High Frequency Model of Power Transformer Bushing for Very Fast Transient Studies - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue IEEE Access Année : 2023

High Frequency Model of Power Transformer Bushing for Very Fast Transient Studies

Résumé

Fast and very fast transient overvoltages generally appear during switching operations within electrical substations. The oscillatory nature of such phenomena with frequencies that can reach several tens of megahertz tends to degrade the lifetime of high voltage equipment such as bushings and transformers, inducing partial discharges activity or breakdown of the insulation system. According to several case studies, bushings are one of the most sensitive parts to such overvoltages, indeed, a failure in a bushing will in most cases lead to a failure of the transformer, often catastrophically. Generating such overvoltages with a very high frequency character and considerable amplitude can be very difficult, moreover, studying the effect of such overvoltages on the insulated bushings is not easy, even experimentally. Therefore, a simulation of the fast transients in the system can be very useful to understand the consequences of such phenomena. In this context, this document aims to propose a model of high voltage capacitive graded oil impregnated paper (OIP) bushing based on a distributed electrical circuit. The equivalent circuit is constructed based on the geometric design and electrical properties of the materials. The model was developed and implemented using Matlab/Simulink® software, and was validated with experimental measurements based on impedance sweep frequency analysis. The modeling results are in a good agreement with the experimental ones.
Fichier principal
Vignette du fichier
High_Frequency_Model_of_Power_Transformer_Bushing_for_Very_Fast_Transient_Studies.pdf (1.49 Mo) Télécharger le fichier
Origine Publication financée par une institution
Licence

Dates et versions

hal-04237939 , version 1 (06-06-2024)

Licence

Identifiants

Citer

Anes Messadi, Ayyoub Zouaghi, Esseddik Ferdjallah-Kherkhachi, Christian Vollaire, Olivier Richer, et al.. High Frequency Model of Power Transformer Bushing for Very Fast Transient Studies. IEEE Access, 2023, 11, pp.93908-93919. ⟨10.1109/ACCESS.2023.3309702⟩. ⟨hal-04237939⟩
45 Consultations
14 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More