Calculation of electrical field of spherical and cylindrical gas voids in dielectrics by taking surface conductivity into consideration

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dc.authoridHafiz, Alisoy/0000-0003-4374-9559
dc.authoridKoseoglu, Murat/0000-0003-3774-1083
dc.authorwosidHafiz, Alisoy/ABA-7256-2020
dc.authorwosidKoseoglu, Murat/ABG-8975-2020
dc.contributor.authorAlisoy, GT
dc.contributor.authorAlisoy, HZ
dc.contributor.authorKoseoglu, M
dc.date.accessioned2024-08-04T20:15:02Z
dc.date.available2024-08-04T20:15:02Z
dc.date.issued2005
dc.departmentİnönü Üniversitesien_US
dc.description.abstractPurpose - To determine the electrical field E-1(t) in spherical and cylindrical gas voids existing in an insulator by considering surface conductivity of gas voids having an electrical permittivity of epsilon(1) and conductivity of gamma(1) for DC and AC situations. Design/methodology/approach - Analytical expressions satisfying Laplace equation for inside and outside of the cylindrical and spherical gas voids in an insulator located in an external electrical field having a definite time dependent character, have been derived by considering the surface conductivity of the gas void. The coefficients included by these analytical expressions have been determined by utilizing the continuity equation of the current on the surface of the voids. Findings - It has been demonstrated that the electrical field remains uniform in spherical and cylindrical gas voids when the surface conductivity of gas void has been considered. It has been determined that the contact charging process of different shaped particles has an exponential characteristic, and some expressions have been derived to determine the time constants of this process for practical purposes. Practical implications - The results have been applied to the problems about contact charging of semi-spherical and semi-cylindrical insulated particles located at a charged surface and problems about the calculation of onset discharging voltage of ionization process in dielectric including gas voids. Originality/value - For spherical and cylindrical gas voids, the onset discharging voltage corresponding to the ionization process occurring in gas voids has increased by increasing the surface conductivity of the void. For the limit value of the surface conductivity, the voids in the insulator behaves like metal particles distributed into the insulator, for this reason, at the outside of the void, especially in the regions where the voids are close to the electrodes and each other, the electrical field will be non-uniform and will increase. This situation will cause the ignition of the partial discharge and destroy to the insulator.en_US
dc.identifier.doi10.1108/03321640510615517
dc.identifier.endpage1163en_US
dc.identifier.issn0332-1649
dc.identifier.issue4en_US
dc.identifier.scopus2-s2.0-25444494426en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage1152en_US
dc.identifier.urihttps://doi.org/10.1108/03321640510615517
dc.identifier.urihttps://hdl.handle.net/11616/94113
dc.identifier.volume24en_US
dc.identifier.wosWOS:000232642900005en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherEmerald Group Publishing Ltden_US
dc.relation.ispartofCompel-The International Journal For Computation and Mathematics in Electrical and Electronic Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectelectric fieldsen_US
dc.subjectelectrical conductivityen_US
dc.subjectelectrical propertiesen_US
dc.subjectgasesen_US
dc.subjectgeometric planes and solidsen_US
dc.titleCalculation of electrical field of spherical and cylindrical gas voids in dielectrics by taking surface conductivity into considerationen_US
dc.typeArticleen_US

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