| Titre : | Contribution to the study and analysis of the metal oxide surge arresters failure |
| Auteurs : | Nadjim Alti, Auteur ; Abdelhafid Bayadi, Directeur de thèse |
| Type de document : | texte imprimé |
| Editeur : | Sétif : Université Ferhat Abbas faculté de Technologie département d'électrotechnique, 2021 |
| ISBN/ISSN/EAN : | TS4/9106 |
| Format : | 1 vol. (104 f.) / ill. / 30 cm |
| Note générale : | Références |
| Langues: | Français |
| Catégories : | |
| Mots-clés: | Polymeric surge arrester |
| 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. |
Exemplaires (1)
| Cote | Support | Localisation | Disponibilité |
|---|---|---|---|
| TS4/9106 | Thèse | Bibliothèque centrale | Disponible |
Accueil
