Contribution to the measurement of HVDC partial discharges inception voltage of natural gases

Slama, Mohammed E., Michelarakis, Michail ORCID: https://orcid.org/0000-0003-2862-4539, Haddad, Manu ORCID: https://orcid.org/0000-0003-4153-6146, Hills, Meirion ORCID: https://orcid.org/0000-0003-3893-8486 and Stone, Chistopher 2025. Contribution to the measurement of HVDC partial discharges inception voltage of natural gases. Presented at: UPEC 2024, Cardiff, Wales, 02-06 September 2024. Proceedings 59th International Universities Power Engineering Conference (UPEC). IEEE, 10.1109/upec61344.2024.10892503

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Abstract

In this paper, a comparative study of DC Partial Discharge Inception Voltage (PDIV) performances are presented. The goal is to determine the role of breakdown ageing on the DC PDIV. Two natural gases were used: CO2 and Dry (Synthetic) Air in a range of pressure 1 - 6 bar. A reduced-scale GIL vessel is used with a grounded pin. The PDIVs are measured before breakdown ageing and after breakdown ageing. The results showed that PDIVs levels of aged gases are lower than PDIV of non-aged gases. GCMS analysis showed that aged gases contain some traces of decomposition products provoked by arcing and interaction with the solid insulation material (PTFE). On the other hand, traces of arcing impact at the inner electrode are observed and affect the PDIVs levels.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	In Press
Schools:	Schools > Engineering
Publisher:	IEEE
ISBN:	979-8-3503-7973-0
Last Modified:	10 Mar 2025 16:38
URI:	https://orca.cardiff.ac.uk/id/eprint/176778

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