Detection of Electrical Tree Formation in XLPE Insulation through Applying Disturbed DC Waveforms
Artikel i vetenskaplig tidskrift, 2021

Initiation and growth of electrical trees can be linked to the development of partial discharge (PD) activity within an insulation system. We present in this paper changes in PD characteristics that appear during the electrical tree growth in a crosslinked polyethylene (XLPE) based insulation at different stages of its degradation. A DC voltage with superimposed high frequency component is applied to the material specimens for the detection and characterization of PD traces observed during the degradation. The method is flexible and offers a possibility to vary DC voltage level independently of the superimposed disturbance, its frequency and rise time, including rapid voltage steps. It also enables to create a phase-locked phase-resolved PD pattern (PRPD) facilitating various analyses of the characteristics. It is postulated that measurements of the changes in PD characteristics found under such excitations can be used for performing diagnostics and prognostics of material condition. This approach also implies new possibilities to evaluate different material concepts.

tree inception voltage

power electronics

polarity effect

partial discharge (PD)

XLPE

space charge energy

energy dissipation

time-to- failure

HVDC

treeing

Författare

Thomas Hammarström

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

Stanislaw Gubanski

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

IEEE Transactions on Dielectrics and Electrical Insulation

1070-9878 (ISSN)

Vol. 8 5 1669-1676

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Materialvetenskap

Ämneskategorier

Atom- och molekylfysik och optik

Annan elektroteknik och elektronik

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1109/TDEI.2021.009717

Mer information

Senast uppdaterat

2021-11-23