Investigation on thermally aged natural ester oil for real‐time monitoring and analysis of transformer insulation
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| Title: | Investigation on thermally aged natural ester oil for real‐time monitoring and analysis of transformer insulation |
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| Authors: | Swayam Prakash, Ribhu Gautam, Ravikrishnan Vinu, Ashok Kumar Mishra, A. J. Amalanathan, Ramanujam Sarathi |
| Source: | High Voltage (2019) |
| Publisher Information: | Institution of Engineering and Technology (IET), 2020. |
| Publication Year: | 2020 |
| Subject Terms: | normal distribution, carboxylic acids, QC501-721, ketones, harmonic voltages, partial discharge measurement, power transformer insulation, interfacial tension, uv absorption spectroscopy, 7. Clean energy, 01 natural sciences, transformer insulation, aging duration, Electricity, standard lightning impulse voltage, surface tension, temperature 160.0 degc, 0103 physical sciences, dc voltages, liquid insulation, weibull distribution, gas chromatography-mass spectrometric analysis, transformer oil, breakdown voltage variation, aging time, steady-state fluorescence, emission profile, ultraviolet spectra, viscosity dependence, real-time monitoring, mass spectra, turbidity, thermally aged natural ester oil, scale parameter, ultraviolet analysis, TK1-9971, harmonic distortion, ageing, high frequency ac voltages, absorbance parameter, viscosity, chromatography, thermal aging temperature, fluorescence, Electrical engineering. Electronics. Nuclear engineering, partial discharge inception voltage measurements, organic compounds |
| Description: | Thermal aging of natural ester oil shows drastic reduction in partial discharge inception voltage (PDIV) and a significant variation is observed only above a certain aging time, under AC, DC, high frequency AC voltages and with harmonic voltages with different total harmonic distortion. Weibull distribution studies on PDIV measurements indicate a reduction in scale parameter (α) with increase in thermal aging temperature. A characteristic reduction in breakdown voltage was observed with the thermally aged ester oil, under AC, DC and standard lightning impulse voltage. The breakdown voltage variation with aged ester oil follows normal distribution. Ultraviolet (UV) analysis of ester oil thermally aged at 160°C has revealed a regular shift of the derived absorbance parameter to longer wavelengths. The interfacial tension and turbidity exhibits an inverse relationship with the thermally aged ester oil. Gas chromatography/mass spectrometric analysis of the thermally aged ester oil predicted the formation of more carboxylic acids and ketones with aging duration. The steady‐state fluorescence on thermally aged ester oil exhibits a shift in its emission profile, which is in tandem with the UV absorption spectroscopic analysis. Fluorescence analysis can be adopted as a real‐time monitoring tool in transformers, to understand the condition of liquid insulation. The viscosity dependence on the wavelength of derivative absorption maxima follows a direct relationship with the thermally aged natural ester oil. |
| Document Type: | Article Other literature type |
| Language: | English |
| ISSN: | 2397-7264 |
| DOI: | 10.1049/hve.2019.0178 |
| Access URL: | https://doaj.org/article/f7eb5334e94d4316a0b2db096bf5cef0 https://ietresearch.onlinelibrary.wiley.com/doi/10.1049/hve.2019.0178 https://digital-library.theiet.org/content/journals/10.1049/hve.2019.0178 https://ieeexplore.ieee.org/document/9095484 |
| Rights: | CC BY |
| Accession Number: | edsair.doi.dedup.....2f785297aabed45da3ef2e7eeaaa38c7 |
| Database: | OpenAIRE |
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Nájsť tento článok vo Web of Science | Abstract: | Thermal aging of natural ester oil shows drastic reduction in partial discharge inception voltage (PDIV) and a significant variation is observed only above a certain aging time, under AC, DC, high frequency AC voltages and with harmonic voltages with different total harmonic distortion. Weibull distribution studies on PDIV measurements indicate a reduction in scale parameter (α) with increase in thermal aging temperature. A characteristic reduction in breakdown voltage was observed with the thermally aged ester oil, under AC, DC and standard lightning impulse voltage. The breakdown voltage variation with aged ester oil follows normal distribution. Ultraviolet (UV) analysis of ester oil thermally aged at 160°C has revealed a regular shift of the derived absorbance parameter to longer wavelengths. The interfacial tension and turbidity exhibits an inverse relationship with the thermally aged ester oil. Gas chromatography/mass spectrometric analysis of the thermally aged ester oil predicted the formation of more carboxylic acids and ketones with aging duration. The steady‐state fluorescence on thermally aged ester oil exhibits a shift in its emission profile, which is in tandem with the UV absorption spectroscopic analysis. Fluorescence analysis can be adopted as a real‐time monitoring tool in transformers, to understand the condition of liquid insulation. The viscosity dependence on the wavelength of derivative absorption maxima follows a direct relationship with the thermally aged natural ester oil. |
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| ISSN: | 23977264 |
| DOI: | 10.1049/hve.2019.0178 |