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Corona charge produced by thundercloud fields in grounded rods
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2012 (English)In: 31st International Conference on Lightning Protection ICLP 2012, 2012, 6344365- p.Conference paper (Refereed)
Abstract [en]

Electrostatic fields below the thundercloud lead to the formation of glow charge from grounded objects. The charge accumulated after certain time can initiate or inhibit the called streamer formation and consequently the inception and development of upward leaders. By means of a two dimensional numerical model that takes into account the particles behavior is observed that glow charge can smooth the electric field on top of the grounded rod and consequently hinder the inception of streamers and upward leaders from the grounded rod. It is concluded that to be able to initiate unstable upward leaders from the shielded grounded rod a sudden change of electric field is necessary. A two dimensional numerical model that solves the continuity equations for positive and negative ions and electrons coupled with Poisson equation was implemented. Comparison for different magnitudes of electric field and characteristics of rod are included as well.

Place, publisher, year, edition, pages
2012. 6344365- p.
Keyword [en]
electric field, glow charge, inception, streamer, Continuity equations, Corona charge, Grounded objects, Streamer formation, Sudden change, Two dimensional numerical models, Electric fields, Lightning protection, Numerical models, Poisson equation, Two dimensional, Electric grounding
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Science of Electricity
URN: urn:nbn:se:uu:diva-193899DOI: 10.1109/ICLP.2012.6344365ISBN: 9781467318976OAI: oai:DiVA.org:uu-193899DiVA: diva2:604839
2012 31st International Conference on Lightning Protection, ICLP 2012, 2 September 2012 through 7 September 2012, Vienna
Available from: 2013-02-12 Created: 2013-02-06 Last updated: 2016-03-03Bibliographically approved

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Arevalo, L.Cooray, Vernon
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