Evaluation on the Lightning Breakdown Voltages of Palm Oil and Coconut Oil under Non-Uniform Field at Small Gap Distances

Yee Von Thien; Norhafiz Azis; Jasronita Jasni; Mohd Zainal Abidin Ab Kadir; Robiah Yunus; Mohd Taufiq Ishak; Zaini Yaakub

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저자정보: Yee Von Thien (Universiti Putra Malaysia) Norhafiz Azis (Universiti Putra Malaysia) Jasronita Jasni (Universiti Putra Malaysia) Mohd Zainal Abidin Ab Kadir (Universiti Putra Malaysia) Robiah Yunus (Universiti Putra) Mohd Taufiq Ishak (Universiti Pertahanan Nasional Malaysia) Zaini Yaakub (Hyrax Oil Sdn.)

저널정보: 대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.11 No.1

발행연도: 2016.1

수록면: 184 - 191 (8page)

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In recent years, there are a number of studies that have been carried out to explore the alternative for Mineral Oil (MO) as dielectric insulating fluid in transformers due to the increasing tight regulation on safety and environment. Vegetable oils have been identified as suitable candidate since it is biodegradable, non-toxic and high flash/fire points which ensure more in-service safety. Among the types of vegetable oils considered for transformers application are Palm Oil (PO) and Coconut Oil (CO). This paper presents an experimental study on the lightning breakdown voltages of PO and CO under non-uniform electric field based on needle-sphere electrodes configuration at 3 small gap distances. The type of PO used in this study is Refined Bleached and Deodorized Palm Oil (RBDPO) Olein. The main focus of this study is to examine the lightning breakdown performance of RBDPO and CO under different test conditions and assess its suitability as dielectric insulating fluid in transformers. The effect of voltage polarities (positive and negative) and testing methods (risingvoltage, up-and-down and multiple-voltage) were investigated. The data obtained from all tests were analysed by Weibull distribution in order to determine the withstand voltages for each type of oils. It was found that the breakdown voltages of RBDPO and CO are comparable with MO under positive lightning impulse. Under negative lightning impulse, the breakdown voltage of MO is slightly higher than RBDPO and CO. There is no significant effect of testing methods and voltage polarities on lightning breakdown voltages of RBDPO and CO. Based on the statistical analysis, it is found that the breakdown voltages of RBDPO and CO at 1% probability are slightly lower than MO.

#Palm oil #Coconut oil #Lightning breakdown voltage #Non-uniform field #Transformers

참고문헌 (32)

참고문헌 신청

“Sime Darby Plantation-Palm oil facts and figures,” 2014.

U. U. Abdullahi, S. M. Bashi, R. Yunus, Mohibullah, and H. A. Nurdin, “The potentials of palm oil as a dielectric fluid,” National Proceedings of Power and Energy Conference (PECon), pp. 224-228, 2004.

Suwarno and S. Aditama, “Dielectric properties of palm oils as liquid insulating materials: effects of fat content,” International Symposium on Electrical Insulating Materials (ISEIM), vol. 1, pp. 91-94, June 2005.

A. Rajab, Suwarno, and S. Aminuddin, “Properties of RBDPO Oleum as a candidate of palm basedtransformer insulating liquid,” International Conference on Electrical Engineering and Informatics (ICEEI), vol. 02, pp. 548-552, August 2009.

A. Rajab, A. S. S. Sudirham, and Suwarno, “A Comparison of dielectric properties of palm oil with mineral and synthetic types insulating liquid under temperature variation,” Inst. Technology Bandung J. Eng. Sci., vol. 43, pp. 191-208, 2011.

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