Browse > Article
http://dx.doi.org/10.14478/ace.2016.1070

Oxidation Characteristic Changes in Insulation Oil Depending upon Storage Environments and Oil Resources  

Lee, Don-Min (Petroleum Technology R&D Center, Korea Petroleum Quality & Distribution Authority)
Park, Cheon-Kyu (Petroleum Technology R&D Center, Korea Petroleum Quality & Distribution Authority)
Ha, Jong-Han (Petroleum Technology R&D Center, Korea Petroleum Quality & Distribution Authority)
Lee, Bong-Hee (Dept. of Chemical Engineering, Chungbuk National University)
Publication Information
Applied Chemistry for Engineering / v.27, no.5, 2016 , pp. 495-501 More about this Journal
Abstract
Mineral oil has been widely used as an insulating oil for electrical transformers for a long time, but the necessity of employing new insulation oil such as vegetable oil has been increased due to urgent needs for the biodegradability when it leaks and also for the thermal stability at a higher operation temperature. Although specific periods are required between the production and consumption, there are still short of the data to prove the insulation oils' storage stability depending upon various circumstances and their resources. Thus, this paper demonstrates the insulation oils' oxidation characteristics of both mineral and vegetable oils when each was exposed to different environments for 12 weeks. From this test, some properties including total acid number, water content and dielectric breakdown were changed under specific conditions and resources. Vegetable oils showed higher hydrophilicity and water saturation than those of mineral oils due to their molecular compositions. Under sunlight exposure condition, all insulation oils oxidized and changed their properties when exposing to the direct light, regardless of the resource used.
Keywords
insulation oil; mineral oil; vegetable oil; oxidation characteristics; storage stability;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 E. J. Jang, M. E, Lee, J. Y. Park, K. I. Min, E. S. Yim, J. H. Ha, and B. H. Lee, A study on the quality characteristics of feedstocks for power bio-fuel oil, J. Korean Oil Chem. Soc., 32, 136-147 (2015).   DOI
2 J. H. Kim, J. W. Kim, H. O. Lee, and H. B Lee, Characteristics of natural ester applied to environment-friendly power transformer, Proceedings of the ITFE Summer Conference, August 25-27, Seoul, Korea (2011).
3 KS C IEC 60156, Insulation liquids-Determination of the breakdown voltage at power frequency - test, Korean Agency for Technology and Standards (2003).
4 C. H. Nam, S. B. Kim, H. J. Park, and S. J. Hwang, The measurement of total acid number in transformer oils using simple analytical equipment, Proceedings of the KIEE Autumn Conference, 397-399, November 7, Jeju, Korea (2008).
5 KS C 2101, Testing Methods of Electrical Insulating Oils, KATS (2006).
6 S. H. Choi and C. S. Huh, Research of accelerated aging according to long-term stability of vegetable oil, Korean. Inst. Electr. Eng., 61, 8, 1148-1152 (2012).
7 M. Hemmer, R. Badent, and A. J. Schwab, Electrical properties of rapeseed oil, Annual Report Conference on Electrical Insulation and Dielectric Phenomena, October 20-24, Cancun, Mexico (2002).
8 N. A. Gomez, R. Abonia, and H. Canavid, Chemical and spectroscopic characterization of a vegetable oil used as dielectric Coolant in distribution transformers, J. Braz. Chem. Soc., 22, 12, 2292-2303 (2011).
9 KEPCO, 2015 KEPCO in Brief, 9-10, KEPCO Power Market & Policy Department, Naju, Korea (2016).
10 D. S. Kwag, Breakdown properties for insulation design of the environment- friendly pole transformer using the vegetable insulating oil, J. Korean Soc. Saf., 26, 6, 7-12 (2011).
11 S. H. Choi, J. I. Jeong, and C. S. Huh, Analysis on chemical and electrical characteristic of vegetable oil by accelerated aging, Trans. Korean. Inst. Electr. Eng., 60, 5, 984-989 (2011).   DOI
12 D. Martin, N. Lelekakis, Wenyu Guo, and Y. Odarenko, Further studies of a vegetable-oil-filled power transformer, IEEE Electr. Insul. Mag., 27, 5, 6-13 (2011).   DOI
13 C. P. McShane, Relative properties of new combustion resistant vegetable oil based dielectric coolants, IEEE-IAS/PCA Cement Industry Technology Conference, 31-40, May 22-26, St. Louis, USA (2011).
14 C. P. McShane, J. Corkran, K. Rapp, and J. Luksich, Natural ester dielectric fluid development, 2005/2006 IEEE PES Transmission and Distribution Conference and Exhibition, 18-22, May 21-24, Dalbs, USA (2006).
15 G. Knothe and K. R. Steidley, Influence of compound structure and comparison to petrodiesel fuel components, Fuel, 84, 9, 1059-1065 (2005).   DOI
16 Jian Li, S. Grazybowski, Yanfei Sun, and Xianoling Chen, Dielectric properties of rapeseed oil paper insulation, 2007 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 500-503, October 14-17 Vancouver, Canada (2007).
17 IEEE Std. C 57.91-1995, IEEE Guide for Loading Mineral-Oil- Immersed Transformers (1995).
18 S. Tenbohlen and M. Koch, Aging performance and moisture solubility of vegetable oils for power transformers, IEEE Power Deliv., 25, 2, 825-830 (2010).   DOI
19 KS C IEC 62770-2015, Fluids for electrotechnical applications-Unused natural esters for transformers and similar electrical equipment, Korean Agency for Technology and Standards (2015).
20 KS C IEC 2301-2015, Electrical insulating oils, Korean Agency for Technology and Standards (2015).
21 S. Fernando, P. Karra, R. Hernandez, and S. K. Jha, Effect of incompletely converted soybean oil on biodiesel quality, Energy, 32, 5, 844-851 (2005).   DOI
22 E. C. Zuleta, L. A. Rios, and R. N. Benjumea, Oxidation stability and cold flow behavior of palm sacha-inchi, jatropha and castor oil biodiesel blends, Fuel Process. Technol., 102, 96-101 (2012).   DOI
23 J. Pullen and K. Saeed, An overview of biodiesel oxidation stability, J. Renew. Sustain. Energy Rev., 16, 5924-5950 (2012).   DOI
24 Amaah, Md., S. M. Islam., S. Chami, and G. Ienco, Analyses of physical characteristics of vegetable oils as an alternative source to mineral oil-based dielectric fluid, IEEE International Conference on Dielectric Liquids, 397-400, June 26-July 1, Coimbra, Portugal (2005).