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Investigation on thermally aged natural ester oil for real-time monitoring and analysis of transformer insulation

High Voltage 2020年第2期5卷 209-217页

作者： Arputhasamy Joseph Amalanathan Ramanujam Sarathi Swayam Prakash Ashok Kumar Mishra Ribhu Gautam ravikrishnan vinu Department of Electrical Engineering Indian Institute of Technology MadrasChennai 600036India Department of Chemistry Indian Institute of Technology MadrasChennai 600036India Department of Chemical Engineering Indian Institute of Technology MadrasChennai 600036India

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 *** 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 *** breakdown voltage variation with aged ester oil follows normal ***(UV)analysis of ester oil thermally aged at 160°C has revealed a regular shift of the derived absorbance parameter to longer *** interfacial tension and turbidity exhibits an inverse relationship with the thermally aged ester *** chromatography/mass spectrometric analysis of the thermally aged ester oil predicted the formation of more carboxylic acids and ketones with aging *** 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 can be adopted as a real-time monitoring tool in transformers,to understand the condition of liquid *** viscosity dependence on the wavelength of derivative absorption maxima follows a direct relationship with the thermally aged natural ester oil.

关键词： temperature thermally insulation

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