influence of high voltage impulses on the surface discharge characteristics of polyethylene (PE) during subsequent application of 50 Hz AC voltage. The investigation is done on two types of PE to examine the generality of the phenomena. The effect of impulses on the surface discharge features of PE are studied for both cases of having either a streamer or flashover. For each case, the consecutive surface discharges behave differently when the insulation has been exposed to the transient voltages. 
The effect of impulses on surface discharge of PE is shown by the change of PD numbers and phase-resolved PD patterns. The results show a prompt change in the total number of discharges which decays with the time. After a surface flashover has occurred due to the impulse, the PD behaves quite differently compared to the similar case without flashover.

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Published

2017-09-04

Issue

No. 24 (2015): Proceedings of the 24th Nordic Insulation Symposium

Section

Articles

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