Dépôt Institutionnel de l'Université Ferhat ABBAS - Sétif 1 >
Faculté de Technologie >
Département d'Electrotechnique >
Thèses de doctorat >

Veuillez utiliser cette adresse pour citer ce document : http://dspace.univ-setif.dz:8888/jspui/handle/123456789/3906

Titre: Contribution to the study and analysis of the metal ‎oxide surge arresters failure
Auteur(s): Alti, Nadjim
Mots-clés: Polymeric surge arrester
Date de publication: 16-fév-2022
Résumé: The first part of this thesis is aimed to improve the distribution of the potential and the electric field along a 220 kV ‎polymeric surge arrester by optimizing the design of the grading ring. A combined method based on 3D-FEM and ‎Taguchi design is opted in order to obtain the objective function. The optimal design of grading ring is achieved by ‎minimizing the electric field along the active column of varistors using a reduced number of simulations based on the ‎Taguchi design and a bat algorithm. By the use of an optimal design of the single ring, the electric field is reduced by ‎‎42% in the top of the 220 kV metal oxide surge arrester. Then, it was proposed to install an additional ring at the top of ‎the metal oxide surge arrester in order to obtain a better distribution of the potential and the electric field along the ‎active column. This proposed additional ring has a large geometric dimension compared to the first ring. Simulation ‎results show that using an optimal design of double rings, the potential distribution can be made as uniform as possible ‎and the electric field is reduced by 53% to avoid damage of varistors. ‎ The second part of the thesis concerns the electro-thermal modeling of metal oxide surge arresters which allows the ‎temperature variation of the studied ZnO surge arrester. For this purpose, an electro-thermal model formed of heat ‎source, capacitances, and resistances was derived. The equivalent circuit of this model has been implemented in the ‎ATP / EMTP software in order to simulate the internal temperatures of the varistors and the external temperatures of ‎the surge arrester housing, and satisfactory results have been obtained. The suitable evaluation of the temperature ‎would allow us to monitor the condition of the surge arrester as well as to avoid its failure.‎
URI/URL: http://dspace.univ-setif.dz:8888/jspui/handle/123456789/3906
Collection(s) :Thèses de doctorat

Fichier(s) constituant ce document :

Fichier Description TailleFormat
E-th1989 Alti.pdf3 MBAdobe PDFVoir/Ouvrir
View Statistics

Tous les documents dans DSpace sont protégés par copyright, avec tous droits réservés.


Valid XHTML 1.0! Ce site utilise l'application DSpace, Version 1.4.1 - Commentaires