Electrical Detection of Creeping Discharges over Insulator Surfaces in Atmospheric Gases under AC Voltage Application

Creeping discharges over insulator surfaces have been related to the presence of triple junctions in compressed gas insulated systems. The performance of dielectric materials frequently utilised in gaseous insulating high voltage applications, stressed under triple junction conditions, has been an i...

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Bibliographic Details
Published in:Energies (Basel) 2019-08, Vol.12 (15), p.2970
Main Authors: Michelarakis, Michail, Widger, Phillip, Beroual, Abderrahmane, Haddad, Abderrahmane (Manu)
Format: Article
Language:English
Subjects:
AC voltage
Atmospheric gases
Carbon dioxide
creeping discharge
Drying
Electric fields
Electric power
Electrodes
Engineering Sciences
epoxy resin
flashover voltage
Funding
Gases
Geometry
Grants
High voltage
Isopropanol
Isopropyl alcohol
Plasmas
point-plane
polytetrafluoroethylene (PTFE)
Pressure
Propagation
Room temperature
Rubber
Scholarships & fellowships
Sensors
Silicone rubber
Silicones
Vacuum
Voltage
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Summary:Creeping discharges over insulator surfaces have been related to the presence of triple junctions in compressed gas insulated systems. The performance of dielectric materials frequently utilised in gaseous insulating high voltage applications, stressed under triple junction conditions, has been an interesting topic approached through many different physical perspectives. Presented research outcomes have contributed to the understanding of the mechanisms behind the related phenomena, macroscopically and microscopically. This paper deals with the electrical detection of creeping discharges over disc-shaped insulator samples of different dielectric materials (polytetrafluoroethylene (PTFE), epoxy resin and silicone rubber) using atmospheric gases (dry air, N2 and CO2) as insulation medium in a point-plane electrode arrangement and under AC voltage application. The entire approach implementation is described in detail, from the initial numerical field simulations of the electrode configuration to the sensing and recording devices specifications and applications. The obtained results demonstrate the dependence of the generated discharge activity on the geometrical and material properties of the dielectric and the solid/atmospheric gas interface. The current work will be further extended as part of a future extensive research programme.
ISSN:1996-1073
1996-1073
DOI:10.3390/en12152970