Thermal Aging Effects on the Electrical Breakdown Voltage of TiO2 and MWCNT Nanofluids Based on POME

Sharifah Masniah, Wan Masra and Yanuar Zulardiansyah, Arief and Siti Kudnie, Sahari and Andrew Ragai, Henry Rigit and Md. Rezaur, Rahman and Nur Sabrina, Suhaimi (2023) Thermal Aging Effects on the Electrical Breakdown Voltage of TiO2 and MWCNT Nanofluids Based on POME. IEEE Transactions on Dielectrics and Electrical Insulation, 2023 (1). pp. 1-11. ISSN 1558-4135

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Abstract

In this work, the aging behavior of liquid insulation in transformers using chemically modified refined, bleached, and deodorized palm oil (RBDPO) olein is investigated. The transesterification process is used to modify RBDPO olein to produce palm oil methyl ester (POME), which is used as a base fluid for nanofluid (NF) preparation. The performance of POME with the dispersion of semiconducting titanium oxide (TiO2) and conducting multi-walled carbon nanotube (MWCNT) nanoparticles (NPs) at different concentrations on the AC breakdown voltage (AC BDV) as insulation in transformers is evaluated for their aging behavior. The accelerated aging was conducted under sealed conditions at a temperature of 130°C for 1000 hours. The results show that incorporating TiO 2 and MWCNT NPs into POME did not have an adverse effect on the BDV, regardless of the doping concentrations. Notably, POME-based TiO2 NFs exhibited the highest AC BDV after thermal aging, specifically at a concentration of 0.05 g/L. Anderson-Darling goodness-of-fit statistics were performed on the experimental data to verify their agreement with the Normal and Weibull distributions.

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