Journal of Electrical Engineering and Technology

  • 제11권6호
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  • Pages.1783-1786
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  • 2016
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  • 1975-0102(pISSN)
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  • 2093-7423(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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Investigation of the Supercritical Fluids as an Insulating Medium for High Speed Switching

  • Shon, Chae-Hwa (Power Apparatus Research Center, HVDC Research Division, Korea Electrotechnology Research Institute (KERI)) ;
  • Song, Ki-Dong (Power Apparatus Research Center, HVDC Research Division, Korea Electrotechnology Research Institute (KERI)) ;
  • Oh, Yeon-Ho (Power Apparatus Research Center, HVDC Research Division, Korea Electrotechnology Research Institute (KERI)) ;
  • Oh, Ho-Seok (Power Apparatus Research Center, HVDC Research Division, Korea Electrotechnology Research Institute (KERI))
  • 투고 : 2016.03.03
  • 심사 : 2016.06.08
  • 발행 : 2016.11.01
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초록

The paper investigates the insulation properties of the supercritical $CO_2$ ($SCCO_2$) fluid as an insulating medium for electrical apparatuses. The insulating material is crucial for electrical apparatuses and $SF_6$ gas has been widely used for high power electrical apparatuses. There have been many research efforts to develop substituents for $SF_6$ gas because of high global warming potential. We obtained above 350 kV/mm insulation strength with 12.0 MPa $SCCO_2$. The positive and negative IEC standard pulses are applied between two 10 mm diameter spherical electrodes. The insulation strength of $SCCO_2$ is at least 2.5 times higher than that of $CO_2$ gas at 6.0MPa. The insulation strength of $SCCO_2$ fluid is about 10 times higher than that of $SF_6$ at 0.5MPa which is the ordinary operating pressure of electrical switchgears. Using the result, we expect that the time for switching and dielectric recovery could be reduced using $SCCO_2$ fluid as an insulating medium.

키워드

참고문헌

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피인용 문헌

  1. Review on plasmas in extraordinary media: plasmas in cryogenic conditions and plasmas in supercritical fluids vol.27, pp.2, 2018, https://doi.org/10.1088/1361-6595/aaaa87