• Title/Summary/Keyword: railway test line

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Induced Voltages on Telecommunication Lines Due to AC High-Speed Electrified Railway System (고속전철에 의한 통신 선로에서의 유도전압 분석)

  • Oh, Ho-Seok;Kang, Seong-Yong;Yun, Ju-Young;Kim, Hak-Chul
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.9
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    • pp.983-988
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    • 2009
  • This paper analyzed the induced voltages on a telecommunication line due to high-speed a.c. electrified railway system. The induced voltages were measured by domestic regulation, 2 test lines with 2 km length were installed near railway in parallel to compare the influence for distance from disturbing line. The analysis was made on the induced voltages with the distance from railway, line length, and the different earthing point, and also on the waveform and spectrum distributions. The statistical induced voltages for the time for a day and dates was analyzed.

Experimental Investigation on Fatigue Behavior of Concrete Slab Tracks under Railway Loads (철도하중에 대한 콘크리트 슬래브궤도의 피로거동에 관한 실험적 연구)

  • 강보순
    • Proceedings of the Korea Concrete Institute Conference
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    • 2003.11a
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    • pp.639-642
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    • 2003
  • In this paper, fatigue behavior of concrete slab tracks under railway loads by experimental method is discussed. The addition of steel fibers to concrete mix has been receiving more attention as a way of improving the crack behavior of concrete beams an slabs tacks. This study two objectives: 1) to observe the fatigue behavior of fiber reinforced concrete slab in labor, and 2) to present crack propagation and deflection of fiber reinforced concrete slab track under railway loads in the Waghauser test line. Nine beams, two slabs and one test track were experimentally tested.

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Management and operation of K-AGT test line (한국형경량전철 시험선의 관리 및 운영)

  • Han, Seok-Youn;Jun, Bong-Roong;Lee, Ho-Yong;Lee, An-Ho
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.964-967
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    • 2006
  • Korea Railroad Research Institute (the following 'KRRI') built AGT test line in Gyeong San-city, Kyongsang-bukdo province, Korea on August, 2004. This test line is exclusively used for the test of the driverless rubber-tired AGT system, and applied with research result of AGT System Development Project like vehicles, power supply, control and signaling, track and infrastructure system. The test line is available for the test of rubber tired AGT system's performance, function, safety. In this paper, we described the operation system of test line for the test of performance, safety, reliability, and also system operation in emergency. Finally we present the operation result of test line.

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A Study on the Lateral Acceleration Pattern by the shape of Worn Wheel for the Urban Railway Vehicle (도시철도차량의 차륜마모에 따른 횡가속도 패턴분석)

  • Yang, Chil-Sig;Lim, Won-Sig;Park, Chan-Kyoung
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.66-71
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    • 2006
  • A geometric contact conditions of wheel/rail affect the dynamic behavior of rolling stock. Mechanical force acted on the wheel/rail causes excessive wear and increase the maintenance cost. In this study, we have studied the dynamic behavior of the urban railway vehicle with new and worn wheel by VAMPIRE program. And we have tested the accelerations of wheelset on the conventional line. The results of simulation are compared with the measuring data of field test. It shows that the acceleration of worn wheel is greater than the acceleration of new wheel in the straight track line but on the contrary, the acceleration of new wheel is greater than the acceleration of worn wheel in curved track. That results explain that the new wheel is worn out greater than the worn wheel in curved track line and need to be maintained more seriously when running in curved track line.

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A Study on Verification of PowerRail based on Voltage Drop under Extended Feeding Condition (연장급전 전압강하 계산을 위한 전기철도 급전 시뮬레이터의 검증에 관한 연구)

  • Kim, Joorak
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.2
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    • pp.331-337
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    • 2015
  • The power flow analysis of electrified railway is required complicated calculation, because of variable load. Train runs trough rail supplied by electric power therefore, the load value in electrified railway system fluctuates along time. The power flow algorithm in electrified railway system is different from general power system, and the power flow simulation is peformed by the particular simulation software. Powerail is simulation software for analysis of traction power supply system developed by KRRI, in 2008. This consists of load forecasting module, including TPS and time scheduling, and power flow module. This software was verified by measured current under normal feeding condition, however, has not been verified by voltage on the condition of extended feeding. This paper presents the verification of PowerRail based on voltage drop under extended feeding condition. This is performed by comparing simulation result with field test. Field test and simulation is done in commercial railway line.

Deformation Characteristics of Crushed Rock-Soil Mixtures of Railway Subgrade under Train Cyclic Loadings (암과 흙 혼합재료로 이루어진 철도노반의 열차 반복하중 작용에 의한 변형특성)

  • Kim, Dae-Sang;Park, Seong-Yong;Lee, Yong-Il;Cho, Kook-Hwan
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.955-963
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    • 2008
  • There are lots of tunnel intervals in the KTX II stage construction line for the linearity of railway line passing mountain region. In order to use the rocks from tunnel excavations, railway subgrades are constructed with crushed rock-soil mixtures. In this study, plain strain test using large scale box was conducted in order to analyze the characteristics of deformation behavior of railway subgrades composed of crushed rock-soil mixtures. The effects of variation of degree of saturation, stress level of applied loadings, and number of loading cycles on the resilient and permanent deformation behavior were analyzed. The results show that degree of saturation have a great effect on the deformation behavior of crushed rock-soil mixtures. The axial strain ranges between $0.1{\sim}0.8%$ with variation of degree of saturation, in assumption that deviatoric stress applied on the subgrade by high-speed train load is 55kPa.

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Analysis of the Acceleration Characteristics on the Conventional line for Korean High Speed Train- in il point of passing speed on the curve (한국형 고속전철의 기존선 주행 진동가속도 특성 분석 - 곡선 통과속도 중심으로)

  • 김영국;김석원;목진용;박찬경
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.222-227
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    • 2004
  • Korean High Speed Train(KHST) has been tested on the high speed test line in Osung site, since it was developed through the G7 Project Plan in 2002. It was also tested on the conventional line such as KyongBu and Honan Line to know the possibility of increasing the limited speed for the high speed trains. This paper introduces the method to improve the speed on the conventional line with body lateral acceleration among the several considered issues and explains the parameters related to those analysis, such as the cant deficiency, the radius of curve, speed and etc. When a train pass on the curved track, the lateral accelerations of body are divided into the quasi-static and the maximum accelerations according to the UIC 518 which is the international specification for testing and approval of railway vehicles from the point of view of their dynamic behaviour, especially for safety and ride comfort. This paper shows that it is safe and comfort from the results of test when KHST runs on the conventional line with the curves and proposes that the limited speed of conventional curved line could be changed to a little higher speed if the analysises of other fields are completed.

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A study of the harmonics evaluation in the test track of Korea High Speed Rail (경부고속철도 시험선구 고조파 예측에 관한 연구)

  • 김길상;오광해;권삼영;이태형
    • Proceedings of the KSR Conference
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    • 1998.11a
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    • pp.241-248
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    • 1998
  • The purpose of this study is to evaluate the harmonics generated from Korea High Speed Rail's trainset and to analyze the effect on the KEPCO power system. This study focuses on the test track of the high speed rail and analyzes 154㎸ transmission line, scott transformer, autotransformer and 27,5㎸ line. The trainset is modeled as a harmonic source attached to the catenary line of the test track. Then, harmonic distortion is calculated. This distortion is compared with the KEPCO's regulations in relation to harmonic.

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An Experimental Study on the Correlation between Span Types and the Contact Force of the Pantograph for High-speed Train (경간형식과 고속열차 판토그라프 접촉력 특성의 상호관계에 대한 시험적 고찰)

  • Kim Young-Guk;Mok Jin-Yong;Lee Hi-Sung
    • Journal of the Korean Society for Railway
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    • v.8 no.5
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    • pp.398-404
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    • 2005
  • In this paper, we introduce the on-line test of the current collection characteristics for HSR 350x(Korea High Speed Train project) that have been performed in the Kyoung-bu high-speed line since 2002. Through the analysis of measured data during on-line test, the variation trend of contact force between pantograph and contact wire of catenary according to the span type, the track conditions and driving patterns is reviewed. In order to analyze the variation trend of contact force, we have checked the span type of catenary in KP 24 - 125 out of Kyoung-bu high speed line and obtained the statistical processing result per each span type. This study shows that the track conditions do not affect on the dynamic performance between pantograph and contact wire catenary, and the span type and the driving pattern are important factors in determining the good interaction between them.

An evaluation on 100,000km endurance test for the Korean EMU (표준전동차 10만km 내구도 시험평가)

  • 정종덕;김원경;한석윤;이호용;안태기;한성호
    • Proceedings of the KSR Conference
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    • 2002.05a
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    • pp.336-343
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    • 2002
  • This paper describes the result of endurance test on the Sangju test track. The purpose of the test is to prove the endurance of the Korean EMU for the commercial operation. Test conditions are more severe than actual operation on the commercial line. But endurance test come to an end well without severe problem. Hereafter, Korean EMU will be applied the quality certification of railroad supplies as a testing vehicle and their components will be applied in a new line.

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