Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Study of an Optimal Control Algorithm for Train Interval Under Disturbance

외란을 고려한 열차간격 최적제어 알고리즘 연구

  • Kim, Kiwoong (Department of Operation Control Center, Seoul Line9 Operation Co. Ltd.) ;
  • Lee, Jongwoo (Department of Railroad Electrical and Signaling Engineering, Graduate School of Railroad, Seoul National University of Science and Technology) ;
  • Park, Minkee (Department of Electronic and IT Media Engineering, Seoul National University of Science and Technology)
  • Received : 2014.11.26
  • Accepted : 2015.07.13
  • Published : 2015.10.31
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Abstract

When a train is delayed because of a disturbance, the time interval between successive trains increases and high-frequency metro lines can become unstable. Time interval control is therefore necessary in preventing such instabilities. In this paper, we propose an optimal interval control algorithm that is easy-to-implement and that guarantees system stability. In the proposed method, the controlled trains are determined from the time interval deviations between successive trains; the control algorithm for staying time is designed by use of a discrete traffic model to ensure an optimal time interval between successive trains. The results of a computer simulation are also given to demonstrate the validity of the proposed algorithm.

도시철도 운행시스템에서 외란에 의해 지연이 발생하면 열차 사이에 간격편차가 발생하고 열차운행 상황이 불안정해진다. 따라서 이러한 불안정한 열차운행을 방지하기 위해서는 열차간격을 적절하게 제어하는 것이 필요하다. 본 논문에서는 상용 도시철도 운행시스템에서 외란에 의해 지연이 발생하는 경우에 안정한 운행을 위하여 간단하면서 효과적으로 적용할 수 있는 열차간격 최적제어 알고리즘을 제안한다. 제안한 알고리즘은 실시간 열차간격 편차의 크기에 따라 제어 대상열차를 결정하고 이산 열차간격 모델을 이용하여 대상열차의 정차시간을 조절함으로써 모든 열차가 적정 운행간격을 유지하도록 제어한다. 또한 시뮬레이션을 통하여 제안한 방법의 유효성을 확인한다.

Keywords

References

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  1. Traffic regulation algorithm for metro lines with time interval deviations vol.31, pp.2, 2016, https://doi.org/10.3233/JIFS-169029