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Study of Electric Charge Saving Plan Using High-speed Charging Wireless Railway System

급속충전방식 무가선 전동차 시스템을 이용한 전기요금 절감 방안 연구

  • Go, Hyo-Sang (Propulsion System Research Team, Korea Railroad Research Institute) ;
  • Cho, In-Ho (Propulsion System Research Team, Korea Railroad Research Institute) ;
  • Ryu, Joon-Hyoung (Propulsion System Research Team, Korea Railroad Research Institute) ;
  • Kim, Gil-Dong (Propulsion System Research Team, Korea Railroad Research Institute)
  • Received : 2016.11.22
  • Accepted : 2016.12.06
  • Published : 2017.02.28

Abstract

Many studies have been performed to reduce electric consumption in railway systems. Due to its low conduction loss and high regenerative braking efficiency characteristics, the ESS powered railway system is chosen as a promising candidate for future railway systems. This paper introduces the ESS powered railway system and analyzes current power charge calculation methods that have been set up by KEPCO (Korea Electric Power Corporation). Based on the analysis, this paper proposes two different power charge reduction methods for the railway system. One is to smooth the peaks of traction energy consumption by supplying additional energy to the grid. The other is to save electric charge by reducing electric energy consumed by the railway during the energy peak time, 2 p.m.~5 p.m., which has highest 'Won/kWh' rates. To verify the effectiveness of the proposed method, the power charge of Seoul Metro Line 2 is recalculated using the method.

철도 시스템의 전력 소비를 줄이기 위한 많은 연구가 진행되고 있다. 그 중에서 급속충전방식 무가선 전동차 시스템은 철도 분야에서 매우 효율적인 에너지 절감 기술로 주목 받고 있다. 본 논문에서는 ESS를 이용한 급속충전 무가선 전동차 시스템을 소개하고 현재의 도시철도 전기요금 산정방식에 대하여 분석하였다. 이러한 분석을 바탕으로 급속 충전 무가선 전동차 시스템 적용 가능한 두 가지 전기요금 저감 방안(기본요금을 저감하는 방식(Case 1)과 전력량요금을 저감시키는 방식(Case 2))을 제안하였다. 제한하는 방식의 타당성 확인을 위해 현재 운영 중인 전동차 시스템(도시철도 2호선)의 전기요금과 비교하여 비용 경제성을 평가하였다.

Keywords

References

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Cited by

  1. Reduction of Electricity Prices Using the Train to Grid (T2G) System in Urban Railway vol.11, pp.3, 2018, https://doi.org/10.3390/en11030501