• Title/Summary/Keyword: 전차선로

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A simulation study on predicting current collection performance with respect to the contact wire tension in 400km/h test run of the next high speed train HEMU-400X (차세대 고속철도 최고속도 시험에서 전차선 장력 증가 단계별 집전 성능 예측 시뮬레이션)

  • Kwon, Sam-Young;Park, Chun-Soo;An, Seung-Hwa
    • Proceedings of the KSR Conference
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    • 2009.05b
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    • pp.201-206
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    • 2009
  • In the testing stage of HEMU-400X(next Korean high speed train) developing project, maximum speed(400km/h) tests will be conducted. On present and near future conditions of the overhead contact lines, 400km/h is over the design speed criteria. The predictions of current collection performance including the percentage loss of contact(arcs level) parameter through dynamic interaction simulation of HEMU-400X maximum speed test run are described in this paper. Various simulations are conducted at the condition of two different contact wire tensions to draw the proper contact wire increasing values in the 400km/h test line under the available contact wire tension supporting condition of that line.

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Strain monitoring of overhead contact line with FBG sensors (FBG 센서를 활용한 가공 전차선의 스트레인 모니터링)

  • Choi, Won-Seok;Ko, Ki-Han;Lee, Kyung-Bok;Park, Young;Cho, Yong-Hyeon
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.1227-1230
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    • 2008
  • This paper reports on measurement method for the fiber optic strain monitoring of overhead contact line systems of trains. We used fiber Bragg grating (FBG) sensors to measure the strain variation of overhead contact line. FBG sensors were attached on the contact line and connected to the monitering system with optical fibers. The monitering system with FBG sensors showed very good sensitivity to measuring strain variation and this system could be applied to the overhead contact line of KTX.

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A Study on the Application of UPQC in AC Railway System (교류철도급전계통에 전력품질보상장치 적용에 관한 연구)

  • Choi, Joon-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.18 no.6
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    • pp.220-229
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    • 2004
  • The AC railway system is quite differing from the general electric power system because it is single- phase and intermittently heavy loads. Thus, inevitably power quality problems are occurred in the AC railway system, i.e. voltage regulation voltage sags, voltage imbalance, and harmonic distortion. Recently, the power quality of the AC railway system becoming a hot issue because it is affect the control and safety of high-speed traction. In addition it is also affect the power quality of the electric power system. In this paper, single-phase Unified Power Quality Conditioner(UPQS) for the AC railway system is proposed to compensate the voltage sags and harmonic distortion. The configurations and control schemes of the proposed single-phase UPQC are presented. The effectiveness of the proposed single-phase UPQC application is verified by the PSCAD/EMTDC simulation works. It can be shown that the application of UPQC in the AC railway system is very useful to compensate the voltage sags and harmonic distortion from the results of related simulation works.

Characteristics of Curved Track Behaviors according to Traveling Tilting Train (틸팅차량 주행에 따른 기존선 곡선 궤도의 거동 특성)

  • Park, Yong-Gul;Choi, Jung-Youl;Sung, Deok-Yong;Chun, Dae-Sung
    • Journal of the Korean Society for Railway
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    • v.10 no.6
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    • pp.692-700
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    • 2007
  • A trial run of locally-developed tilting train has been in process on Chungbuk line since the test vehicle was first produced. For the system stabilization, interface verification among the systems including track, structure, catenary and signaling system, not to mention the rolling stock, is very crucial. In the area of wayside structure, the stability of track structure and train run shall be evaluated through the review of impact by increased speed by developed train on track structure. The study thus was intended to evaluate the impact on track while a tilting train is running the curve section, which is vulnerable to accelerated train speed. The analysis of tilting train test running the part of Chungbuk line and Honam line was conducted to identify the impact on existing track performance by tilting train. To identify the movement behavior of each part of track while tilting train, high speed train and traditional train (Mugunghwa and freight train) were running the existing line, wheel load, lateral wheel load, rail bending stress, vertical and lateral displacement of rail and vertical displacement of sleeper were compared and analyzed so as to evaluate the expected impact by tilting train for improving the train speed.

Effects of Coupling Resistor Resistance Discrepancy from Characteristic Impedance on Discriminating Characteristics of Super Wide-Band FM Line Discriminator (전송선형 초광대역 FM변별기에서 결합 저항기의 오차가 미치는 영향)

  • 이충웅
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.7 no.4
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    • pp.1-5
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    • 1970
  • This presents the way in shich the input impedance, and the output waveform of the line discriminator are influenced by a discrepancy of less than $\pm$10% in the coupling resistor resistance from the optium value(Characteristic impedance of the transmission line used in the line discriminator)

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A Suggestion for Improvement of Tension Balancer in Trolly Wire System (전차 선로 자동 장력 조정 장치의 개선 방안)

  • Yim Geum-Kwang;Yoon Yong-Han
    • Proceedings of the KSR Conference
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    • 2004.10a
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    • pp.1328-1333
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    • 2004
  • This paper presents a suggestion for improvement of tension balancer in trolly wire system. In the overhead trolly wire systems, one of the most things is tension balancer. Because it can be automatically adjusted tension for expansion and contraction of overhead catenary system. In this paper, we introduce and suggest spring tension balancer(STB).

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A Study on technical items in the speed-up of catenary system according to a conventional railway′s electrification (기존선 전철화에 따른 전차선로의 스피드업관련 기술사항에 대한 고찰)

  • 안영훈;강창호
    • Proceedings of the KSR Conference
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    • 2002.10a
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    • pp.516-521
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    • 2002
  • This paper was reviewed technical items of catenary system for electrification of Gyeongbu(Dongdaegu∼Busan) and Honam(Daejeon∼Mokpo) conventional Railways. The lines have adopted new technical items in order to connect to Gyeongbu high speed railway. We can use the technology and experience of Gyeongbu and Honam lines to a new catenary system design up-graded for speed-up of conventional lines and new lines construction.

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A Study on Automatic Switching System for Fault Locator (고장점 표정반 자동절체 시스템에 대한 연구)

  • Park, Yong-Bum;Lho, Young-Hwan
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.12
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    • pp.8927-8932
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    • 2015
  • A directional feeding method at the railway transformer is applied for supplying the power to the electric railway substations, and the pre-installed facilities with common feeder are utilized in preparation for the failure of feeding system and in finding a fault location in case that the catenary failure occurs. However, it is some difficulty in finding the fault location since there is an interface problem with the facilities when the supplying power system operates. In this paper, Auto Fault Locator Transfer Drive System (ALTDS) is designed to search for the fault location efficiently, and the measuring data are obtained and compared with the KORAIL standards. Further, the ground connection test is accomplished 24 times as the verification method, and it is shown that the methodology provides better performance than the existing traditional one.

Development of a Technique for Detection of Contact Wire Wear using High-Speed Camera (고속카메라를 이용한 전차선 마모 검측 영상처리 알고리즘 개발)

  • Park, Young;Cho, Yong-Hyeon;Cho, Chul-Jin;Kim, Won-Ha
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.23 no.8
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    • pp.632-637
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    • 2010
  • The measurement of contact wire wear in electric railways is one of the key test parameters to increase speed and maintain safety in electric railways. Wear caused by continuous interaction between pantographs and contact wires has a negative effect on current collection quality and severely damaged contact wires might cause hazardous accidents. This paper introduces a non-contact optical-based contact wire wear measuring system that will replace conventional wear detecting methods conducted by maintenance vehicles or workers. The system is implemented by high-speed cameras that can collect images of contact wires during vehicle operation, a laser used to create images profile of the contact wire surface, and a computer used to process the collected images. The proposed system is designed to assist maintenance of overhead contact lines by creating geometrically plotted images of contact wires to detect contact wire wear during operation on conventional lines or high-speed lines.

Development of Bending Fatigue Test System for Trolley Line Simulating Real Conditions (실사용조건을 모사한 전차선 굽힘피로 특성평가 시스템개발)

  • Kang, Min-Sung;Ahn, Sang-Soo;Koo, Jae-Mean;Seok, Chang-Sung;Lee, Ki-Won;Cho, Yong-Hyeon
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.3059-3064
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    • 2011
  • A Trolley line is a very important equipment among electric railway equipments since it contacts directly with pantograph and supplies electricity on the electromotive. Such it was thought that a trolley line need not to consider fatigue since the replace cycle by wear is shorter than the replace cycle by fatigue breakage. But, the bending fatigue breakage accidents occurred several times at the Shinkansen trolley line in East Japan Railway Company. Therefore, in case of a new developed trolley line, the evaluation for bending fatigue life became more important, But, since there are not an authorized fatigue test method and a testing device for the trolley line, the quantitative evaluation is difficult. In this study, we analyzed the load and environment condition of trolley line used in the actual spot and the developed testing device that can evaluate bending fatigue properties of the trolley line as simulating the real condition. The bending fatigue test of the trolley line was achieved using the developed testing device and estimated the fatigue life of trolley line and also, established the fatigue test process.

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