KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Installation and Test Run of Comprehensive Analysis System for SF6 in Power Equipment

  • Lee, Jeong Eun (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Kim, Kwang Sin (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Kim, Ah Reum (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Park, Seoksoon (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Kim, Kyeongsook (KEPCO Research Institute, Korea Electric Power Corporation)
  • Received : 2017.05.11
  • Accepted : 2017.06.12
  • Published : 2017.06.30
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Abstract

After $SF_6$, which is being used in power equipment as an insulating material, is classified as one of the 6 major greenhouse gases, the maintenance and the refinement of used $SF_6$ started to get attention. In regard to this, KEPCO Research Institute (KEPRI) is developing $SF_6$ recovery and refinement technology starting with establishing a comprehensive $SF_6$ analysis system. With the analysis system, qualitative and quantitative analyses of the purity and the impurities of $SF_6$ before and after recovery, and before and after refinement have been carried out. The analysis system is comprised of GC-DID (Gas Chromatograph -Discharge Ionization Detector) for trace impurities analysis, GC-TCD (Thermal Conductivity Detector) for analyses of $SF_6$ purity and major impurities concentration from several hundred ppm up to percent range, GC-MSD (Mass Selective Detector) for analyses of impurities not included in standard gas, FT-IR (Fourier Transform-Infrared) Spectrometer for analysis of HF and $SO_2$, and moisture analyzer for analysis of moisture below 100 ppm. With this analysis system, complete analysis method of $SF_6$ has been established. This analysis system is being used in the maintenance of power equipment and the development of $SF_6$ recovery and refinement technologies. In this paper, the analysis results of four samples - gas and liquid phase $SF_6$ samples from a $SF_6$ refinement system before and after refinement are presented.

Keywords

References

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