Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Mathematical Modelling of $SF_6$ Puffer Circuit Breakers II : Current Zero Region

$SF_6$ 파퍼차단기의 수학적 모델링 II : 영전류 영역

  • Park, K.Y. (Korea Electrotechnology Research Institute) ;
  • Shin, Y.J. (Korea Electrotechnology Research Institute) ;
  • Chang, K.C. (Korea Electrotechnology Research Institute) ;
  • Song, K.D. (Korea Electrotechnology Research Institute)
  • 박경엽 (한국전기 연구소 개폐 장치 연구팀) ;
  • 신영준 (한국전기 연구소 개폐 장치 연구팀) ;
  • 장기찬 (한국전기 연구소 개폐 장치 연구팀) ;
  • 송기동 (한국전기 연구소 개폐 장치 연구팀)
  • Published : 1994.07.21
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Abstract

In designing $SF_6$ puffer circuit breakers, analyzing are behavior during current zero region and thermal recovery characteristics after current interrupt ion is very important. In this paper, a mathematical are model based on the integral method has been based to analyze them. The pressure rise in the puffer chamber and the distributions of pressure, density, velocity and enthalpy inside nozzle are calculated and analyzed at current zero region. The influence of fault current magnitude and change of di/dt at current zero on the interruption capability of puffer circuit breakers is investigated. Finally, the calculated results are compared with the available results from experiment.

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