Propagation Characteristics of Partial Discharges in an Oil-Filled Power Transformer

Sayed Mohammad Kameli, Shady S. Refaat, Ali Ghrayeb, Haitham Abu-Rub, Jaroslaw Guzinski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Power transformers are among the most important assets in the power transmission and distribution grid. However, they suffer from degradation and possible faults causing major electrical and financial losses. Partial discharges (PDs) are used to identify the insulation health status and their degradation level. PDs are incipient, low-magnitude faults caused by localized dielectric breakdown. Those activities emit signals in many forms, including electrical, chemical, acoustic, electromagnetic, and optical, facilitating various detection methods. This paper provides a theoretical basis for the condition evaluation of an oil-filled power transformer and clarifies the relationship between the operating voltage, void location, and electric-field intensity within the void. This was achieved by investigating the propagation characteristics of partial discharge signals in an oil-filled power transformer using a 3D finite element method (FEM) based simulation. Moreover, the characterization of simulated PD sources at different positions is investigated in this paper. The simulation results are curried out to show that air voids near the windings are subject to greatest peak electric field intensity.

Original languageEnglish
Title of host publicationCPE-POWERENG 2023 - 17th IEEE International Conference on Compatibility, Power Electronics and Power Engineering
Place of PublicationTallinn, Estonia
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1-6
Number of pages6
Volume1
ISBN (Electronic)9798350300048
ISBN (Print)979-8-3503-0005-5
DOIs
Publication statusPublished - 29 Aug 2023
Event17th IEEE International Conference on Compatibility, Power Electronics and Power Engineering, CPE-POWERENG 2023 - NORDIC HOTEL FORUM, Tallinn, Estonia
Duration: 14 Jun 202316 Jun 2023
Conference number: 17
https://taltech.ee/en/cpe-powereng2023

Conference

Conference17th IEEE International Conference on Compatibility, Power Electronics and Power Engineering, CPE-POWERENG 2023
Abbreviated titleIEEE CPE-POWERENG 2023
Country/TerritoryEstonia
CityTallinn
Period14/06/2316/06/23
Internet address

Keywords

  • Finite element analysis
  • partial discharge
  • power transformer
  • transformer aging

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