Influence of Antioxidants on Physio-Chemical Properties of the Mixture of Rice Bran Oil and Rapeseed Oil for Transformers
Main Article Content
Abstract
This study evaluated the effect of antioxidants on the physical and chemical parameters of a mixture of rice oil and rape-seed oil for using as insulating transformer oil. Antioxidants such as butylated hydroxytoluene, tertiary butyl hydroquinone and propyl gallate were used. Experimental results showed that these three additives increased the oxidation stability index of the oil mixture, but tertiary butyl hydroquinone had the greatest effect and increased the oxidation stability index by 4 times. However, tertiary butyl hydroquinone insignificantly changes the physical and chemical parameters of the oil mixture except for the breakdown strength. This parameter of the oil mixture was increased by about 24% when tertiary butyl hydroquinone (0,3 wt%) was added. In addition, it was observed that tertiary butyl hydroquinone inhibited the aging process of the oil mixture at high temperatures. With the presence of tertiary butyl hydroquinone, the viscosity of the aged oil mixture only increased by 16% instead of up to 36% in case of without addition of the antioxidant under without oxygen or low concentration of oxygen.
Keywords:
Rice oil, Rape-seed Oil, Transformers, Ageing, Antioxidants
References
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[3] T. V. Oommen, Vegetable Oils for Liquid-Filled Transformers, IEEE Electr. Insul. Mag., Vol. 18, 2002, pp. 6-11.
https://doi.org/10.1109/57.981322
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[6] B. S. H. M. S. Y. Matharage, M. A. R. M. Fernando, E. Tuncer, M. A. A. P. Bandara, C. S. Kalpage, Coconut Oil as Transformer Liquid Insulation-Ageing and Simulated Thermal and Electrical Faults, Proceedings of the Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Montreal, Canada, 2012. https://doi.org/10.1109/CEIDP.2012.6378911
[7] K. Varatharajana, D. S. Pushparanib, Screening of Antioxidant Additives for Biodiesel Fuels, Renewable and Sustainable Energy Reviews, Vol. 82, 2018, pp. 2017-2028.
https://doi.org/10.1016/j.rser.2017.07.020
[8] H. M. Wilhelm, L. Feitosa, L. L. Silva, A. Cabrino, L. P. Ramos, Evaluation of in-Service Oxidative and Antioxidant Additive Consumption in Corn Oil Based Natural Ester Insulating Fluid, IEEE Trans. Dielectr. Electr. Insul, Vol. 22, 2015, pp. 864-869. https://doi.org/10.1109/TDEI.2015.7076786
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https://doi.org/10.1109/TDEI.2020.008422
[11] V. Mentlik, P. Trnka, J. Hornak, P. Totzauer, Development of a Biodegradable Electro-Insulating Liquid and its Subsequent Modification by Nanoparticles, Energies, Vol. 11, 2018, pp. 508-524.
https://doi.org/10.3390/en11030508
[12] N. V. Dung, Application of Vegetable Oil-Based Insulating Fluids for Transformers: A Review, VNU Journal of Science: Natural Sciences and Technology, Vol. 35, 2019, pp. 1-15, https://doi.org/10.25073/2588-140/vnunst.4936. (in Vietnamese)
[13] N. Beltrán, E. Palacios, G. Blass, Potential of Jatropha Curcas Oil as a Dielectric Fluid for Power Transformers, IEEE Electr. Insul. Mag, Vol. 33, 2017, pp. 8-15.
https://doi.org/10.1109/MEI.2017.7866674
[14] K. Bandara, C. Ekanayake, T. Saha, H. Ma, Performance of Natural Ester as a Transformer Oil in Moisture-Rich Environments, Energies, Vol. 9, 2016, pp. 1-13.
https://doi.org/10.3390/en9040258
[15] A. Raymon, P. S. Pakianathan, M. P. E. Rajamani, R. Karthik, Enhancing the Critical Characteristics of Natural Esters with Antioxidants for Power Transformer Application, IEEE Trans. Dielectr. Electr. Insul., Vol. 20, 2013, pp. 899-912.
https://doi.org/10.1109/TDEI.2013.6518959
[16] S. S. Kumar, M. W. Iruthayarajan, M. Bakrutheen, S. G. Kannan, Effect of Antioxidants on Critical Properties of Natural Esters for Liquid Insulations, IEEE Trans. Dielectr. Electr. Insul., Vol. 23, 2016, pp. 2068-2078. https://doi.org/10.1109/TDEI.2016.7556480
[17] A. A. Zaky, I. Y. Megahed, C. Evangelou, The Effect of Organic Additives on the Breakdown and Gassing Properties of Mineral Oils, J. Phys. D Appl. Phys., Vol. 9, 1976, pp. 841-849. https://doi.org/10.1088/0022-3727/9/5/017
[18] M. Unge, S. Singha, N. V. Dung, D. Linhjell, S. Ingebrigtsen, L. E. Lundgaard, Enhancements in the Lightning Impulse Breakdown Characteristics of Natural Ester Dielectric Liquids, Applied Physics Letters, vol. 102, 2013, pp. 1-4. https://doi.org/10.1063/1.4803710
[19] S. Tenbohlen, M. Koch, Ageing Performance and Moisture Solubility of Vegetable Oils for Power Transformers, IEEE Trans. Power. Del., Vol. 25, 2010, pp. 825-830.
https://doi.org/10.1109/TPWRD.2009.2034747