• Title/Summary/Keyword: Electric railway system

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Analysis of Tram Feeding System according to Train Diagram Change (열차운행 시격 변경에 따른 트램 급전계통 해석)

  • Kim, Dong-Man;Chang, Chin-Young;Kim, Jae-Moon;Kim, Yang-Su
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.4
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    • pp.634-639
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    • 2015
  • In order to understand phenomenon of the electric railway power feeding system in the construction planning step, analysis of the overall system including electric characteristic of electric railway power feeding system, train running characteristic and power consumption pattern and train operation plan and gradients of railroad and curve radius is required. This paper study the feeder system by analysis of comprehensive system according to train operation plans, line impedance, running characteristic of train, electrical properties of the feeder system. In order to understand phenomenon to the feeder system of tram exactly regarding export of the field railroad preceeding actively recently.

Study on Analysis for Power Consumption and Charge/Discharge Effect with BESS in AC High-Speed Electric Railway System (교류 고속철도계통에서 BESS의 도입을 위한 전력소비 및 충·방전효과 분석에 관한 연구)

  • Jeon, Yong-Joo;Kang, Byoung-Wook;Chai, Hui-Seok;Kim, Jae-Chul
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.28 no.9
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    • pp.20-27
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    • 2014
  • The power consumption pattern of high-speed railway has rarely during night time. But, during service time, the power is consumed irregularly related to train operation. Especially certain unusual about 1-2 days of service time interval to indicate the power consumption is rapidly growing phenomenon, which causes the capacity of the power contract is the annual electricity bill to rise rapidly as the cause. Normally, amount of peak power consumption bill rate at railway substation is over 20% of total electrical bill. Therefore, high-speed railway substation is expected to be considerably larger savings by reducing the peak power of the default charge(demand power).

A Study on Performance Characteristic of Electric Equipments for High Speed Train by on-Line Test (시운전시험을 통한 고속전철 전장품의 성능 특성)

  • Han Young-Jae;Kim Seog-Won;Kim Gi-Hwan;Han Seong-Ho;Lee Su-Gil;Kim Jong-Young;Kno Ae-Suk
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.1404-1407
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    • 2004
  • An electric railway system is composed of high-tech subsystems, among which main electric equipments such as transformers, converter and traction motors are critical components determining the performance of rolling stock. We developed a measurement system for on-line test and evaluation of performances of Korean High Speed Train. The measurement system is composed of software part and hardware part. Perfect interface between multi-users is possible. A new method to measure temperature was applied to the measurement system. By using the system, measurement and evaluation for the performance of electric equipments in Korean High Speed Train was conducted during test running.

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Measurement and Analysis Energy Consumption of Tilting Train Express (한국형 틸팅열차의 소비전력 측정 및 분석)

  • Huh, Jae-Sun;Kang, Chul;Lim, Jae-Chan;Kim, Jae-Chul;Lee, Su-Gil;Han, Seoung-Ho;Lee, Eun-Kyu
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.157_158
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    • 2009
  • Recently, the growth of electric railway technology steadily keep up in the korea, and occupancy rate of electric railway system increased as a transportation method so energy consumption of railway system is increasing. According to this reason, the many studys of energy consumption in the railway system are in progress. In this context, the TTX(Tilting Train eXpress) needs to measure and analyze energy consumption and regenerative energy. In this paper, because of driving of TTX in the Ho-Nam railroad and Jung-Ang railroad, consumpted and regenerated energy are measured. This measured data is classified and analyzed as driving mode.

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The Feasibility Study on Small-scale Prototype Electric Railway Vehicle Application using Fuel Cell Generation System (연료전지 발전시스템을 이용한 축소형 철도차량 적용 선행연구)

  • Jung, No-Geon;Chang, Chin-Young;Chang, Sang-Hoon;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.1
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    • pp.184-190
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    • 2014
  • Fuel cell power system, unlike conventional energy sources, converts chemical energy into electrical energy through electrochemical reaction of hydrogen and oxygen. In recent years, railway field as well as mobile fuel cell power system is being studying actively with development of hydrogen storage technologies. This paper presents the feasibility study on small-scale prototype electric railway vehicle application using fuel cell generation system. it is confirmed that proposed fuelcell-battery hybrid system shows good response characteristic about speed and torque based on design of parameter on system. Also as results of response for proposed system modeling, it show that powering mode and braking mode of system is controlled by switching devices of converters.

Investigation of contactless power transfer system for electric railway (전기철도용 무접촉 급전방식일 환한 기초검토)

  • Lee, Byeong-Song;Bae, Chang-Han
    • Proceedings of the KIEE Conference
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    • 2003.10b
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    • pp.272-274
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    • 2003
  • This paper investigates contactless power transfer system for electric railway which makes use of electromagnetic induction among the coils. The transmission line efficiency and the quality factor are introduced to analyze the performance of the contactless power transfer system. Several instances of the mobile loads using contactless power transmission are described to understand practical usefulness.

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The analysis of power quality characteristics in high speed train through neutral section of catenary system (절연구간운행 고속철도차량 전력품질 특성 분석)

  • Hong, Hyun-Pyo;Choi, Eui-Seong;Lee, See-Bin;Lee, Hee-Soon
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.634-643
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    • 2011
  • The neutral section was installed in order to prevent conflict with different phase angle source in electric railway catenary system. The speed of electric train reduced due to coasting operation by notch off when it passed the neutral section. And, the catenary wire was damaged and the accident might be happened because of the arc generation when the electric train passed the neutral section with notch off condition. The inrush current of main transformer installed tiling train is analyzed during the operation of MCB(main circuit break) passing through the neutral section. The instantaneous waveform of load current were analyzed in case of powering and regenerative braking. Inrush current waveform with run of AC railway train showed that inrush current waveform and harmonics, the inrush current generated from main transformer in train has bad effects on power quality problem. In order to reduce these inrush currents, the MCB is connected when the phase angle of voltage is 90 degree. This paper is to measure inrush current and harmonics in main transformer of high speed train in neutral section of electric railway. This measurement report is used to control minimum inrush current in algorithm and power phase angle.

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Safety Analysis and Safety Measures of 22900/1200V Oil Immersed Transformer at Power Supply System (전철 급전시스템의 22900/1200V 유입변압기 안전성 분석)

  • Lee, Jong-Su;Lee, Jongwoo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.9
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    • pp.1335-1342
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    • 2013
  • Subway is electrified railway system nowadays, in which liquid dielectric transformers have been widely used, though mold type transformers are replacing it. The transformers supplies large electric power and have innate hazards causing accidents under operation. A number of researcher have carried out on failures of it and have oriented to identify transformer's failure causes and how to maintain it healthy state. The transformer failures can cause serious accidents which can provoke economic loss and leads persons to kill. In this paper, we carried out a safety activity to reveal hazards and to estimate risk of subway liquid dielectric transformers using FMEA, HAZOP and What-if methods. In case of installing safety devices in oil immersed transformer, we tried to evaluate an effect on a subsystem's failure rate. We proposed how to design subsystem failure rate and safety device failure rates.