Details
| Original language | English |
|---|---|
| Article number | 9405769 |
| Pages (from-to) | 355 - 363 |
| Number of pages | 9 |
| Journal | IEEE Transactions on Dielectrics and Electrical Insulation |
| Volume | 28 |
| Issue number | 2 |
| Publication status | Published - 15 Apr 2021 |
Abstract
This paper presents an experimental study of the fundamental phenomena of progressive creeping discharge as well as the influences of pressboard ageing and voltage amplitude under divergent AC voltages. A ramp-stress test is used to determine the partial discharge inception voltage (PDIV) and the flashover voltage of oil/pressboard interface versus pressboard ageing. Constant-stress tests are carried out to investigate the partial discharge (PD) behaviors, the pressboard surface temperature, and the oil-dissolved gases of progressive creeping discharges. It is found that the pressboard ageing affects only the interface PDIV. The progressive creeping discharges concentrate at the triple-junction and comprises probably oil corona discharges and surface discharges in pressboard dimples. If no pressboard damage is present, the progressive discharges exhibit in general a constant PD pattern but a diminishing intensity, and nevertheless can be sustained for the severely-aged pressboards under strong voltages. The underlying causes are correlated with the competing effects of pressboard ageing on interface moisture and the triple-junction field intensification. Gas analyses indicate the hydrogen is the principal faulty gas and the Duval's Triangle diagnoses the progressive creeping discharges as either low-energy or high-energy discharge fault. No pressboard overheating is observed during the discharges.
Keywords
- aging, creeping discharge, field distribution, flashover, interface phenomena, moisture, partial discharge (PD)
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
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In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 28, No. 2, 9405769, 15.04.2021, p. 355 - 363.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Study of Oil/Pressboard Creeping Discharges under Divergent AC Voltage—Part 1: Fundamental Phenomena and Influencing Factors
AU - Zhou, Xin
AU - Werle, Peter
AU - Gockenbach, Ernst
AU - Shi, Hui Bin
AU - Kuhnke, Moritz
N1 - Funding Information: The first author would like to thank the Chinese Scholarship Council for sponsoring his Ph.D. program. Our grateful thanks are also due to Dr. Woche and Mr. Klatt from the Institut für Bodenkunde of Leibniz University of Hannover for their warm-hearted assistance in the microscope measurements.
PY - 2021/4/15
Y1 - 2021/4/15
N2 - This paper presents an experimental study of the fundamental phenomena of progressive creeping discharge as well as the influences of pressboard ageing and voltage amplitude under divergent AC voltages. A ramp-stress test is used to determine the partial discharge inception voltage (PDIV) and the flashover voltage of oil/pressboard interface versus pressboard ageing. Constant-stress tests are carried out to investigate the partial discharge (PD) behaviors, the pressboard surface temperature, and the oil-dissolved gases of progressive creeping discharges. It is found that the pressboard ageing affects only the interface PDIV. The progressive creeping discharges concentrate at the triple-junction and comprises probably oil corona discharges and surface discharges in pressboard dimples. If no pressboard damage is present, the progressive discharges exhibit in general a constant PD pattern but a diminishing intensity, and nevertheless can be sustained for the severely-aged pressboards under strong voltages. The underlying causes are correlated with the competing effects of pressboard ageing on interface moisture and the triple-junction field intensification. Gas analyses indicate the hydrogen is the principal faulty gas and the Duval's Triangle diagnoses the progressive creeping discharges as either low-energy or high-energy discharge fault. No pressboard overheating is observed during the discharges.
AB - This paper presents an experimental study of the fundamental phenomena of progressive creeping discharge as well as the influences of pressboard ageing and voltage amplitude under divergent AC voltages. A ramp-stress test is used to determine the partial discharge inception voltage (PDIV) and the flashover voltage of oil/pressboard interface versus pressboard ageing. Constant-stress tests are carried out to investigate the partial discharge (PD) behaviors, the pressboard surface temperature, and the oil-dissolved gases of progressive creeping discharges. It is found that the pressboard ageing affects only the interface PDIV. The progressive creeping discharges concentrate at the triple-junction and comprises probably oil corona discharges and surface discharges in pressboard dimples. If no pressboard damage is present, the progressive discharges exhibit in general a constant PD pattern but a diminishing intensity, and nevertheless can be sustained for the severely-aged pressboards under strong voltages. The underlying causes are correlated with the competing effects of pressboard ageing on interface moisture and the triple-junction field intensification. Gas analyses indicate the hydrogen is the principal faulty gas and the Duval's Triangle diagnoses the progressive creeping discharges as either low-energy or high-energy discharge fault. No pressboard overheating is observed during the discharges.
KW - aging
KW - creeping discharge
KW - field distribution
KW - flashover
KW - interface phenomena
KW - moisture
KW - partial discharge (PD)
UR - http://www.scopus.com/inward/record.url?scp=85104667200&partnerID=8YFLogxK
U2 - 10.1109/tdei.2020.009196
DO - 10.1109/tdei.2020.009196
M3 - Article
VL - 28
SP - 355
EP - 363
JO - IEEE Transactions on Dielectrics and Electrical Insulation
JF - IEEE Transactions on Dielectrics and Electrical Insulation
SN - 1070-9878
IS - 2
M1 - 9405769
ER -