Tracking and surface discharge at the oilߝpressboard interface
Reads0
Chats0
TLDR
A different approach to the study of surface tracking reveals a new view of the oil-pressboard interface and suggests a link between the electric double layer and the boundary layer as discussed by the authors.Abstract:
A different approach to the study of surface tracking reveals a new view of the oil-pressboard interface and suggests a link between the electric double layer and the boundary layer.read more
Citations
More filters
Journal ArticleDOI
The Influence of Pressure on the Discharge along Oil-Paper Interface under AC Stress
TL;DR: In this article, the influence of hydrostatic pressure on the discharge along the oil-paper interface under AC voltage, especially for the normal operating condition and breakdown, was explored, and an experimental platform was set up to record the partial discharge parameters of the test sample under different hydrostatic pressures, while the applied AC voltage was increased to final flashover voltage step by step.
Proceedings ArticleDOI
Comparison of partial discharge inception voltages for ester and mineral oils under divergent fields
Andrea Cavallini,C. G. Azcarraga +1 more
TL;DR: In this paper, the PDIV of two commercially available fluids: a natural ester and mineral oil were compared with simple point-to-plane electrodes, independently of the gap length.
Proceedings ArticleDOI
Characteristics of leakage current during surface disharge at the oil-pressboard interface
TL;DR: In this paper, a long period of electrical stress applied to a surface discharge experiment using a needle-bar electrode configuration has led to the formation of full-gap white marks on the pressboard surface that bridged the needle tip and earth bar.
Journal ArticleDOI
Study of Oil/Pressboard Creeping Discharges under Divergent AC Voltage—Part 1: Fundamental Phenomena and Influencing Factors
TL;DR: In this article, 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.
Proceedings ArticleDOI
Study on the influence of gases on white marks and carbonized tracks generated by partial discharge in transformer oil-paper insulation
TL;DR: In this paper, a needle-plate electrode configuration was set in laboratory to investigate the relationship among the gases white marks and carbonized tracks. And all the pressboards were dissected layer-by-layer so as to observe carbonised tracks inside the pressboard.
References
More filters
Proceedings ArticleDOI
Effective methods of assessment of insulation system conditions in power transformers: a view based on practical experience
V. Sokolov,Z. Berler,V. Rashkes +2 more
TL;DR: In this article, a functional failure model of power transformer insulation and possible effective methods of the insulation condition assessment are discussed based on practical experience, and a substantial drop in the dielectric safety margin under the impact of moisture, oil by-products, contaminating particles, paper insulation aging and partial discharge activity.
Journal ArticleDOI
Research in Japan on the tracking phenomenon of electrical insulating materials
TL;DR: This review describes the development and status of tracking research in Japan and some techniques for improving the tracking resistance of outdoor polymer insulating materials will be discussed.
Proceedings ArticleDOI
The static electrification phenomena in power transformers
TL;DR: In this article, the authors present several failures of large power transformers attributed to the static electrification phenomena that have been brought to the attention of Texas Power & Light Company, two of these failures were ours.
Journal ArticleDOI
The electrification phenomena in power transformers
TL;DR: In this paper, the failure of large power transformers has been attributed to static electrification phenomena since December 1983, and methods for identifying problem units and for reducing static electricity are discussed.
Related Papers (5)
Creepage discharge on insulation barriers in aged power transformers
Surface tracking on pressboard in natural and synthetic transformer liquids under AC stress
Xiao Yi,Zhongdong Wang +1 more
Effective methods of assessment of insulation system conditions in power transformers: a view based on practical experience
V. Sokolov,Z. Berler,V. Rashkes +2 more