Details
| Original language | English |
|---|---|
| Article number | 8484874 |
| Pages (from-to) | 1644-1650 |
| Number of pages | 7 |
| Journal | IEEE Transactions on Dielectrics and Electrical Insulation |
| Volume | 25 |
| Issue number | 5 |
| Publication status | Published - Oct 2018 |
Abstract
The acoustic emission signals produced by discharges of a point-plane electrode on the surface (surface discharge) of different oil-impregnated aramid pressboards are detected by a 150 kHz acoustic emission sensor mounted on the outside of the experimental tank sample. Numbers, maximum amplitudes and average amplitudes of acoustic bursts are measured via a digital signal processor device and evaluated. The effect of transition mechanism from spark to pseudoglow discharge on acoustic emission signals at different voltages is examined. The tracking patterns on the surface of four different aramid pressboard insulations are compared together by using Matlab image processing program. By experimental results, tracking patterns on the surface of the bulk impregnated pressboard insulation have a significant effect on the acoustic emission signals. Acoustic emission signals amplitudes decrease dramatically on damaged pressboards and cause so called silent PDs.
Keywords
- acoustic emission, dielectric barrier discharge, glow discharge, partial discharge, pseudo-glow discharge, silent PD, surface discharge
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 25, No. 5, 8484874, 10.2018, p. 1644-1650.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of carbonized patterns on oil-impregnated aramid pressboards surface on acoustic emission signals at inhomogeneous electric field
AU - Najafi, S. A.M.
AU - Gockenbach, Ernst
AU - Werle, Peter
AU - Borsi, H.
N1 - Publisher Copyright: © 1994-2012 IEEE. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/10
Y1 - 2018/10
N2 - The acoustic emission signals produced by discharges of a point-plane electrode on the surface (surface discharge) of different oil-impregnated aramid pressboards are detected by a 150 kHz acoustic emission sensor mounted on the outside of the experimental tank sample. Numbers, maximum amplitudes and average amplitudes of acoustic bursts are measured via a digital signal processor device and evaluated. The effect of transition mechanism from spark to pseudoglow discharge on acoustic emission signals at different voltages is examined. The tracking patterns on the surface of four different aramid pressboard insulations are compared together by using Matlab image processing program. By experimental results, tracking patterns on the surface of the bulk impregnated pressboard insulation have a significant effect on the acoustic emission signals. Acoustic emission signals amplitudes decrease dramatically on damaged pressboards and cause so called silent PDs.
AB - The acoustic emission signals produced by discharges of a point-plane electrode on the surface (surface discharge) of different oil-impregnated aramid pressboards are detected by a 150 kHz acoustic emission sensor mounted on the outside of the experimental tank sample. Numbers, maximum amplitudes and average amplitudes of acoustic bursts are measured via a digital signal processor device and evaluated. The effect of transition mechanism from spark to pseudoglow discharge on acoustic emission signals at different voltages is examined. The tracking patterns on the surface of four different aramid pressboard insulations are compared together by using Matlab image processing program. By experimental results, tracking patterns on the surface of the bulk impregnated pressboard insulation have a significant effect on the acoustic emission signals. Acoustic emission signals amplitudes decrease dramatically on damaged pressboards and cause so called silent PDs.
KW - acoustic emission
KW - dielectric barrier discharge
KW - glow discharge
KW - partial discharge
KW - pseudo-glow discharge
KW - silent PD
KW - surface discharge
UR - http://www.scopus.com/inward/record.url?scp=85054881901&partnerID=8YFLogxK
U2 - 10.1109/TDEI.2018.006939
DO - 10.1109/TDEI.2018.006939
M3 - Article
AN - SCOPUS:85054881901
VL - 25
SP - 1644
EP - 1650
JO - IEEE Transactions on Dielectrics and Electrical Insulation
JF - IEEE Transactions on Dielectrics and Electrical Insulation
SN - 1070-9878
IS - 5
M1 - 8484874
ER -