전력분야의 바이오 기반 친환경 전기 절연유 적용에 관한 개발 동향 분석 = Analysis of Development Trends on Bio-based Environmental Transformers Oils in Power Sector

다국어 초록 (Multilingual Abstract)

Mineral electrical insulating oil, which is widely used in transformers, exhibits excellent cooling performance and transformer efficiency. However, given that it is composed of petroleum-based components, it is weak in terms of biodegradability. This causes environmental problems in case of leakage and a low flash point, which is a factor that would cause great damage in the event of a fire in a substation. In this context, the use of eco-friendly electric insulating oil composed of bio-based vegetable oil and synthetic ester, which has excellent biodegradability and flame retardancy performance, has recently been expanded to the field of electric power, and various research and development (R&D) studies are in progress. According to different research results, vegetable oil and synthetic ester manufacturing technology, thermal stability, oxidation stability, property change, and quality control, which are characteristics of eco-friendly electrical insulating oils, are major factors affecting the maintenance of insulating oil properties. In addition, power companies have established and operated quality control standards according to the use of eco-friendly electrical insulating oil as they expand the exploitatoin of renewable energy in electricity production. In particular, deterioration and oxidation characteristics were jointly identified in R&D as an important influencing factor according to the content of saturated and unsaturated fatty acids present in vegetable oils and synthetic esters in power transformer applications.

참고문헌 (Reference)

1 Przybylek, P, "Water saturation limit of insulating liquids and hygroscopicity of cellulose in aspect of moisture determination in oil-paper insulation" 23 (23): 1886-1893, 2016

2 Fandiño, O, "Volumetric Behaviour of the Environmentally Compatible Lubricants Pentaerythritol Tetraheptanoate and Pentaerythritol Tetranonanoate at High Pressures" 7 (7): 775-783, 2005

3 Oommen, T. V, "Vegetable oils for liquid-filled transformers" 18 (18): 6-11, 2002

4 Fox, N. J, "Vegetable oil-based lubricants-a review of oxidation" 40 : 1035-1046, 2007

5 Martins, M. A, "Vegetable Oils, an Alternative to Mineral Oil for Power Transformers - Experimental Study of Paper Aging in Vegetable Oil Versus Mineral Oil" 26 (26): 7-13, 2010

6 Karak, N, "Vegetable Oil-based Polymers Properties, Processing and Application" Woodhead Publishing 96-125, 2012

7 Rafiq, M, "Use of vegetable oils as transformer oils - a review" 52 (52): 308-324, 2015

8 Urness, K. N, "Thermal Decomposition Kinetics of Polyol Ester Lubricants" 30 (30): 10161-10170, 2016

9 Gunstone, F, "The Chemistry of Oils and Fats: Sources, Composition, Properties and Uses" CRC Press 2004

10 Smith, J. R. L, "The Autoxidation of Simple Esters : Towards an Understanding of the Chemistry of Degradation of Polyol Esters Used as Lubricants" 46 : 1-14, 2003

11 Gertz, C, "Testing and comparing oxidative stability of vegetable oils and fats at frying temperature" 102 (102): 543-551, 2000

12 Al-Amin, H, "Synthetic ester transformer fluid: A total solution to windpark transformer technology" 49 : 33-38, 2013

13 Medrano, M, "State of the art on high temperature thermal energy storage for power generation Part 2-case studies" 14 (14): 56-72, 2010

14 Walvekar, R, "Stability, thermo-physical and electrical properties of naphthenic/POME blended transformer oil nanofluids" 23 (23): 100878-, 2021

15 Gomna, A, "Review of vegetable oils behaviour at high temperature for solar plants: Stability, properties and current applications" 200 (200): 109956-, 2019

16 Fortes, I. C. P, "Pyrolysis-GC/MS studies of vegetable oils from Macauba fruit" 72 (72): 103-111, 2004

17 Alencar, J. W, "Pyrolysis of tropical vegetable oils" 31 (31): 1268-1270, 1983

18 S. Gryglewicz, "Preparation of polyol esters based on vegetable and animal fats" Elsevier BV 87 (87): 35-39, 2003

19 Merrill, L. I, "Oxidative stability of conventional and high-oleic vegetable oils with added antioxidants" 85 (85): 771-776, 2008

20 Asadauskas, S, "Oxidative Stability and Antiwear Properties of High Oleic Vegetable Oils" 52 (52): 877-882, 1996

21 Adhvaryu, A, "Oxidation kinetic studies of oils derived from unmodified and genetically modified vegetables using pressurized di?erential scanning calorimetry and nuclear magnetic resonance spectroscopy" 364 (364): 87-97, 2000

22 Karis, T. E, "Oxidation Chemistry of a Pentaerythritol Tetraester Oil" 42 (42): 431-442, 1999

23 Ruzaimah Nik Mohamad Kamil, "Optimization of polyol ester production by transesterification of Jatropha-based methyl ester with trimethylolpropane using Taguchi design of experiment" Elsevier BV 90 (90): 2343-2345, 2011

24 Wang, D, "Novel Testing System for Evaluating the Thermal Stability of Polyol Ester Lubricants" 43 : 6638-6646, 2004

25 Ghani, S. A, "Methods for improving the workability of natural ester insulating oils in power transformer applications: A review" 163 (163): 655-666, 2018

26 Hamilton, E. J, "Kinetics and Mechanism of the Autoxidation of Pentaerythrityl Tetraheptanoate at 180-220oC" 12 (12): 577-603, 1980

27 Kenda, E. S, "Jatropha curcas crude oil as heat transfer fluid or thermal energy storage material for concentrating solar power plants" 40 : 59-67, 2017

28 Das, A. K, "Jatropha Curcas oil for distribution transformer-A comparative review" 6 (6): 101259-, 2021

29 Monyem, A, "Investigation of Biodiesel Thermal Stability Under Simulated In-use Conditions" 16 (16): 373-378, 2000

30 Lin, S. S, "Introduction to Fats and Oils" AOCS Publication 211-231, 1997

31 Raeisian, L, "Feasibility study of waste vegetable oil as an alternative cooling medium in transformers" 151 : 308-317, 2019

32 Orsavova, J, "Fatty Acids Composition of Vegetagle Oils and its Contribution to Dietary Energy Intake and Dependence of Cardiovascular Mortality on Dietary Intake of Fatty Acids" 16 (16): 12871-12890, 2015

33 Perrier, C, "Experimental investigations on insulating liquids for power transformers: mineral, ester, and silicone oils" 25 (25): 6-13, 2009

34 Adhvaryu, A, "Epoxidized soybean oil as a potential source of high- temperature lubricants" 15 (15): 247-254, 2002

35 Raof, N. A, "Effect of molecular structure on oxidative degradation of ester based transformer oil" 140 : 105852-, 2019

36 Banu, M, "Effect of antioxidant on thermal stability of vegetable oils by using ultrasonic studies" 23 (23): 528-536, 2016

37 Kim, J. -K, "Effect of Accelerated High Temperature on Oxidation and Polymerization of Biodiesel from vegetable Oils" 11 (11): 3514-, 2018

38 Lima, D. G, "Diesel-like fuel obtained by pyrolysis of vegetable oils" 71 : 987-996, 2004

39 Feil, D. L. P, "Development of an efficient distribution transformer using amorphous core and vegetable insulation oil" 144 : 268-279, 2017

40 Evangelista Jr, "Development of a new bio-based insulating fluid from Jatropha curcas oil for power transformers" 7 (7): 235-255, 2017

41 Naz, S, "Deterioration of olive, corn and soybeanoils due to air, light, heat and deep-frying" 38 (38): 127-134, 2005

42 Fandiño, O, "Density Measurements Under Pressure for Mixtures of Pentaerythritol Ester Lubricants. Analysis of a Density-Viscosity Relationship" 52 (52): 1429-1436, 2007

43 Ong, H. C, "Comparison of palm oil, Jatropha curcas and Calophyllum inophyllum for biodiesel: A review" 15 (15): 3501-3515, 2011

44 Maurad, Z. A, "Combined Esterification and Short-Path Distillation for High Purity Pentaerito Ester from Kernel for Biolubricants" 12149-, 2018

45 Choe, E, "Chemistry of deep-fat frying oils" 2 (2): 77-86, 2007

46 Demirbas, A, "Chemical and Fuel Properties of Seventeen Vegetable Oils" 25 : 721-728, 2003

47 J.-K. KIM ; E. S. YIM ; C. H. JEON ; C.-S. JUNG ; B. H. HAN, "COLD PERFORMANCE OF VARIOUS BIODIESEL FUEL BLENDS AT LOW TEMPERATURE" 한국자동차공학회 13 (13): 293-300, 2012

48 Aziz, N. A. M, "Application of response surface methology(RSM)for optimizing the palm-based pentaerythritol ester synthesis" 62 : 305-312, 2014

49 Cecilia, J. A, "An Overview of the Biolubricant Production Process: Challenges and Future Perspective" 8 (8): 257-, 2020

50 Tenbohlen, S, "Aging performance and moisture solubility of vegetable oils for power transformers" 25 (25): 825-830, 2010

51 Souza, A. G, "A thermoanalytic and kinetic study of sunflower oil" 21 (21): 265-273, 2004

52 Syahir, A. Z, "A review on bio-based lubricants and their applications" 168 : 997-1016, 2017

53 Liao, R, "A comparative study of physicochemical, dielectric and thermal properties of pressboard insulation impregnated with natural ester and mineral oil" 18 (18): 1626-1637, 2011

54 Rozga, P, "A Review on Synthetic Ester Liquids for Transformer Applications" 13 (13): 6429-, 2020

55 Fofana, I, "50 years in the development of insulating liquids" 29 (29): 13-25, 2013

56 Padmaja, K. V, "10-undecenoic acid-based polyol esters as potentential lubricant base stocks" 35 (35): 237-240, 2012