The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Performance verification on the Impedance Relay Method using Failure Simulator of AT Feeding System

AT 급전계통 고장 모의시험장치를 활용한 임피던스 계전방식의 성능검증

  • Kim, Wan-il (Dept. of Transportation System Engineering, Korea National University of Transportation) ;
  • Lee, Kye-Seung (Dept. of Railway Vehicle & Operation System Engineering, Korea National University of Transportation) ;
  • Jung, No-Geon (Dept. of Railway Vehicle & Operation System Engineering, Korea National University of Transportation) ;
  • Kim, Jae-Moon (Dept. of Transportation System Engineering, Graduate School of Transportation, Korea National University of Transportation)
  • Received : 2018.01.05
  • Accepted : 2018.01.25
  • Published : 2018.02.01
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Abstract

In this paper, we investigated the impedance method for searching fault detection point in case of an accident in the AC electric railway AT feeding system. For this purpose, simulation circuit modeling and prototype hardware are made based on the known numerical analysis. As a result of simulation modeling of the feeding system based on the numerical analysis of the impedance method confirmed that the modeling was properly implemented with an average error rate of 0.07%. Also, as a result of fault event by hardware simulator, it was confirmed that the breaker operation time is shortened and the fault current is decreased while the voltage is close to the supply voltage in the transient state as the point of the fault accident moves away from the substation(SS).

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References

  1. W. I. Kim, K. S. Lee, C. Y. Chang, K. W. Koo, J. M. Kim, "A Study on the Impedance Fault Location Method Using AT Feeding System Simulator", Korean Institute of Electrical Engineers Conference, 2017.
  2. Dong-Sik Son, "A study on Auto Transformer protective method for AC electric railway system", Master's degree paper, 2014.
  3. Min-Joo Jang, "A Study on Improvement Methodology of Fault Location Scheme in AC Electric Railway", Doctor's degree paper, 2016.
  4. H. Lee, N.G. Jung, W. I. Kim, Y. S. Kim, J. M. Kim, "Comparative Analysis on the Characteristic according to Fault Location Estimation Technique in AT Feeding System", Korean Institute of Electrical Engineers Conference, 2016.
  5. No-Geon Jung, Ki-Sik Lee, "The New Approach of the Impedance Calculation Method of Fault Current Analysis in the AT Feeding Method of the Electric Railway", Journal of Electrical Engineering & Technology Vol. 11 No. 5, pp. 1519-1525, September, 2016. https://doi.org/10.5370/JEET.2016.11.5.1519