Transient non-uniform breakdown processes in atmospheric air

Research output: Contribution to conferencePoster


In the problem of environmental protection, global warming has become a central issue. The Kyoto protocol 1997 and EC Regulation No. 517/2014 have restricted and banned the usage of greenhouse gases with the high global warming potential. Because it has a damage of ozone layer, and a long length of time, which means it cannot be eliminated quickly. Sulphur Hexafluoride (SF6) gas has a wide range of applications in the Energy industry since its surpassing and reliable characteristics of electrical insulation (insulting medium) and arc-interruption (current-breaking medium), including high dielectric strength, self-healing, non-toxic, and compact footprint. However, lack understanding of breakdown properties in alternative gases restricts their practical application in the power and pulsed power industries. The detailed information on transient breakdown properties is required for potentials use of different gases in power and pulsed power applications. Thus, there is a requirement for both analytical and experimental investigation of these transient breakdown properties of gases with low environmental impact.
The paper presents a test configuration of a high voltage (HV) pulse system to provide a short HV pulse wide of ~250ns with fast rising time, in order to investigate the procedures regarding open air breakdown processes in the needle-plane topology. In this work, the HV pulse system which is capably of producing 250ns impulses was simulated by Pspice software and a measurement method are utilised for the electric parameters in a small gap in atmospheric air at pressure. Also, the experimental result demonstrates an increasingly dominated trend in breakdown operational characteristics for the needle-plane topology in the open air at atmospheric pressure for different electrode gaps of 100µm, 200µm, 300µm, 400µm.
Original languageEnglish
Publication statusPublished - 15 Jan 2020
Event 13th Universities High Voltage Network Colloquium - University of Strathclyde, Glasgow, United Kingdom
Duration: 15 Jan 202016 Jan 2020


Conference 13th Universities High Voltage Network Colloquium
Abbreviated titleUHVnet 2020
Country/TerritoryUnited Kingdom


  • atmospheric pressure
  • breakdown
  • environmental protection


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