Environmentally Friendly Fluids for High-Voltage Applications

  • J. E. ContrerasEmail author
  • J. Rodríguez-Díaz
  • E. A. Rodriguez
Reference work entry


Historically, hydrocarbon-based fluids have been used for several applications in the energy industry since they successfully fulfill high-voltage requirements for electrical apparatus and components. In spite of that, these conventional fluids show great disadvantages from an ecological and sustainability point of view. New “green”-based fluids have emerged as an alternative solution for the poor ecological performance of conventional mineral oil and to comply with the new environmental regulations and demands. Environmentally friendly fluids not only have adequate insulation and chemical and thermal properties for use in electrical components, but they also show remarkable advantages regarding biodegradability behavior and fire resistance performance, which give them attractive characteristics for energy industry. In this chapter, the main properties of alternative eco-fluids are shown and compared with conventional mineral oils. In addition, recent achievements for high-voltage applications are reviewed and reported. Finally, future trends and opportunities for technological breakthroughs are also considered and proposed in this chapter.


Eco-fluids Natural ester Synthetic ester Ester-based fluids Insulating fluids High voltage Dielectric Transformers Insulating materials Biodegradability 


  1. 1.
    Rosen M (2001) Teaching the environmental impact of industrial processes. Int J Mech Eng Educ 29:39–52CrossRefGoogle Scholar
  2. 2.
    OECD (2013) Putting green growth at the heart of development. OECD Publishing, Paris. Scholar
  3. 3.
    Stavins RN (1994) The challenge of going green: a perspective on environmental regulation and competitiveness. Harv Bus Rev:38–39Google Scholar
  4. 4.
    Taylor E, Kramer C, Marchionini B, Sabouni R, Cheung K, Lee DF (2015) Materials innovation for next-generation T&D grid components. Workshop Summary Report (No. ORNL/TM--2015/615). Oak Ridge National Lab (ORNL), Oak RidgeGoogle Scholar
  5. 5.
    Gonen T (2014) Electric power distribution engineering, 3rd edn. CRC Press, Boca RatonGoogle Scholar
  6. 6.
    Rafiq M, Lv YZ, Zhou Y, Ma KB, Wang W, Li CR, Wang Q (2015) Use of vegetable oils as transformer oils – a review. Renew Sust Energ Rev 52:308–324. Scholar
  7. 7.
    Stockton DP, Bland JR, McClanahan T, Wilson J, Harris DL, McShane P (2007) Natural ester transformer fluids: safety, reliability & environmental performance. IEEE petroleum and chemical industry technical conference, Calgary, pp 1–7.
  8. 8.
    Fernández I, Ortiz A, Delgado F, Renedo C, Pérez S (2013) Comparative evaluation of alternative fluids for power transformers, vol 98, pp 58–69. Scholar
  9. 9.
    Duval M, Rouse T (1994) ASTM Chapter 4 – physical and chemical properties of mineral insulating oils.
  10. 10.
    Wheeler M (2012) Insulating fluids an overview of alternative dielectric fluids used in transformers. “Life of a Transformer” DOBLE Seminar.
  11. 11.
    Harlow J (2004) Electric power transformer engineering. CRC Press, Boca RatonGoogle Scholar
  12. 12.
    Saurabh V, Prashant V (2011) Transformer’s history and its insulating oil. In: Proceedings of the 5th National Conference; INDIACom-2011Google Scholar
  13. 13.
    Borsi H (1991) Dielectric behavior of silicone and ester fluids for use in distribution transformers. IEEE Trans Electr Insul 26(4):755–762. Scholar
  14. 14.
    Yamagishi A, Sampei H, Kojima H, Morooka H (2004) Prospect of environmentally friendly and less-flammable transformer with low viscosity silicone fluid. In: International conference on electrical engineering, pp 1–6Google Scholar
  15. 15.
    Borsi H (1990) Ester fluid Midel 7131 as PCB-substitute for distribution transformers. In: 10th International conference on conduction and breakdown in dielectric liquids, Grenoble, pp 514–518.
  16. 16.
    Darwin A, Perrier C, Foliot P (2007) The use of natural ester fluids in transformer. In: Proceedings of MATPOST conference, Lyon (France), Vol. 36. p 15–16Google Scholar
  17. 17.
    Oommen TV (2002) Vegetable oils for liquid-filled transformers. IEEE Electr Insul Mag 18(1):6–11. Scholar
  18. 18.
    McShane CP, Martins MN, Luksich J (2006) Field experience with natural ester (vegetable oil) dielectric fluid-the first decade. IV Workspot-international workshop on power transformers. CIGRE 18:1–10Google Scholar
  19. 19.
    Moore SP (2009) Some considerations for new and retrofill applications of natural ester dielectric fluids in medium and large power transformers revisited. In: 2009 I.E. Power & Energy Society general meeting, Calgary, pp 1–7.
  20. 20.
    Goff MB, Eltom AH (2013) Oil filled bushing secrets revealed. In: 2013 I.E. industry applications society annual meeting, Lake Buena Vista, pp 1–9.
  21. 21.
    Prevost TA (2008) Oil circuit breaker diagnostics. In: 7th Annual Weidmann Technical Conference, New-Orleans, pp 1–10Google Scholar
  22. 22.
    Fofana I, Wasserberg V, Borsi H, Gockenbach E (2002) Challenge of mixed insulating liquids for use in high-voltage transformers. 1. Investigation of mixed liquids. IEEE Electr Insul Mag 18(3):18–31. Scholar
  23. 23.
    Beroual A, Khaled U, Mbolo Noah PS, Sitorus H (2017) Comparative study of breakdown voltage of mineral, synthetic and natural oils and based mineral oil mixtures under AC and DC voltages. Energies 10(4):511CrossRefGoogle Scholar
  24. 24.
    Kasahara Y, Kato M, Watanabe S, Iwahashi M, Wakamatsu R, Suzuki T, Kanetani A, Kano T, Tamura T (2012) Consideration on the relationship between dielectric breakdown voltage and water content in fatty acid esters. J Am Oil Chem Soc 89(7):1223–1229Google Scholar
  25. 25.
    Martin D, Wang ZD, Dyer P, Darwin AW, James IR (2007) A comparative study of the dielectric strength of ester impregnated cellulose for use in large power transformers. In: 2007 I.E. international conference on solid dielectrics, Winchester, pp 294–297.
  26. 26.
    Newesely G (2005) Transformer cooling – the impact of oil viscosity on the performance. Electric Energy T&D Mag, pp 31–32.
  27. 27.
    Gockenbach E, Borsi H (2008) Natural and synthetic ester liquids as alternative to mineral oil for power transformers. In: 2008 Annual report conference on electrical insulation and dielectric phenomena, Quebec, pp 521–524.
  28. 28.
    Smith SD (2006) Design and test experience with natural ester fluid for power transformers. In: 2005/2006 IEEE/PES transmission and distribution conference and exhibition, Dallas, pp 35–36.
  29. 29.
    Tenbohlen S, Koch M, Vukovic D, Weinläder A, Baum J, Harthun J, Schäfer M, Barker S, Frotscher R, Dohnal D, Dyer P (2008) Application of vegetable oil-based insulating fluids to hermetically sealed power transformers. Cigre session, pp 2–102Google Scholar
  30. 30.
    Rapp K J, Gauger G A, Luksich J (1999) Behavior of ester dielectric fluids near the pour point. 1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No. 99CH36319), Austin, vol 2, pp 459–462.
  31. 31.
    Holser RA (2008) Transesterification of epoxidized soybean oil to prepare epoxy methyl esters. Ind Crops Prod 27(1):130–132. Scholar
  32. 32.
    Raymon A, Pakianathan PS, Rajamani MPE, Karthik R (2013) Enhancing the critical characteristics of natural esters with antioxidants for power transformer applications. IEEE Trans Dielectr Electr Insul 20(3):899–912. Scholar
  33. 33.
    Aluyor EO, Obahiagbon KO, Ori-Jesu M (2009) Biodegradation of vegetable oils: a review. Sci Res Essay 4:543–548Google Scholar
  34. 34.
    OECD Guideline for testing of chemicals (2005) Part 1: principles and strategies related to the testing of degradation of organic chemicals.
  35. 35.
    Oommen TV, Claiborne CC, Mullen JT (1997) Biodegradable electrical insulation. Proceedings: electrical insulation conference and electrical manufacturing and coil winding conference, Rosemont, pp 465–468.
  36. 36.
    Martin R, et al (2010) Experiences in service with new insulating liquids. Working Group A2-35 CIGRE, pp 1–95Google Scholar
  37. 37.
    Lusas EW, Rhee KC (1992) Animal and vegetable fats, oils and waxes, Riegel’s Handbook of Industrial Chemistry. Springer, New York, pp 273–314Google Scholar
  38. 38.
    Pulido A, Urzua C, Cazares S, Contreras JE, Guerra D (2008) Vegetable oil of high dielectric purity, method for obtaining same and use in an electrical device. US Patent 8, 741,186Google Scholar
  39. 39.
    Pukel GJ, Schwarz R, Baumann F, Muhr HM, Eberhardt R, Wieser B, Chu (2012) Power transformers with environmentally friendly and low flammability ester liquids. Elektrotech. Inftech. Springer, Vienna. Scholar
  40. 40.
    McShane C P, Corkran J, Rapp K, Luksich J (2009) Natural ester dielectric fluid development update. In: 2009 I.E. Power & Energy Society general meeting, Calgary, pp 1–6.
  41. 41.
    McShane CP (2001) Relative properties of the new combustion-resist vegetable-oil-based dielectric coolants for distribution and power transformers. IEEE Trans Ind Appl 37(4):1132–1139. Scholar
  42. 42.
    Environmental Technology Verification Report, ABB Inc. (2002) BIOTEMP Vegetable oil-based insulating dielectric fluid. California EPAGoogle Scholar
  43. 43.
    Oommen TV, Le HD, Claiborne CC, Walsh EJ, Baker JP (2002) Enhanced cellulosic insulation life in a high oleic vegetable oil dielectric fluid. In: 69th Intl. Conf. Doble Clients, Paper 3C, April 7–12Google Scholar
  44. 44.
    Environmental Technology Verification Report (2002) Cooper Power Systems Envirotemp®FR3™ Vegetable oil-based insulating dielectric fluid. California EPAGoogle Scholar
  45. 45.
  46. 46.
    MIDEL eN Natural Ester fluids, M&I Materials Ltd.
  47. 47.
    Davydov VG (2014) Natural ester dielectric liquids for transformers and other HV apparatus, Transmission & Distribution, pp 1–3.
  48. 48.
    Perrier C, Beroual A, Bessede JL (2006) Improvement of power transformers by using mixtures of mineral oil with synthetic esters. IEEE Trans Dielectr Electr Insul 13(3):556–564. Scholar
  49. 49.
    Envirotemp™ 200 fluid THE SYNTHETIC ESTER SOLUTION, Technical Brochure.
  50. 50.
  51. 51.
    McShane CP (2002) Vegetable-oil-based dielectric coolants. IEEE Ind Appl Mag 8(3):34–41. Scholar
  52. 52.
    Rapp KJ, Luksich J, Sbravati A (2014) Application of natural ester insulating liquids in power transformers. Proceedings of My Transfo 2014, pp 1–7.
  53. 53.
    Lashbrook M (2014) Ester fluids for power transformers at >100 kV. Transformers Mag 1:14–19. Scholar
  54. 54.
    Liu Q, Wang ZD (2011) Streamer characteristic and breakdown in synthetic and natural ester transformer liquids with pressboard interface under lightning impulse. IEEE Trans Dielectr Electr Insul 18(6):1908–1917. Scholar
  55. 55.
    Moore HR (2006) Requirements and expectations of natural ester fluids for application in power transformers. In: 2005/2006 IEEE/PES transmission and distribution conference and exhibition, Dallas, pp 23–24.
  56. 56.
    Rozga P (2013) Properties of new environmentally friendly biodegradable insulating fluids for power transformers. In: 1st Annual International Interdisciplinary Conference, Portugal, pp 358–364Google Scholar
  57. 57.
    Dai J, Wang ZD (2008) A comparison of the impregnation of cellulose insulation by ester and mineral oil. IEEE Trans Dielectr Electr Insul 15(2):374–381. Scholar
  58. 58.
    Oommen TV, Prevost TA (2006) Cellulose insulation in oil-filled power transformers: part II maintaining insulation integrity and life. IEEE Electr Insul Mag 22(2):5–14. Scholar
  59. 59.
    Martin D, Khan I, Dai J, Wang ZD (2006) An overview of the suitability of vegetable oil dielectrics for use in large power transformers. TJH2b Euro Tech. Conf., pp 1–20Google Scholar
  60. 60.
    Lashbrook M, Gyore A, Ramakrishna M, Martin R (2016) The development of 400 KV transformers with ester-based dielectric liquids. In: Advanced research workshop on transformers, pp 270–275Google Scholar
  61. 61.
    Fritsche R, Rimmele U, Trautmann F, Schäfer M (2014) Prototype 420 kV power transformer using natural ester dielectric fluid. In: TjH2b-19th annual high voltage electrical equipment & management conf., proceedings of TechCon North America, pp 1–18Google Scholar
  62. 62.
    MIDEL 7131 Synthetic Ester Transformer Fluid Product Brochure.
  63. 63.
    REDUCING RISK: transformer risk management roundtable (2017) M&I Materials,, pp 38–43.
  64. 64.
    ABB lowers environmental impact of high-voltage transformers (2017) ABB Press releases.
  65. 65.
    Kumar SS, Iruthayarajan MW, Bakrutheen M (2016) Investigations on the suitability of rice bran oil and corn oil as alternative insulating liquids for transformers. IEEJ Trans Electr Electron Eng 11(1):10–14. Scholar
  66. 66.
    Abdelmalik AA (2014) Chemically modified palm kernel oil ester: a possible sustainable alternative insulating fluid. Sustain Mater Technol 1:42–51. Scholar
  67. 67.
    Azis N, Jasni J, Abidin Ab Kadir MZ, Mohtar MN (2014) Suitability of palm based oil as dielectric insulating fluid in transformers. J Electr Eng Technol 9(2):662–669CrossRefGoogle Scholar
  68. 68.
    Obande JO, Agber JU (2014) Palm oil as an alternative dielectric transformer coolant. Int J Res Eng Sci 2(6):8–13Google Scholar
  69. 69.
    Beltrán N, Palacios E, Blass G (2017) Potential of Jatropha curcas oil as a dielectric fluid for power transformers. IEEE Electr Insul Mag 33(2):8–15. Scholar
  70. 70.
    Masarakall VH, Sikdar DC, Madalageri SB, Nitture MR, Naidu JC (2015) Development of new dielectric liquid from pongamia oil as alternative for transformer oil. Int J Tech Res Appl 3(4):304–309Google Scholar
  71. 71.
    Mariprasath T, Kirubakaran V (2015) Pongamia pinnata as alternate liquid dielectrics in distribution transformer: a critical study on the property of viscosity. Adv Energy Power 3(1):1–7. Scholar
  72. 72.
    Sato M, de Bueno OC, Esperancini MST, Frigo EP (2009) A cultura do pinhão-manso (Jatropha curcas l.): uso para fins combustíveis e descrição agronômica. Varia Sci 7(13):47–62Google Scholar
  73. 73.
    Sitorus HBH, Setiabudy R, Bismo S, Beroual A (2014) Physicochemical and electrical properties of Jatropha curcas methyl ester oil as a substitute for mineral oil. In: 2014 I.E. 18th international conference on dielectric liquids (ICDL), pp 1–4.
  74. 74.
    Evangelista JM Jr, Coelho FEB, Carvalho JA, Araújo EM, Miranda TL, Salum A (2017) Development of a new bio-based insulating fluid from jatropha curcas oil for power transformers. Adv Chem Eng Sci 7(02):235–255. Scholar
  75. 75.
    Adeolu O, Adejumobi IA (2014) Breakdown voltage characteristics of castor oil as alternative to transformer insulation oil. Int J Sci Eng Res (IJSER) 2(4):31–37Google Scholar
  76. 76.
    Naranpanawe WMLB, Fernando MARM, Kumara JRSS, Naramapanawa EMSN, Kalpage CS (2013) Performance analysis of natural esters as transformer liquid insulation – coconut, castor and sesame oils. In: 2013 I.E. 8th international conference on industrial and information systems, Peradeniya, pp 105–109.
  77. 77.
    Banumathi S, Chandrasekar S (2016) Analysis of breakdown strength and physical characteristics of vegetable oils for high voltage insulation applications. J Adv Chem 12(16):4902–4912. Scholar
  78. 78.
    Choi SUS, Eastman JA (1995) Enhancing thermal conductivity of fluids with nanoparticles. American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED, Proceedings of the 1995 ASME International Mechanical Engineering Congress and Exposition; San Francisco, vol 231, pp 99–105Google Scholar
  79. 79.
    Taha-Tijerina J, Narayanan TN, Gao G, Rohde M, Tsentalovich D, Pasquali M, Ajayan P (2012) Electrically insulating thermal nano-oils using 2D fillers. ACS Nano 6(2):1214–1220. Scholar
  80. 80.
    Contreras JE, Rodriguez EA, Taha-Tijerina J (2017) Nanotechnology applications for electrical transformers – a review. Electr Power Syst Res 143:573–584. Scholar
  81. 81.
    Li J, Liao R, Yang L (2012) Investigation of natural ester based liquid dielectrics and nanofluids. In: 2012 international conference on high voltage engineering and application, Shanghai, pp 16–21.
  82. 82.
    Karthik R, Raymon A (2016) Effect of silicone oxide nano particles on dielectric characteristics of natural ester. In: 2016 I.E. international conference on high voltage engineering and application (ICHVE), Chengdu, pp 1–3.
  83. 83.
    Du BX, Li XL, Li J, Tao XY (2015) Effects of BN nanoparticles on thermal conductivity and breakdown strength of vegetable oil. In: 2015 I.E. 11th international conference on the properties and applications of dielectric materials (ICPADM), Sydney, pp 476–479.
  84. 84.
    Saenkhumwong W, Suksri A (2015) Investigation on voltage breakdown of natural ester oils based-on ZnO nanofluids. Adv Mater Res 1119:175–178. Scholar
  85. 85.
    Srinivasan M, Ragupathy US, Sindhuja K, Raymon A (2016) Investigation and performance analysis of nanoparticles and antioxidants based natural ester. Int J Adv Eng Technol VII(II):1000–1007Google Scholar
  86. 86.
    Peppas GD, Bakandritsos A, Charalampakos VP, Pyrgioti EC, Tucek J, Zboril R, Gonos IF (2016) Ultrastable natural ester-based nanofluids for high voltage insulation applications. ACS Appl Mater Interfaces 8(38):25202–25209. Scholar
  87. 87.
    Transformer Oil Market Analysis by Product (Mineral, Silicone, Bio-Based), by Application (Small-Scale, Large-Scale Transformers, Utilities), by Region (North America, Europe, APAC, Latin America, MEA), and Segment Forecasts, 2014–2025. Grand View Research (2017)Google Scholar

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • J. E. Contreras
    • 1
    Email author
  • J. Rodríguez-Díaz
    • 1
  • E. A. Rodriguez
    • 2
  1. 1.Prolec GE, Applied Research Center (CIAP)Parque de Investigación e Innovación Tecnológica (PIIT)ApodacaMexico
  2. 2.Faculty of Mechanical and Electrical Engineering (FIME)Autonomous University of Nuevo Leon (UANL)Nuevo LeónMexico

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