Review of Insulation Performance in Synthetic Air and Dry Air for High Voltage Equipment in Distribution Class

배전급 전력설비를 위한 친환경 가스의 절연성능검토

  • Received : 2015.07.15
  • Accepted : 2015.10.14
  • Published : 2015.12.31


This paper examines the insulation performance of synthetic air and dry air. This examination was conducted based on dielectric strength in uniform and non-uniform field, electric field distribution by interior structure and defects in gas insulation switchgear (GIS) and insulation performance in different temperatures. From this review, it was found that eco-insulation gas required to possess low moisture content for power equipment in the distribution class. The results of this paper are valuable to ensure the insulation design and insulation reliability of GIS using air.


  1. T. Rokunohe, Y. Yagihashi, F. Endo, and T. Oomori, "Fundamental Insulation Characteristics of Air, $N_2,\;CO_2,\;N_2/O_2\;and\;SF_6/N_2$ Mixed Gases", Electr. Eng. Jpn., Vol. 155, No. 3, pp. 9-17, 2006.
  2. H. Park, E. -H. Choi, L. -K. Kim and K. -S. Lee, "Surface Discharge Characteristics for Epoxy Resin in Dry-Air with Variations of Electrode Features and Epoxy Resin Size", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 23, No. 2, pp. 154-160, 2009.
  3. Y. Hoshina, M. Sato, M. Shiiki, M. Hanai and E. Kaneko, "Lightning Impulse Breakdown Characteristics of $SF_6$ Alternative Gases for Gas-Insulated Switchgear", IEE Proc.-Sci. Meas. Technol., Vol. 153, No. 1, pp. 1-6, 2006.
  4. X. Zhang, S. Xiao, J. Zhou and J. Tang, "Experimental Analysis of the Feasibility of $CF_3I/CO_2$ Substituting $SF_6$ as Insulation Medium using Needle-Plant Electrodes", IEEE Trans. Dielectr. Electr. Insul., Vol. 21, No. 4, pp. 1895-1900, 2014.
  5. L. Niemeyer, "A Systematic Search for Insulation Gases and Their Environmental Evaluation", Gaseous Dielectrics VIII, pp. 459-464, 1998.
  6. E. -H. Choi, B. -H. Koo, L. -K. Kim and K. -S. Lee, "Assess of Breakdown Characteristics about Environmentally Friendly Gases", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 23, No. 5, pp. 96-100, 2009.
  7. D. -Y. Lim, H. Park, E. -H. Choi, S. -T. Choi and K. -S. Lee, "Surface Discharge Characteristics of Solid Dielectrics in $N_2/O_2$ Mixture Gas for Eco-Friendly Insulation Design", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 26, No. 3, pp. 9-15, 2012.
  8. D. -Y. Lim, G. -J. Min, H. Park, E. -H. Choi, S. -T. Choi, S. Bae, S. -B. Rhee, W. -Z. Park and K. -S. Lee, "Analysis of Medium Effect by Gas Pressure and Gap at Surface Discharge of Dry Air", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 27, No. 10, pp. 86-92, 2013.
  9. G. -J. Min, B. -C. Kang, D. -Y. Lim, K. -S. Lee and W.-Z. Park, "A Study of Surface Discharge Characteristics for Dew-point of Dry-air and Materials or Shapes of Solid Insulator in Quasi-Uniform Field", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 27, No. 6, pp. 44-49, 2013.
  10. E. Kuffel, "Influence of Humidity on the Breakdown Voltage of Sphere-Gaps and Uniform-Field Gaps", IEE Proc. A, Vol. 108, No. 40, pp. 295-301, 1961.
  11. G. R. G. Raju and R. Hackam, "Sparking Potentials of Dry Air, Humid Air and Water Vapour between Concentric Sphere-Hemisphere Electrodes", Proc., IEE, Vol. 120, No. 9, pp. 927-933, 1973.
  12. T. Rokunohe, Y. Yagihashi, K. Aoyagi, T. Oomori, and F. Endo, "Development of $SF_6$-free 72.5 kV GIS", IEEE Trans. Power Deliv., Vol. 22, No. 3, pp. 1869-1876, 2007.
  13. G. -J. Min, S. Bae, B. -C. Kang and W. -Z. Park, "Surface Discharge Characteristics Study on the Laminated Solid Insulator in Quasi-Uniform Electric Field with Dry Air", J. Electr. Eng. Technol., Vol. 10, No. 2, pp. 742-748, 2015.
  14. D. -Y. Lim and S. Bae, "Study on Oxygen/Nitrogen Gas Mixtures for the Surface Insulation Performance in Gas Insulated Switchgear", IEEE Trans. Dielectr. Electr. Insul., Vol. 22, No. 3, pp. 1567-1576, 2015.
  15. R. Arora and W. Mosch, "High Voltage and Electrical Insulation Engineering", a John Wiley&Sons Inc., Publication, pp. 17-19, 71, 2011.
  16. E. -H. Choi, K. -C. Kim and K. -S. Lee, "Breakdown Characteristics of $SF_6$ and Liquefied $SF_6$ at Decreased Temperature", J. Electr. Eng. Technol., Vol. 7, No. 5, pp. 765-771, 2012.
  17. H. Mitsui and R. Kumazawa, "Surface Flashover Characteristics of Ceramic Insulation in Gases at $40^{\circ}C{\sim}700^{\circ}C$", T. IEE Japan, Vol. 117-A, No. 8, pp. 832-838, 1997.
  18. H. Fujita and T. Kouno,"The Breakdown Voltages of $N_2-O_2$ Gas Mixtures in Non-Uniform Field at Low Temperatures", J. Phys. D: Appl. Phys., Vol. 11, pp. 2233-2241, 1978.
  19. T. Nitta, Y. Shibuya, Y. Fujiwara, Y. Arahata, H. Takahashi and H. Kuwahara, "Factors Controlling Surface Flashover in $SF_6$ Gas Insulated Systems", IEEE Trans. Power Syst., Vol. 97, No. 3, pp. 959-968, 1978.
  20. K. Itaka, T. Hara, T. Misaki and H. Tsuboi, "Improved Structure Avoiding Local Field Intensification on Spacers in $SF_6$ Gas", IEEE Trans. Power Apparatus and System, Vol. PAS-102, No. 1, pp. 250-255, 1983.
  21. H. C. Miller, "Surface Flashover of Insulators", IEEE Trans. Electr. Insul., Vol. 24, No. 5, pp. 765-786, 1989.
  22. H. H. Lee, "A Study Breakdown Mechanism and Improvement of Dielectric Performance under Particle-contaminated Conditions in $SF_6$ Gas", Ph. D. Thesis, Kyushu University, pp. 36-41, 1992.
  23. N. L. Allen, "Corona, Breakdown and Humidity in the Rod-Plane Gap", IEE Proc. A, Vol. 133, No. 8, pp. 562-568, 1986.
  24. J. -H. Seok, J. -H. Beak, D. -Y. Lim, S. Bae, K. -C. Kim and W. -Z. Park, "A Study on Characteristics of Insulation Breakdown and Surface Discharge by the Mixing Ratio of Dry Air/$O_2$ gas mixtures", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 29, No. 6, pp. 49-57, 2015.
  25. D. -Y. Lim, E. -H. Choi, S. -T. Choi, B. -J. Choi, K. -S. Lee and S. Bae, "Surface Flashover Characteristics on Poor Contact in $N_2/O_2$ Mixture Gas under Non-Uniform Field", J Korean Inst. IIIum. Electr. Install. Eng., Vol. 29, No. 8, pp. 63-69, 2015.