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Electrical detection of creeping discharges over insulator surfaces in atmospheric gases under AC voltage application

Michelarakis, Michail, Lugg-Widger, Phillip, Beroual, Abderrahmane and Haddad, Abderrahmane (Manu) 2019. Electrical detection of creeping discharges over insulator surfaces in atmospheric gases under AC voltage application. Energies 12 (15) , 2970. 10.3390/en12152970

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Abstract

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

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: MDPI
ISSN: 1996-1073
Date of First Compliant Deposit: 12 August 2019
Date of Acceptance: 30 July 2019
Last Modified: 13 Aug 2019 10:00
URI: http://orca.cf.ac.uk/id/eprint/124870

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