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Approximate Model for Peak Demand Power Computation in Metro Railway with DC Rectifiers

DC정류기를 갖는 도시철도의 최대수요전력 산출 근사모델

  • Kim, Han-Su (Department of Electrical Engineering, INHA University) ;
  • Kwon, Oh-Kyu (Department of Electrical Engineering, INHA University)
  • Received : 2013.05.09
  • Accepted : 2013.08.05
  • Published : 2013.10.31

Abstract

This paper presents an approximate model for computing the peak demand power in a metro railway system. The peak demand of substations can be calculated using the current vector iteration method. But the existing method requires many repeated calculations to determine the peak demand power, which makes it difficult to apply to the real-time peak power control problem. In this paper, we assume that none of the conditions vary except source impedance and make an approximate model for rapid calculation based on changes in the impedance of the power substation. The proposed model result is approximately the same as the existing model, which is demonstrated through simulation.

이 논문에서는 도시철도의 최대수요전력 산출을 위한 근사모델을 제시한다. 전류 벡터 반복법을 활용하여 변전소의 최대수요전력을 계산할 경우에 기존의 방법으로는 수 많은 반복 조류계산이 필요하기 때문에 계산시간 제약으로 인해 실시간 적용이 어렵다는 문제가 있다. 본 논문에서는 모든 조건이 동일한 상태에서 전원 임피던스의 변화에 따른 변전소 최대수요 전력을 빠르게 산출하는 근사모델을 제시한다. 제시된 근사 모델에 의한 산출결과가 기존 모델과 거의 유사한 정확성을 보임을 시뮬레이션을 통해 예시한다.

Keywords

References

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Cited by

  1. Peak Power Optimization for Metro Railway using by Source Impedance Control vol.63, pp.6, 2014, https://doi.org/10.5370/KIEE.2014.63.6.841