• 제목/요약/키워드: Electric railway system

검색결과 773건 처리시간 0.022초

고속철도시스템에서 낙뢰로 인해 전차선에 유도되는 서지전압의 해석 (Analysis on Induced Surge Voltage of Electric Car Line affected by Lightning in Rapid-Transit Railway System)

  • 이성근;이건아;고광철
    • 조명전기설비학회논문지
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    • 제29권5호
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    • pp.65-70
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    • 2015
  • Lightning is one of hazards affecting the rapid-transit railway system. There are two effects, which are direct lightning surge to electric car line and induced lightning surge. Protection methods for the direct lightning surge are studied with various occasions, however, study of induced lightning surge is insufficient in spite of a large or small effects. In this paper, it is analysed the way that serge voltage is induced to electric car line by lightning strikes. By modeling the propagation process and the coupling phenomenon of electromagnetic wave produced by lightning strikes, it is achieved to make integrative circuit model combined with existing electric car model. The study is conducted into three different waveform of electromagnetic wave produced by lightning; rectangular wave, double exponential distribution wave, triangle wave. It is also simulated that the inducing serge is coupled to electric car line in an arbitrary location. The simulation results in that, when rapidly changing rectangular wave is supplied, maximum power is induced to electric car line.

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

  • 이욱화;김정훈;홍재승;오광해;창상훈
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 1999년도 춘계학술대회 논문집
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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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고속철도 전차선로 드로퍼 클램프 내구성 기준 정립에 관한 연구 (A Study on Durability Standard Specification of the Dropper Clamp of Catenary for High Speed Railway)

  • 오완식;양인동;박병곤;홍석진;김성철
    • 전기학회논문지
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    • 제66권9호
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    • pp.1431-1436
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    • 2017
  • The high-speed railway of catenary system, supplies a stable electric power supply to the train by satisfying the special conditions between pantograph and trolley wire, which operates more than 250km/h mutually sliding and feeding electric lines. According to Korean Railway Standard KRS PW 0026-13 (R), the standard for the grip strength of the dropper clamp in conventional line is established, but the high-speed railway line is not yet. When the grip strength of the dropper clamp is detached from the catenary line of the high-speed railway line, various problems may occur, such as damage to the pantograph due to the collision and arcing. In this paper, it is expected to be used as a basic data for establishing the durability criteria of the high-speed railway dropper clamp by verifying the dropper clamp on the Gyeong-bu and Honam high-speed line.

서울메트로 접지설비 표준화 방안 연구 (A Study on the Unification of the Grounding System of SeoulMetro)

  • 김균식;박한용;백유호
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2007년도 춘계학술대회 논문집
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    • pp.1027-1036
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    • 2007
  • Since the opening of the Seoul Metro in 1974, the electric railway passengers have been increased rapidly and as the advanced equipments(OC,PSD) were introduced, additional power facilities were built in a limited area for the comfortable transportation environment. Present grounding system were built according to old Electric equipment standards and all the electric signal, communication and electronic equipments were built only for the purposes of protecting building structure, people and electronic equipments. Grounding system which was additionally built in the limited area caused problems with the building structure and it caused secondary damages when earth fault happens. One of the problems is grounding system of the building structure; grounding system does not work properly since grounding equipments are not separated from each other. So, existing grounding system needs to be improved and unified grounding system in the building should be established. The purposed of this study is to analyze all the grounding systems that had been built in different year and to establish unified grounding system of Seoul Metro.

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전기철도 전력시설 진단용 원격진단시스템 구축을 위한 네트워크 설계 (Network Design for Construction of Remote Diagnosis System for Power Facilities of Electric Railway)

  • 김재문;김양수
    • 전기학회논문지P
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    • 제58권4호
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    • pp.432-436
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    • 2009
  • This paper is described that advanced study on network design of remote diagnosis system for power facilities of electric railway. In the field, it is very difficult for worker to diagnosis power facilities including catenary because workers should be maintenance on AC power supply. Therefore, to properly design on remote diagnosis system, we have searched the inside and outside of the country-related technology trends. Also we confirmed that required technologies to design interface technology required for the development of sensor devices and the USN network was designed in accordance with required skills. Throughout variety of requirements, we have development iRFS based ZA sensors and iRFM to receive data of sensor. Also CC2420 is applied as single-chip which used 2.4GHz IEEE802.15.4 compliant RF tranciver designed for low-power and low-voltage wireless applications for ZigBee communication.

전철시스템의 에너지절약 회생인버터시스템 개발 현황 (Development Status of the Regeneration Inverter System for Energy Saving in DC Electric Railway)

  • 김용기;한문섭;양영철;장수진
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2007년도 추계학술대회 논문집
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    • pp.1473-1478
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    • 2007
  • In the respect of energy saving and reusing, it is necessary to reduce greenhouse gases emission and to enhance the operation efficiency in electric railway system. Recently, as the power electronics technologies are advanced, some countries have focused on the regenerative inverter to use regeneration energy on each line. When the electric tractions are stopped or slowed down, it is useful to supply the surplus energy to the power source by regenerative system, which increases its energy efficiency. Also, the generated energy can be supply to other tractions or equipments inside traction. Thus, it may help reduce construction cost of additional power plants. The purpose of this study is to describe the development status of the regenerative inverter system which suppress extra DC-line voltage and regenerate the energy instead of using a resister.

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실시간 계측시스템을 이용한 전차선로 특성 측정 (Characteristic Measurement by a Real-time Data Acquisition System in Overhead Contact Wire)

  • 나해경;박영;조용현;이기원;박현준;오수영;송준태
    • 한국전기전자재료학회논문지
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    • 제20권3호
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    • pp.281-285
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    • 2007
  • Facilities of electric railway should be maintained only at night and it is necessary to maintain by human power because facilities are installed at a high place. This paper presents the development and application of a real-time data acquisition system for the characteristics measurement of overhead contact wires in electric railway. The system is designed to perform in the telemetry environments that developed to store data by wireless in a live wire state of 25 kV power source. The field test results show that the proposed technique and the developed system can be practically applied to measure characteristics of temperature, displacement, and strain on overhead contact lines.

전기철도에서의 고조파 발생과 계통응답특성(I) - 계통응답특성을 중심으로 - (Harmonic Generation and System Response Characteristics in Electrified Railway(I) - Focused on System Response Characteristics -)

  • 오광해;이장무
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2003년도 춘계학술대회 논문집
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    • pp.493-498
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    • 2003
  • Harmonic current originating from electric locomotives can be magnified due to the impedance characteristics of power supply circuit and bring about various problems. That is, electromagnetic interference with communication lines, operational trouble in signaling, overheat and/or vibration in power capacitor, mis-operation in protection relay and so on. Therefore, the exact assessment of the harmonic current flow must be undertaken at design and planning stage for the electric traction systems. For these reasons, this study propose a new approach to model and to analyse traction power feeding system focused on system response to current and voltage harmonic(PART I ). Measurements of harmonics are also performed for railway power supply systems under normal operation. Spectrum and distortion analyses in measurement data are variously described in PART II

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IEC 61508에 의한 열차제어장치용 PES 구성에 관한 연구 (IEC 61508 into PES for Train Control Systems)

  • 강신주;이종우
    • 전기학회논문지
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    • 제62권8호
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    • pp.1169-1176
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    • 2013
  • PES have been recently required to implement railway industry for its application flexibility. The PES should be commensurated with railway safety requirements. It achieved its safety through redundant PES. The redundant systems run with voting functions. The successful major voting result becomes the output of the redundant system. The redundant system have to be synchronized to vote each output results. This paper proposed an algorithm for synchronizing and a voter. The proposed algorithm and the voter are verified using simulation.

직류철도 급전계통의 안전성 향상을 위한 차단기 동작 최적 설정의 실험적 고찰 (An Experimental Study on Operation Setting Optimization of Circuit Breaker for Improving Safety on DC Railroad Feeder System)

  • 이재봉;정노건;김재문
    • 전기학회논문지
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    • 제65권3호
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    • pp.526-531
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    • 2016
  • This paper presents an experimental study on the optimal settings for the selected DC fault relay (50F) to improve the operating performance for the high-speed circuit breaker on DC feeding system which ensure safety within rolling stock maintenance depot. In this study, current supplied to overhead contact wire was calculated on 1 ms interval to analyze the correction values of DC fault selective relay for the operation of current supply cutout. Particularly, standards for the accurate detection of accidents between an electric railway vehicle and the electric power facilities are shown by investigating the optimal correction values for detection of fault current, and the results indicated that it takes about 213 ms for the DC fault selective relay(50F) to fully open. In the future, the correction values of DC fault selective relay suggested in this paper will be used as the reference values of protective relay for the safe operation of DC electric railroad system such as urban railway.