• Title/Summary/Keyword: railway distribution system

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A Study on Configuration of Electrical Power Distribution System for Railway (철도 배전 계통의 최적 구성 방안에 대한 연구)

  • Lee, Gyu-Dae;Kim, Kwang-Ho
    • Journal of Industrial Technology
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    • v.31 no.B
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    • pp.17-21
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    • 2011
  • Since the railway passenger services have been recognized as important factor for success in railway, electrical energy consumption in railway station for high quality service has greatly increased. Furthermore, the number of the private railway station has gradually increased. Therefore, the operation conditions for railway power distribution system is dramatically changed in comparison with the past. So, this paper proposes the optimal construction method for railway power distribution system considering economical efficiency and the reliability of power supply to establish the railway power distribution system standard for the future railway industry.

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Improvement Method of Supplying Reliability on the Electric Railway Power Distribution System (전기철도 고압배전시스템의 공급신뢰도 향상 방안 연구)

  • Kim Young-Sun;Chang Sang-Hoon;Kim Wang-Gon
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.682-687
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    • 2005
  • High quality power supplying of power distribution system in electric railway system is the important function. Power feeding system is complicated witch is compose with distribution line, circuit break, protection facilities and so on. Among this components, role of substation is most important for elevation of reliability in electric power system. Therefore, the enhanced reliability considering the preventive inspection, repair work, replacement is necessary. In this study, a proposed the enhanced reliability method through a calculation of fault probability in power feeding system.

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A Study on the Configuration Schemes for Railway Power Distribution System on the basis of power Quality, reliability, and economic aspects (운용성, 경제성에 기초한 철도 배전계통 구성방안)

  • Oh, Kwang-Hae;Kim, Joo-Rak;Lee, Han-Min;Chang, Sang-Hoon
    • Proceedings of the KIEE Conference
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    • 2002.07b
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    • pp.1254-1257
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    • 2002
  • This study presents the configuration schemes for railway power distribution system. The possible alternatives are derived and reviewed on the basis of power quality, reliability, and economic aspects. As a result, a few of configuration schemes are recommended for railway power distribution system

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A Study on the Form of Electric Shock Accident Using Swiss Cheese Model (스위스 치즈 모델을 적용한 철도 감전사고 발생형태에 관한 연구)

  • Yu, Ki-Seong;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.12
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    • pp.1711-1716
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    • 2018
  • Unlike conventional transmission and distribution lines, catenary system for operating electric railway vehicles are composed of multi-conductor groups (feeder line, contact wire, messenger wire, protection wire) and are used for railway employees, public or passengers in the station yards. Electric shock hazards are exposed and electric shocks such as death or serious injury are occurring in electric railway vehicles, railway high-voltage distribution lines, and catenary system. In order to analyze the types of electric shock accidents on railway by systematic approach method, we modeled 'unsafe behavior classification' method using swiss cheese model. Based on this method, we derived the type of electric shock accidents about railway accidents during the last 5 years by analyzing the frequency of occurrence of human errors and unsafe acts, laws and regulations related to violations, and so on.

Quality Analysis for the Data Distribution Service of the Real-time Integrated Railway Safety Monitoring and Control System (실시간 철도안전 통합 감시제어시스템의 데이터 분산 서비스 품질 적합성 분석)

  • Kim, Sang Ahm;Kim, Seon Woo
    • Journal of The Korean Society For Urban Railway
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    • v.6 no.4
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    • pp.351-361
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    • 2018
  • In this paper, we analyse DDS(Data Distribution Service) QoSs(Quality of Services) with experiments, which can control the network transmission quality provided by 'Object Management Group' DDS standard to satisfy the data transmission quality requirements of 'Real-time integrated railway safety monitoring and control system(RIRSMCS)'. 'RIRSMCS' is a system for collecting and analyzing data from various sensors at a railway field to predict and prevent the risk of potential railway accidents. Data transmission quality should be ensured for transmitting the collected data in real-time, accurately and stably for this system. Experimental results show that it is possible to ensure real-time, accurate and stable data transmission for monitoring and control of railway safety using DDS QoS.

Development of Current Distribution Analysis Program for Railway Electrification System (전차선로의 전류분포분석 프로그램 개발)

  • 이욱화;김정훈;홍재승;오광해;창상훈
    • Proceedings of the KSR Conference
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    • 1999.05a
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    • pp.336-343
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    • 1999
  • This paper presents development of the program which calculates the electric quantities such as current, voltage at each pan of railway electrification system in static state. The purpose of this program is to estimate the adequacy of railway electrification system through simulations. And it contributes the estimations for optimal railway electrification system by calculating the maximum of current and voltage. The results are represented through GUI(Graphic User Interface) for user to understand easily.

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Research on Railway Safety Common Data Model and DDS Topic for Real-time Railway Safety Data Transmission

  • Park, Yunjung;Kim, Sang Ahm
    • Journal of the Korea Society of Computer and Information
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    • v.21 no.5
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    • pp.57-64
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    • 2016
  • In this paper, we propose the design of railway safety common data model to provide common transformation method for collecting data from railway facility fields to Real-time railway safety monitoring and control system. This common data model is divided into five abstract sub-models according to the characteristics of data such as 'StateInfoMessage', 'ControlMessage', 'RequestMessage', 'ResponseMessage' and 'ExtendedXXXMessage'. This kind of model structure allows diverse heterogeneous data acquisitions and its common conversion method to DDS (Data Distribution Service) format to share data to the sub-systems of Real-time railway safety monitoring and control system. This paper contains the design of common data model and its DDS Topic expression for DDS communication, and presents two kinds of data transformation case studied for verification of the model design.

Fault Detection Technique in Railway High Voltage Distribution Lines using Wavelet Transform (웨이브렛 변환을 이용한 철도 고압배전선로의 고장검출기법)

  • Jung Ho-Sung;Han Moon-Seob;Lee Chang-Mu;Kim Joorak;Lee Han-Min
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.1274-1279
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    • 2004
  • This paper proposes technique to detect ground fault in railway high voltage distribution lines. Overcurrent relay technique is widely used for detecting one line ground fault that occurs most frequently in railway high voltage distribution lines. However, ground fault in distribution line is usually high impedance fault with arc. Because the fault current magnitude measured in substation is very small, the conventional overcurrent relay can't detect the high impedance ground fault. Therefore this paper proposes the advanced technique using wavelet transform. It extracts D1 component from fault signals and detects fault comparing magnitude of D1 component in each phase. To evaluate this proposed technique, we model distribution system using PSCAD/EMTDC and extract various fault data. In conclusion this technique can detect ground fault including high impedance fault regardless of fault distance, fault impedance etc.

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On the Cost Analysis of Container Physical Distribution System in Pusan Port (부산항 컨테이너 물류 시스템의 비용분석에 관하여)

  • 박창호;이철영
    • Journal of the Korean Institute of Navigation
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    • v.15 no.3
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    • pp.13-24
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    • 1991
  • This paper aims to determining the optimal capacity of Pusan port in view point of Container Physical Distribution cost. It has been established a coast model of the container physical distribution system in Pusan port is composed of 4 sub-systems and in-land transport system. Cargo handling system, transfer & storage system and in-land transport system, and analyzed the cost model of the system. From this analysis, we found that the system had 7 routes including in-land transport by rail or road and coastal transport by feeder ship between Pusan port and cargo owner's door. Though railway transport cost was relatively cheap, but, it was limited to choose railway transport routes due to the introducing of transport cargo allocation practice caused by shortage of railway transport capacity. The physical distribution ost for total import & export container through Pusan port was composed of 4.47% in port entring cost, 12.98% in cargo handling cost, 7.44% in transfer & storage cost and 75.11% in in-land transport cost. Investigation in case of BCTOC verified the results as follows. 1) The optimal level of one time cargo handling was verified 236VAN (377TEU) and annual optimal handling capacity was calculated in 516, 840VAN(826, 944TEU) where berth occupancy is $\rho$=0.6 when regardless of port congestion cost, 2) The optimal level of one time cargo handling was verified 252VAN (403TEU) and annual optimal handling capacity was calculated in 502, 110VAN (803, 376TEU) where berth occupancy is $\rho$=0.58 when considering of port congestion cost.

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Analysis of Transient Characteristic in the Railway High Voltage Distribution Lines Using PSCAD/EMTDC at Method of Protection for One Line Ground Fault (PSCAD/EMTDC를 이용한 철도 고압 배전계통의 과도특성 해석 및 1선 지락사고에 대한 보호방안)

  • Park, Kye-In;Chang, Sang-Hoon;Choi, Chang-Kyu
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.2
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    • pp.51-56
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    • 2008
  • High quality power supplying of high voltage distribution lines electric railway system is the important function, high voltage distribution system is complicated witch is compose with distribution line, circuit break, protection facilities and so on. Among this components, role of substation is most important for elevation of reliability in electric power system. Therefore, the enhanced reliability considering the preventive inspection, repair work replacement is necessary. This paper proposes protection method in railway high voltage distribution lines. we model distribution system using PSCAD/EMTDC(Power System Computer Aided Design/Electro Magnetic Transients DC Analysis Program) and extract various fault data. In conclusion this methods can protection of ground fault.