Effect of Concentration of Al2O3 Nanoparticles on Electrical Properties of Mineral Oil
DOI:
https://doi.org/10.48048/tis.2021.21Keywords:
Mineral oil, Nanoparticles, AC breakdown voltage, Lightning impulse voltageAbstract
This study aimed to compare the electrical characteristics of mineral oil-based nanoparticles to those of pure mineral oil. Mineral oil used in distribution transformers was mixed with aluminum oxide (Al2O3) nanoparticles, which serve as an insulator, with 0.01, 0.03, and 0.05 % mineral oil volume concentrations. The moisture content in mineral oil was measured beforehand, and the electrical tests were subsequently conducted in accordance with international standards. The moisture content test revealed that the combination of nanoparticles and mineral oil resulted in an increase in moisture content. As regards the test of AC withstanding voltage and negative polarity lightning impulse voltage, it was found that the mineral oil mixed with the nanoparticles had higher dielectric strength than the original mineral oil. In addition, the test results of positive polarity lightning impulse voltage demonstrated that with a mixture of mineral oil and the nanoparticles at a 0.01 % concentration, the positive polarity lightning impulse dielectric strength of the mineral oil increased. However, at concentrations of 0.03 and 0.05 %, it did not rise, regardless of the increasing volume of nanoparticles. The results, thus, showed promising directions for applications of nanoparticles in the development of electrical properties of mineral oil.
HIGHLIGHTS
- The addition of Al2O3 nanoparticles to the mineral oil resulted in an increase in the oil moisture content. However, it was found that the moisture content in the mineral oil tended to decrease with the increase in the amount of nanoparticles
- The optimum nanofluid combination in terms of increased AC breakdown strength was created by adding Al2O3 nanoparticles to mineral oil at a rate of 0.05 vol%
- The Al2O3 nanoparticles being added to the mineral oil can give an increase in the impulse breakdown voltage with the negative polarity
- For the positive polarity of the impulse breakdown voltage, the best nanofluid mixture in terms of increased breakdown strength was produced by the addition of Al2O3 nanoparticles at a rate of 0.01 vol% to the mineral oil
GRAPHICAL ABSTRACT
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M Pichai and P Norasage. Dielectric breakdown strength of mineral oil based nanofluids. In: Proceedings of the International Conference on Condition Monitoring and Diagnosis, Xi’an, China. 2016, p. 261-4.
CL Jong and YK Woo. Experimental study on the dielectric breakdown voltage of the insulating oil mixed with magnetic nanoparticles. Phys. Proc. 2012; 32: 327-34.
R Liu, LAA Petterson, T Auletta and O Hjortstam. Fundamental research on the application of nano dielectrics to transformers. In: Proceeding of the 2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Cancun, Mexico. 2011, p. 423-7.
M Rafiq, Y Lv and C Li. A review on properties, opportunities, and challenges of transformer oil-based nanofluids. J. Nanomater. 2016; 2016, 8371560.
N Pattanadech. 2013, Partial discharge inception voltage characteristics of mineral oil. Ph. D. Dissertation. Graz University of Technology, Graz, Austria.
H Jin. 2015, Dielectric strength and thermal conductivity of mineral oil based nanofluids. Ph.D. Dissertation. Delft University of Technology, Amsterdam, the Netherlands.
SC Pugazhendhi. Experimental evaluation on dielectric and thermal characteristics of nano filler added transformer oil. In: Proceedings of the International Conference on High Voltage Engineering and Application, Shanghai, China. 2012, p. 207-10.
DA Mansour, EG Atiya, RM Khattab and AM Azmy. Effect of titania nanoparticles on the dielectric properties of transformer oil-based nanofluids. In: Proceedings of the 2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Montreal QC, Canada. 2012, p. 295-8.
M Nazari, MH Rasoulifard and H Hosseini. Dielectric breakdown strength of magnetic nanofluid based on insulation oil after impulse test. J. Magn. Magn. Mater. 2016; 399: 1-4.
Y Du, Y Lv, C Li, M Chen, Y Zhong, J Zhou, X Li, Y Zhou. 2012. Effect of semiconductive nanoparticles on insulating performances of transformer oil. IEEE Trans. Dielectr. Electr. Insul. 2012; 19, 770-6.
Y Lv, W Wang, K Ma, S Zhang, Y Zhou, C Li and Q Wang. Nanoparticle effect on dielectric breakdown strength of transformer oil-based nanofluids. In: Proceedings of the 2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Chenzhen, China. 2013, p. 680-2.
SK Das, SU Choi, W Yu and T Pradeep. Nanofluids: Science and technology. John Wiley & Sons, New Jersey, 2007.
SUS Choi and JA Eastman. Enhancing thermal conductivity of fluids with nanoparticles. In: Proceedings of the 1995 International Mechanical Engineering Congress and Exhibition, San Francisco, CA. 1995, p. 99-105.
V Segal, K Linsley, A Hjortsberg and A Rabinovich. AC (60 Hz) and impulse breakdown strength of a colloidal fluid based on transformer oil and magnetite nanoparticles. In: Proceedings of the 1998 IEEE International Symposium on Electrical Insulation, Arlington VA, USA. 1998, p. 619-22.
H Jin, T Andritsch, IA Tsekmes, R Kochetov, PHF Morshuis and JJ Smit. Properties of mineral oil based silica nanofluids. IEEE Trans. Dielectr. Electr. Insul. 2014; 21, 1100-8.
A Cavallini, R Karthik and F Negri. The effect of magnetite, graphene oxide and silicone oxide nanoparticles on dielectric withstand characteristics of mineral oil. IEEE Trans. Dielectr. Electr. Insul. 2005; 22, 2592-600.
DEA Mansour, AM Elsaeed and MA Izzularab. The role of interfacial zone in dielectric properties of transformer oil-based nanofluids. IEEE Trans. Dielectr. Electr. Insul. 2016; 23, 3364-72.
M Rafiq, Y Lv and C Li. Effect of shape, surface modification and concentration of Al2O3 nanoparticles on breakdown performance of transformer oil. J. Electr. Eng. Tech. 2019; 15, 457-68.
Q Wang, M Rafiq, Y Lv, C Li and K Yi. Preparation of three types of transformer oil-based nanofluids and comparative study on the effect of nanoparticle concentrations on insulating property of transformer oil. J. Nanotechnol. 2016; 2016, 5802753.
JA Mergos, MD Athanassopoulou, TG Argyropoulos and CT Dervos. 2012. Dielectric properties of nanopowder dispersions in paraffin oil. IEEE Trans. Dielectr. Electr. Insul. 2012; 19, 1502-7.
F Herchl, K Marton, L Tomco, P Kopcansky, M Timko, M Koneracka and I Kolcunova. Breakdown and partial discharges in magnetic liquids. J. Phys. Condens. Matter. 2008; 20, 204110.
Inframat Advanced Materials LLC, Availble at: http://www.advancedmaterials.us/26N-0802A.htm, accessed May 2020.
ASTM D1533. Standard test method for water in insulating liquids by coulometric Karl Fischer titration. ASTM International, 2013.
IEC 60156. Insulating liquids determination of the breakdown voltage at power frequency test method. 2nd ed. International Standard, 1995.
IEC 60897. Methods for the determination of the lightning impulse breakdown voltage of insulating liquids. 1st ed. International Electrotechnical Commission, 1987.
G Smith. Essential statistics, regression, and econometrics. Academic Press, USA, 2012.
P Muangpratoom and N Pattanadech. Dielectric properties of mineral oil-based nanofluids under temperature variations. IET Sci. Meas. Tech. 2019; 13, 1318-25.
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