Electrical Breakdown Voltage of Palm Oil and Nano Graphene Filler in Nanofluids Application on Transformer Insulating Oil

Abstract:

Generally, power transformers have been using mineral oil as a liquid insulator due to its availability and excellent dielectric property. However, petroleum sources are depleting, which implies that mineral oil is going to be limited in availability. So, this research is to investigate on vegetable oil with nanographene filler as a substitution. Vegetable insulating oil is considered as environment-friendly insulating oil due to their superiority of biodegradable, nature-friendly, high fire-point, and good level of breakdown voltage (BV). Nevertheless, vegetable insulating oil have high viscosity, leading to a slow flow rate on the cooling performance of power transformers. To solve this problem, a process of transesterification was used to produce palm oil methyl ester (POME) from a refined bleached deodorized palm olein (RBDPO) to reduce its viscosity. RBDPO and POME were used as two kinds of fluid-based to combine with graphene nanoparticles (GNPs). Electrical breakdown voltage tests were performed by the IEC60156 standard. The results shown that POME have higher BV than RBDPO but adding GNPs may lead to lower BV even with a small amount of concentration. Nevertheless, every nanofluid has a higher BV than 30 kV.

• Periodical: Key Engineering Materials (Volume 902)
• Pages: 59-63
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.902.59
• Online since: October 2021
• Authors: Kanin Wajanasoonthon*, Amnart Suksri
• Keywords: Breakdown Voltage, Insulating Oil, Methyl Esters, Nanofluid, Nanographene, Palm Oil

References

[1] Oommen, T. V. (2002). Vegetable oils for liquid-filled transformers. IEEE Electrical Insulation Magazine, 18(1), 6–11. https://doi.org/10.1109/57.981322.

DOI: 10.1109/57.981322

[2] Perrier, C., & Beroual, A. (2009). Experimental investigations on insulating liquids for power transformers: Mineral, ester, and silicone oils. IEEE Electrical Insulation Magazine, 25(6), 6–13. https://doi.org/10.1109/mei.2009.5313705.

DOI: 10.1109/mei.2009.5313705

[3] Mohan Rao, U., Fofana, I., Jaya, T., Rodriguez-Celis, E. M., Jalbert, J., & Picher, P. (2019). Alternative dielectric fluids for transformer insulation system: Progress, challenges, and future prospects. IEEE Access, 7, 184552–184571. https://doi.org/10.1109/ACCESS.2019.2960020.

DOI: 10.1109/access.2019.2960020

[4] Sitorus, H. B. H., Setiabudy, R., Bismo, S., & Beroual, A. (2016). Jatropha curcas methyl ester oil obtaining as vegetable insulating oil. IEEE Transactions on Dielectrics and Electrical Insulation, 23(4), 2021–2028. https://doi.org/10.1109/TDEI.2016.7556474.

DOI: 10.1109/tdei.2016.7556474

[5] Yu, H., Yu, P., & Luo, Y. (2017). Renewable low-viscosity dielectrics based on vegetable oil methyl esters. Journal of Electrical Engineering and Technology, 12(2), 820–829. https://doi.org/10.5370/JEET.2017.12.2.820.

DOI: 10.5370/jeet.2017.12.2.820

[6] El-Araby, R., Amin, A., El Morsi, A. K., El-Ibiari, N. N., & El-Diwani, G. I. (2018). Study on the characteristics of palm oil–biodiesel–diesel fuel blend. Egyptian Journal of Petroleum, 27(2), 187–194. https://doi.org/10.1016/j.ejpe.2017.03.002.

DOI: 10.1016/j.ejpe.2017.03.002

[7] Alicia, C. P. Y., W, R., Khalid, M., Rasheed, A. K., & Gupta, T. (2016). Synthesis and thermo-physical characterization of graphene based transformer oil. Journal of Engineering Science and Technology, 11, 140–152.

[8] Bhunia, M., Panigrahi, K., Das, S., Chattopadhyay, K., & Chattopadhyay, P. (2018). Amorphous graphene – Transformer oil nanofluids with superior thermal and insulating properties. Carbon, 139. https://doi.org/10.1016/j.carbon.2018.08.012.

DOI: 10.1016/j.carbon.2018.08.012

[9] Dhar, P., Chattopadhyay, A., Maganti, L. S., & Harikrishnan, A. R. (2019). Streamer evolution arrest governed amplified AC breakdown strength of graphene and CNT colloids. EPJ Applied Physics, 85(3), 1–11. https://doi.org/10.1051/epjap/2019180360.

DOI: 10.1051/epjap/2019180360

[10] Sima, W., Shi, J., Yang, Q., Huang, S., & Cao, X. (2015). Effects of conductivity and permittivity of nanoparticle on transformer oil insulation performance: Experiment and theory. IEEE Transactions on Dielectrics and Electrical Insulation, 22(1), 380–390. https://doi.org/10.1109/TDEI.2014.004277.

DOI: 10.1109/tdei.2014.004277

[11] Makmud, M. Z. H., Illias, H. A., Chee, C. Y., & Dabbak, S. Z. A. (2019). Partial discharge in nanofluid insulation material with conductive and semiconductive nanoparticles. Materials, 12(5). https://doi.org/10.3390/MA12050816.

DOI: 10.3390/ma12050816