Othman, Nur Amirah and Zainuddin, Hidayat and Yahaya, Muhammad Sharil and Azis, N. and Ibrahim, Zulkifli and Musni, M.A.C. (2023) UV-vis spectra and moisture content of retrofilled aged mineral oil with synthetic ester. In: 3rd IEEE International Conference in Power Engineering Applications, ICPEA 2023, 6 March 2023through 7 March 2023, Virtual, Online.
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UV-vis spectra and moisture content of retrofilled aged mineral oil with synthetic ester.pdf Restricted to Repository staff only Download (1MB) |
Abstract
Retrofilling aged mineral oil (AMO) with ester oils is now being explored as an alternative option for the extension of transformer life. In transformer retrofilling, there is up to 10 % of aged mineral oil will be mixed with new oil. It is anticipated that the dielectric properties of the ester oil will be affected when the oils are mixed together. In this paper, synthetic ester (SE) oil was investigated in terms of its physicochemical properties after being mixed with various proportions of aged mineral oil. An accelerated thermal aging of mineral oil has been firstly prepared prior to the retrofilling with SE oil. The mineral oil was aged in a vacuum oven at 130 °C for 150 hours. There are three different proportions, i.e. 3 %, 5 % and 7 % were selected for use in the retrofilling process. Further, the retrofilled aged mineral-synthetic ester (AMO/SE) oil was tested for the moisture content and evaluation of degradation products through Ultraviolet-Visible Spectroscopy (UV-Vis) spectra. Based on the findings, it was interestingly found that the higher proportion of AMO has reduced the moisture content of retrofilled AMO/SE. In terms of UV-Vis spectra, the higher proportion of AMO has increased the absorbance with longer wavelength and it is in line with the concentration of dissolved decay products (DDPs). Overall, the moisture content and the concentration of DDPs of retrofilled AMO/SE has still meet the requirement as a new oil.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | Mineral oil, Moisture content, Power transformer, Retrofilling, Synthetic ester, UV-Vis spectra |
| Divisions: | Faculty Of Electrical Technology And Engineering |
| Depositing User: | Maizatul Najwa Ahmad |
| Date Deposited: | 20 Sep 2024 16:00 |
| Last Modified: | 20 Sep 2024 16:00 |
| URI: | http://eprints.utem.edu.my/id/eprint/27885 |
| Statistic Details: | View Download Statistic |
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