Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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The Lightning Impulse Properties and Breakdown Voltage of Natural Ester Fluids Near the Pour Point

  • Received : 2011.09.30
  • Accepted : 2012.12.14
  • Published : 2013.05.01
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Abstract

Recently, researchers have become interested in natural ester fluids, as they are an environmentally friendly alternative to mineral oils. Natural ester fluids are a natural resource made from plants; they have higher biodegradability, flash, and fire points, and a greater permittivity compared to conventional mineral oils. However, natural ester fluids also have a higher pour point, viscosity, and water content. These characteristics can hamper circulation and impair the electrical properties of an oil-filled transformer. A large amount of data has been accumulated over the years in regards to mineral insulating oil involving dielectric breakdown voltage and lightning impulse tests. However, natural ester fluids have not had their electrical properties sufficiently characterized. In this paper, we present an investigation into the characteristics of the electrical discharge development in natural ester fluids and in an oil-filled transformer near the pour points. The experiment results show that the electrical properties decreased according to a decrease in the ambient temperature and freezing time. It was found that the pour point and water content of natural ester fluids have a significant effect on the electrical properties.

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References

  1. K. J. Rapp, G.A. Gauger and J. Luksich, "Behavior of ester dielectric fluids near the pour point", 1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, pp. 459-462, 1999.
  2. Md. Amanullah, S. M. Islam, S. Chami and G. Ienco, "Analyses of Electro-Chemical Characteristics of Vegetable oils as an Alternative Source to Mineral Oil-based Dielectric Fluid", ICDL, pp. 365-368, 2005.
  3. E. A. Al-Ammar and M. I. Qureshi, "Probing the Use of Green Insulating Oils in Transformer Based on their Statistical Breakdown Data", EPECS, pp. 1-6, 2009.
  4. C. P. Mcshane, "Vegetable-Oil-Based Dielectric Coolants", IEEE Industry Applications Magazine, Vol. 8, Issue. 3, pp. 34-41, 2002.
  5. D. J. Kweon, K. S. Koo, J. W. Woo and Y. S. Kim, "Hot Spot temperature for 154kV transformer filled with mineral oil and natural ester fluid", IEEE Transaction on Dielectric and Electrical Insulation, Vol. 19, No. 3, pp. 1013-1020, 2012. https://doi.org/10.1109/TDEI.2012.6215107
  6. A. Darwin, C. Perrier and P. Folliot, "THE USE OF NATURAL ESTER FLUIDS IN TRANSFORMERS", Matpost, 2007.
  7. Md. Amanullah, 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" ICDL, pp. 397-400.2005.
  8. A. A. Abdelmalik, J. C. Fothergill, S. J. Dodd and A. P. Abott, "Effect of side chains on the dielectric properties of alkyl esters derived from palm kernel oil", ICDL, PP. 1-4, 2011.
  9. ASTM D1816, "Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using VDE Electrodes", 2012.
  10. KS C IEC 60156, "Insulating liquids - Determination of the breakdown voltage at power frequency - Test method", 2003.
  11. IEC 60076-4, "Power transformer - Part 4:Guide to the lightning impulse and switching impulse testing - Power transformers and reactors", 2002.
  12. ASTM D3300, "Standard Test Method for Dielectric Breakdown Voltage of Insulating Oils of Petroleum Origin Under Impulse Conditions", 2012.
  13. ASTM D6871, "Standard Specification for Natural (Vegetable Oil) Ester Fluids Used in Electrical Apparatus", 2008.
  14. Environmental Technology Verification Report, "Cooper power system Envirotemp FR3 Vegetable Oil-Based Insulating Dielectric Fluid" 2002.
  15. Cooper Power System, "Environment FR3 Fluid Testing Guide", 2004.
  16. C. P. McShane. G. A. Gauger and J. Luksich, "Fire resistant natural ester dielectric fluid and novel insulation system for its use", IEEE Transmission and Distribution Conference, pp. 890-894, 1999.
  17. IEC 60060-2, "High-voltage test techniques - Part 2 : Measuring systems", 2010.
  18. Herbert G. Erdman, "Electrical Insulating Oils", ASTM, 1988

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