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Phenomenological approach to simulation of propagation of spots over cathodes of high-power vacuum circuit breakers

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dc.contributor.authorCunha, M. D.
dc.contributor.authorWenzel, N.
dc.contributor.authorBenilov, M. S.
dc.contributor.authorHartmann, W.
dc.date.accessioned2022-09-05T09:24:26Z
dc.date.available2022-09-05T09:24:26Z
dc.date.issued2016
dc.description.abstractA phenomenological description of an ensemble of a large number of spots on negative contacts of high-power vacuum circuit breakers is developed by means of generalization of the concept of random walk of a single cathode spot in low-current vacuum arcs. The model is formulated in terms of a convection-diffusion equation governing the evolution of the number of spots per unit area, taking into account the variation of the number of spots with the arc current and the “retrograde repulsion” between spots. The approach is applied to description of the distribution of cathode spots during the initial expansion process after arc ignition in conditions of two independent experiments simulating high-power switches. A reasonably good agreement between the theory and the experiment is found. The developed model can be used as a module of global numerical models of the interruption process in high-power vacuum circuit breakers.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCunha, M. D., Wenzel, N., Benilov, M. S., & Hartmann, W. (2016, September). Phenomenological approach to simulation of propagation of spots over cathodes of high-power vacuum circuit breakers. In 2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) (Vol. 1, pp. 1-4). IEEE. DOI: 10.1109/DEIV.2016.7748728pt_PT
dc.identifier.doi10.1109/DEIV.2016.7748728pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/4559
dc.language.isoengpt_PT
dc.publisherIEEEpt_PT
dc.relationInstitute for Plasmas and Nuclear Fusion
dc.relation.publisherversionhttps://ieeexplore.ieee.org/abstract/document/7748728pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectCathodes of high-powerpt_PT
dc.subjectVacuum circuit breakerspt_PT
dc.subjectSimulation of propagation of spotspt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titlePhenomenological approach to simulation of propagation of spots over cathodes of high-power vacuum circuit breakerspt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleInstitute for Plasmas and Nuclear Fusion
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FFIS%2F50010%2F2013/PT
oaire.citation.endPage4pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.title2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameCunha
person.familyNameBenilov
person.givenNameMário
person.givenNameMikhail
person.identifier.ciencia-id0F14-A79A-97C1
person.identifier.orcid0000-0002-0397-536X
person.identifier.orcid0000-0001-9059-1948
person.identifier.ridK-4443-2015
person.identifier.scopus-author-id7102711276
person.identifier.scopus-author-id7005138676
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication8509472b-5d78-47db-bfa0-51625a4e9218
relation.isAuthorOfPublication5ccf95a3-53d5-446c-857c-55d64b887175
relation.isAuthorOfPublication.latestForDiscovery8509472b-5d78-47db-bfa0-51625a4e9218
relation.isProjectOfPublication773f8550-0778-4bd3-b859-600f4fca9629
relation.isProjectOfPublication.latestForDiscovery773f8550-0778-4bd3-b859-600f4fca9629

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