Analysis of Partial Discharges in Oil-Impregnated Transformer Paper Insulation and PET-G Insulation
Partial discharge (PD) is a widespread phenomenon instigated in power transformer (PT) insulation systems. PDs are triggered by voids that vary in size and position within the PT insulation. The electrical characteristics of those damaging, PD-causing cavities must be well understood, to accelerate...
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2025-01-01
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| Series: | IEEE Open Journal of Instrumentation and Measurement |
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| Online Access: | https://ieeexplore.ieee.org/document/10943204/ |
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| author | Sayed Mohammad Kameli Abdelaziz Abuelrub Mohammad AlShaikh Saleh Shady S. Refaat Ali Ghrayeb Haitham Abu-Rub Marek Olesz |
| author_facet | Sayed Mohammad Kameli Abdelaziz Abuelrub Mohammad AlShaikh Saleh Shady S. Refaat Ali Ghrayeb Haitham Abu-Rub Marek Olesz |
| author_sort | Sayed Mohammad Kameli |
| collection | DOAJ |
| description | Partial discharge (PD) is a widespread phenomenon instigated in power transformer (PT) insulation systems. PDs are triggered by voids that vary in size and position within the PT insulation. The electrical characteristics of those damaging, PD-causing cavities must be well understood, to accelerate the development of advanced PD detection techniques. Thus, the impact of varying the radius and position of spherical air voids on the characteristics of PDs in PTs is examined using a 3-D finite element analysis (FEA) model designed in COMSOL Multiphysics. The spherical voids are positioned between two windings of a 512 kV, three-phase (3<inline-formula> <tex-math notation="LaTeX">$\varphi $ </tex-math></inline-formula>) PT. The peak electric field (EF) and aggregate energy in the FEA model are used in conjunction with laboratory measurements of the apparent discharge magnitude, for detailed analysis of Polyethylene Terephthalate Glycol (PET-G)-based cylindrical voids with different heights. Simulations demonstrate that the inception of PD activity in the PT model occurs for spherical voids with a radius exceeding 1 mm. Furthermore, the most severe PDs occur within the press-board insulation, adjacent to the uppermost part of the innermost windings. Experiments demonstrate that a significant increase in PD activity was observed for PET-G-based cylindrical voids with heights exceeding 1 mm. |
| format | Article |
| id | doaj-art-36ee5aebc8de45639d501c1be98a56ba |
| institution | OA Journals |
| issn | 2768-7236 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Instrumentation and Measurement |
| spelling | doaj-art-36ee5aebc8de45639d501c1be98a56ba2025-08-20T02:14:42ZengIEEEIEEE Open Journal of Instrumentation and Measurement2768-72362025-01-01411210.1109/OJIM.2025.355532310943204Analysis of Partial Discharges in Oil-Impregnated Transformer Paper Insulation and PET-G InsulationSayed Mohammad Kameli0https://orcid.org/0000-0002-5833-288XAbdelaziz Abuelrub1https://orcid.org/0000-0001-5419-9527Mohammad AlShaikh Saleh2https://orcid.org/0000-0002-0971-075XShady S. Refaat3https://orcid.org/0000-0001-9392-6141Ali Ghrayeb4https://orcid.org/0000-0002-6808-5886Haitham Abu-Rub5https://orcid.org/0000-0001-8687-3942Marek Olesz6https://orcid.org/0000-0003-4022-6082Electrical and Computer Engineering Department, Texas A&M University at Qatar, Doha, QatarElectrical and Computer Engineering Department, Texas A&M University at Qatar, Doha, QatarDepartment of Electrical and Computer Engineering, Texas A&M University, College Station, TX, USADepartment of Engineering, School of Physics, Engineering, and Computer Science, University of Hertfordshire, Hatfield, U.K.Electrical and Computer Engineering Program in College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, QatarElectrical and Computer Engineering Program in College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, QatarDepartment of Electrical Power Engineering, Gdańsk University of Technology, Gdańsk, PolandPartial discharge (PD) is a widespread phenomenon instigated in power transformer (PT) insulation systems. PDs are triggered by voids that vary in size and position within the PT insulation. The electrical characteristics of those damaging, PD-causing cavities must be well understood, to accelerate the development of advanced PD detection techniques. Thus, the impact of varying the radius and position of spherical air voids on the characteristics of PDs in PTs is examined using a 3-D finite element analysis (FEA) model designed in COMSOL Multiphysics. The spherical voids are positioned between two windings of a 512 kV, three-phase (3<inline-formula> <tex-math notation="LaTeX">$\varphi $ </tex-math></inline-formula>) PT. The peak electric field (EF) and aggregate energy in the FEA model are used in conjunction with laboratory measurements of the apparent discharge magnitude, for detailed analysis of Polyethylene Terephthalate Glycol (PET-G)-based cylindrical voids with different heights. Simulations demonstrate that the inception of PD activity in the PT model occurs for spherical voids with a radius exceeding 1 mm. Furthermore, the most severe PDs occur within the press-board insulation, adjacent to the uppermost part of the innermost windings. Experiments demonstrate that a significant increase in PD activity was observed for PET-G-based cylindrical voids with heights exceeding 1 mm.https://ieeexplore.ieee.org/document/10943204/Dielectric breakdownhigh-voltage techniquesinsulationpartial dischargespower transformer |
| spellingShingle | Sayed Mohammad Kameli Abdelaziz Abuelrub Mohammad AlShaikh Saleh Shady S. Refaat Ali Ghrayeb Haitham Abu-Rub Marek Olesz Analysis of Partial Discharges in Oil-Impregnated Transformer Paper Insulation and PET-G Insulation IEEE Open Journal of Instrumentation and Measurement Dielectric breakdown high-voltage techniques insulation partial discharges power transformer |
| title | Analysis of Partial Discharges in Oil-Impregnated Transformer Paper Insulation and PET-G Insulation |
| title_full | Analysis of Partial Discharges in Oil-Impregnated Transformer Paper Insulation and PET-G Insulation |
| title_fullStr | Analysis of Partial Discharges in Oil-Impregnated Transformer Paper Insulation and PET-G Insulation |
| title_full_unstemmed | Analysis of Partial Discharges in Oil-Impregnated Transformer Paper Insulation and PET-G Insulation |
| title_short | Analysis of Partial Discharges in Oil-Impregnated Transformer Paper Insulation and PET-G Insulation |
| title_sort | analysis of partial discharges in oil impregnated transformer paper insulation and pet g insulation |
| topic | Dielectric breakdown high-voltage techniques insulation partial discharges power transformer |
| url | https://ieeexplore.ieee.org/document/10943204/ |
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