Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer
This work examines the impact of multi pre-exponential factors on the lifetime modelling of the paper in oil-immersed transformers. First, the corresponding pre-exponential factor was determined based on the concentrations of the three parameters known as oxygen, moisture and acid. Next, the pre-exp...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Universiti Putra Malaysia Press
2022
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| Online Access: | http://psasir.upm.edu.my/id/eprint/92589/ http://psasir.upm.edu.my/id/eprint/92589/1/15%20JST-3250-2021.pdf |
| _version_ | 1848861671473283072 |
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| author | Saleh, Najiyah Azis, Norhafiz Jasni, Jasronita Ab Kadir, Mohd Zainal Abidin Talib, Mohd Aizam |
| author_facet | Saleh, Najiyah Azis, Norhafiz Jasni, Jasronita Ab Kadir, Mohd Zainal Abidin Talib, Mohd Aizam |
| author_sort | Saleh, Najiyah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This work examines the impact of multi pre-exponential factors on the lifetime modelling of the paper in oil-immersed transformers. First, the corresponding pre-exponential factor was determined based on the concentrations of the three parameters known as oxygen, moisture and acid. Next, the pre-exponential factor for each of the parameters at different concentrations was combined based on the summative approach to obtain the overall impact on the lifetime of the paper. It is found that the expected life of the paper for overall multi pre-exponential factors is higher than either single or double pre-exponential factors. For a single pre-exponential factor, the expected life of the paper decreases by a factor of
59.8 as the oxygen concentration increases from 15,000 ppm to 210,000 ppm. Moisture can decrease the expected life of the paper by a factor of 34 as it increases from 0.5% to 5%. Low molecular weight acid (LMA) has a higher impact than high molecular weight
acid (HMA), whereby its impact is further enhanced through multi pre-exponential factor effect whereby the expected life of the paper decreases by a factor of 7.9 as the moisture content increases from 0.5% to 5% and oxygen increases from 300 ppm to 20,000 ppm. |
| first_indexed | 2025-11-15T13:04:50Z |
| format | Article |
| id | upm-92589 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T13:04:50Z |
| publishDate | 2022 |
| publisher | Universiti Putra Malaysia Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-925892022-05-27T09:20:50Z http://psasir.upm.edu.my/id/eprint/92589/ Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer Saleh, Najiyah Azis, Norhafiz Jasni, Jasronita Ab Kadir, Mohd Zainal Abidin Talib, Mohd Aizam This work examines the impact of multi pre-exponential factors on the lifetime modelling of the paper in oil-immersed transformers. First, the corresponding pre-exponential factor was determined based on the concentrations of the three parameters known as oxygen, moisture and acid. Next, the pre-exponential factor for each of the parameters at different concentrations was combined based on the summative approach to obtain the overall impact on the lifetime of the paper. It is found that the expected life of the paper for overall multi pre-exponential factors is higher than either single or double pre-exponential factors. For a single pre-exponential factor, the expected life of the paper decreases by a factor of 59.8 as the oxygen concentration increases from 15,000 ppm to 210,000 ppm. Moisture can decrease the expected life of the paper by a factor of 34 as it increases from 0.5% to 5%. Low molecular weight acid (LMA) has a higher impact than high molecular weight acid (HMA), whereby its impact is further enhanced through multi pre-exponential factor effect whereby the expected life of the paper decreases by a factor of 7.9 as the moisture content increases from 0.5% to 5% and oxygen increases from 300 ppm to 20,000 ppm. Universiti Putra Malaysia Press 2022 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/92589/1/15%20JST-3250-2021.pdf Saleh, Najiyah and Azis, Norhafiz and Jasni, Jasronita and Ab Kadir, Mohd Zainal Abidin and Talib, Mohd Aizam (2022) Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer. Pertanika Journal of Science and Technology, 30 (2). pp. 1115-1133. ISSN 0128-7680; ESSN: 2231-8526 http://www.pertanika.upm.edu.my/pjst/browse/prepress-issue?article=JST-3250-2021 10.47836/pjst.30.2.15 |
| spellingShingle | Saleh, Najiyah Azis, Norhafiz Jasni, Jasronita Ab Kadir, Mohd Zainal Abidin Talib, Mohd Aizam Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer |
| title | Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer |
| title_full | Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer |
| title_fullStr | Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer |
| title_full_unstemmed | Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer |
| title_short | Paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer |
| title_sort | paper lifetime mathematical modelling based on multi pre-exponential factors for oil-immersed transformer |
| url | http://psasir.upm.edu.my/id/eprint/92589/ http://psasir.upm.edu.my/id/eprint/92589/ http://psasir.upm.edu.my/id/eprint/92589/ http://psasir.upm.edu.my/id/eprint/92589/1/15%20JST-3250-2021.pdf |