PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY

This paper presents a statistical study on the AC Breakdown Voltage (BDV) of Refined, Bleached and Deodorized Palm Oil (RBDPO) olein under the influence of moisture. Different moisture contents of the RBPDPO were prepared by drying the RBDPO in the oven at different time intervals. The AC BDV test of RBDPO was performed whereby the distance between 2 electrodes was set to 1 mm. The statistical analyses of AC BDV data for RBDPO were carried out based on normal, lognormal and Weibull distributions. It was shown that as the moisture content increased, the AC BDV of RDBPO decreased exponentially. Statistical analyses revealed that the AC BDV data with different moisture contents had platykurtic distributions. Moisture could influence the skewness of the distribution whereby the tail shifted from right to left as the content increased. At different moisture contents of RBDPO, most of the AC BDV data of RBDPO could be represented by Weibull distribution.

• Aditama, S. (2005). Dielectric properties of palm oils as liquid insulating materials: Effects of fat content. In Proceedings of 2005 International Symposium on Electrical Insulating Materials, 2005. (ISEIM 2005) (Vol. 1, pp. 91-94). Tokyo, Japan: Yasuo Muraoka. doi: 10.1109/ISEIM.2005.193334

• ASTM D1816-12. (2019). Standard test method for dielectric breakdown voltage of insulating liquids using VDE electrodes. West Conshohocken, USA: ASTM International

• ASTM D6304-16e1. (2016). Standard test method for determination of water in petroleum products, lubricating oils, and additives by Coulometric Karl Fischer Titration. West Conshohocken, USA: ASTM International

• Azis, N., Jasni, J., Kadir, M. Z. A., & Mohtar, M. N. (2014). Suitability of palm based oil as dielectric insulating fluid in transformers. Journal of Electrical Engineering and Technology, 9(2), 662-669. doi: 10.5370/jeet.2014.9.2.662

• Heathcore, M. K. (2007). The J and P transformer book. Oxford, United Kingdom: Elservier.

• Kiasatina, Kamarol, M., Zulhilmey, M., & Arief, Y. A. (2011, June 21-22). Breakdown characteristics of RBDPO and soybean oil mixture for transformer application. In Proceedings of the International Conference on Electrical, Control and Computer Engineering 2011 (InECCE) (pp. 219-222). Pahang, Malaysia. doi: 10.1109/INECCE.2011.5953879

• Martin, D., & Wang, Z. D. (2006, October 15-18). A comparative study of the impact of moisture on the dielectric capability of esters for large power transformers. In Proceedings of 2006 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (pp. 409 - 412). Kansas City, MO, USA. doi: 10.1109/CEIDP.2006.311956.

• Martin, D., & Wang, Z. D. (2008). Statistical analysis of the AC breakdown voltages of ester based transformer oils. IEEE Transactions on Dielectrics and Electrical Insulation, 15(4), 1044-1050. doi: 10.1109/TDEI.2008.4591226

• Martins, M. A. G. (2010). Vegetable oils, an alternative to mineral oil for power transformers-experimental study of paper aging in vegetable oil versus mineral oil. IEEE Electrical Insulation Magazine, 8(3), 7-13. doi: 10.1109/MEI.2010.5599974

• Mehmood, M. A., Li, J., Huan, Z., Wang, F., Li, X., Bhutta, M. S., & Li, X. (2018, September 10-13). Effects of suspended moisture particles on AC breakdown voltage and electric field distribution of vegetable insulation oil. In Proceedings of 2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE) (pp. 1-4). Athens, Greece. doi: 10.1109/ICHVE.2018.8641957

• Mohamad, N. A., Azis, N., Jasni, J., Kadir, M. Z. A., Yunus, R., Ishak, M. T, & Yaakub, Z. (2015). A study on the dielectric properties of RBDPO olein under low temperature thermal ageing. Applied Mechanics and Materials, 793, 14-18. doi: 10.4028/www.scientific.net/AMM.793.14

• Mohamad, N. A., Azis, N., Jasni, J., Kadir, M. Z. A., Yunus, R., Ishak, M. T., & Yaakub, Z. (2014, December 1-3). A study on the dielectric properties of palm oil and coconut oil. In Proceedings of the 2014 IEEE International Conference on Power and Energy (PECon) (pp. 109-112). Kuching, Malaysia. doi: 10.1109/PECON.2014.7062423

• Murad, N. S., Muhamad, N. A., Suleiman A. A., & Jamail, N. A. M. (2013, October 20-23). A study on palm oil-based oil moisture absorption level and voltage breakdown. In Proceedings of 2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (pp. 925-928). Shenzhen, China. doi: 10.1109/CEIDP.2013.6748188

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

• Primo V. A., García, B., Pérez, D., & Burgos, J. C. (2019, June 23-27). Analysing the impact of moisture on the AC breakdown voltage on natural ester based nanodielectric fluids. In Proceedings of 2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) (pp. 1-4). Roma, Italy. doi: 10.1109/ICDL.2019.8796675

• Rafiq, M., Lv, Y. Z., Zhou, Y., Ma, K. B., Wang, W., Li, C. R., & Wang, Q. (2015). Use of vegetable oils as transformer oils - A review. Renewable and Sustainable Energy Reviews, 52, 308-324. doi: https://doi.org/10.1016/j.rser.2015.07.032

• Suleiman, A. A., Muhamad, N. A., Bashir, N., Murad, N. S., Arief, Y. Z., & Phung, B. T. (2014). Effect of moisture on breakdown voltage and structure of palm based insulation oils. IEEE Transactions on Dielectrics and Electrical Insulation, 21(5), 2119-2126. doi: 10.1109/TDEI.2014.004431

• Suleiman, A., & Muhamad, N. A. (2011). A case for the establishment of Malaysian standard for biodegradable insulation oil in Malaysia transformers. International Review on Modelling and Simulations, 4(6), 2756-2763.

• Suwarno, S., & Prakoso, M. (2015). Effects of water content on dielectric properties of mineral transformer oil. International Journal of Electrical and Computer Engineering, 9(10), 1142-1146. doi: 10.5281/zenodo.1109353

• Suwarno, Sitinjak, F., Suhariadi, I., & Imsak, L. (2003, June 1-5). Study on the characteristics of palm oil and it’s derivatives as liquid insulating materials. In Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Vol. 2, pp. 495-498). Nagoya, Japan. doi: 10.1109/ICPADM.2003.1218461

• Takaaki, K., Hiroyuki, I., Yoshiyuki, H., Junichi, Y., Tomoyuki, H., Akina, Y., … & Yasunori, H. (2008, June 30 - July 3). Analyses of electro-chemical characteristics of palm fatty acid esters as insulating oil. In Proceedings of 2008 IEEE International Conference on Dielectric Liquids (pp. 1-4). Futuroscope-Chasseneuil, France. doi: 10.1109/ICDL.2008.4622456

• Tenbohlen, S., & Koch, M. (2010). Aging performance and moisture solubility of vegetable oils for power transformers. IEEE Transactions on Power Delivery, 25(2), 825-830. doi: 10.1109/TPWRD.2009.2034747

• Wang, X., & Wang, Z. D. (2008, October 26-29). Particle effect on breakdown voltage of mineral and ester based transformer oils. In Proceedings of 2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (pp. 598-602). Quebec, Canada. doi: 10.1109/CEIDP.2008.4772859