• Title/Summary/Keyword: 집전성능

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A Study on the Estimation and Improvement of the Current Collection Performance for the Next Generation High-Speed Train (HEMU-430X) (차세대 고속철도의 집전성능 예측 및 향상 방안에 관한 연구)

  • Lee, Jin-Hee;Park, Tae-Won
    • Journal of the Korean Society for Railway
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    • v.15 no.5
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    • pp.429-435
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    • 2012
  • The HEMU-430X is a world-class railway vehicle which aimed the maximum speed of 430km/h and the operation speed of 370km/h. To maintain high-speed operation condition over 300km/h, various requirements for satisfy exist. However, one of the most important things is a reliable supply of electricity. Especially, the dynamic interaction between the pantograph and overhead contact line at high-speed is a significant matter to pre-evaluate. In this paper, using the dynamic interaction analysis program, current collection performance of the HEMU-430X was investigated. Firstly, based on the international standard, performance of the original specifications was evaluated. In addition, through study on changes in tension and span length, improvement of the performance was considered.

Analysis of the Major Design Parameters of a Pantograph-Railway Catenary System for Improving the Current Collection Quality (집전성능 향상을 위한 팬터그래프-전차선의 주요 설계 파라미터분석)

  • Cho, Yong Hyeon
    • Journal of the Korean Society for Railway
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    • v.17 no.1
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    • pp.7-13
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    • 2014
  • Stiffness variations and wave propagation/reflection in railway catenaries are the primary sources of contact loss between a pantograph and a railway contact wire. This paper analyzes which design parameter is more important for 200km/h conventional rail and 300km/h high-speed rail, in order to effectively reduce the contact loss. For the high-speed rail, the wave propagation and reflection in the overhead contact lines are more influential than the stiffness variation over a span. When the high-speed rail needs to speed-up, it is necessary to develop higher strength contact wires in order to increase the wave propagation speed. In addition, the dropper clamp mass should be reduced in order to alleviate the wave reflection. However, it is noted that the increase in the tension to a messenger wire could deteriorate the current collection quality, which contrasts with expectations. For the 200km/h conventional rail, the stiffness variation over a span is more influential than the wave propagation and reflection. Therefore, shortening span length, increasing the tension in the contact wire and optimizing the location of the droppers are recommended for a smoother stiffness variation over the span.

Development and Verification of a Dynamic Analysis Model for the Current-Collection Performance of High-Speed Trains Using the Absolute Nodal Coordinate Formulation (절대절점좌표를 이용한 고속철도 집전성능 동역학 해석 모델 개발 및 검증)

  • Lee, Jin-Hee;Park, Tae-Won
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.3
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    • pp.339-346
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    • 2012
  • The pre-evaluation of the current-collection performance is an important issue for high-speed railway vehicles. In this paper, using flexible multibody dynamic analysis techniques, a simulation model of the dynamic interaction between the catenary and pantograph is developed. In the analysis model, the pantograph is modeled as a rigid body, and the catenary wire is developed using the absolute nodal coordinate formulation, which can analyze large deformable parts effectively. Moreover, for the representation of the dynamic interaction between these parts, their relative motions are constrained by a sliding joint. Using this analysis model, the contact force and loss of contact can be calculated for a given vehicle speed. The results are evaluated by EN 50318, which is the international standard with regard to analysis model validation. This analysis model may contribute to the evaluation of high-speed railway vehicles that are under development.

A Study on Efficiency Improvement of the Catenary-Pantograph Dynamic Interaction Analysis Program using Shift Forward Method (Shift Forward 방법을 이용한 가선계-판토그래프 동적 상호작용 해석 프로그램의 효율성 향상에 관한 연구)

  • Lee, Jin-Hee;Park, Tae-Won
    • Journal of the Korean Society for Railway
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    • v.15 no.6
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    • pp.572-578
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    • 2012
  • In the electric railway vehicles, securing stable current collection performance is an important factor which determines the quality of operation and the maximum speed. In order to predict such current collection performance, various analysis methods have been proposed for a long time. Also, investigations for improving the accuracy of the results and the efficiency of the analysis process have been performed. In this paper, a method for the efficiency improvement has been proposed. This method is based on the basic concept that the system equations of motion of a catenary numerical model include only interactive range with a pantograph. In this paper, an algorithm and generalized process for applying proposed method are introduced. Also, validity of the results and utility of the method was verified and studied.

Analysis of Effect of Pantograph Cover on the Current Collection Quality of High Speed Train using Real Train Experiment (실차시험을 통한 팬터그래프 커버가 고속열차의 집전성능에 미치는 영향에 대한 분석)

  • Oh, Hyuck Keun;Kim, Seogwon;Cho, Yong-hyun;Kwak, Minho;Kwon, Sam Young
    • Journal of the Korean Society for Railway
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    • v.19 no.4
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    • pp.409-416
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    • 2016
  • The contact force characteristic between the pantograph and the catenary wire represents the current collection quality of trains; it should be precisely controlled under international standard. Recently, a noise reduction cover has been installed around the pantograph of high speed trains. However, little study on the contact force by the pantograph cover has been conducted. In this study, the impact on the current collection performance of the pantograph cover was analyzed by dynamic contact force measurement using a next generation high speed train (HEMU-430X). As a result, it was confirmed that the attachment of a pantograph cover could lower the mean contact force by approximately 50N at 300km/h. In addition, the pure difference of the average contact force by the presence of pantograph cover, except for the static pressure, was measured and found to be up to 110N at 300km/h. It was also found that the standard deviation of the contact force of 3~5N could be changed by use of a pantograph cover.

Analysis of the Current Collection Quality for Next Generation High-Speed Trains with Measurements of the Dynamic Contact Force (동적 접촉력 측정을 통한 차세대 고속열차의 집전성능 분석)

  • Oh, Hyuck Keun;Ji, Hyung Min;Kim, Young Guk;Kim, Seogwon
    • Journal of the Korean Society for Railway
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    • v.17 no.3
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    • pp.157-164
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    • 2014
  • The contact force between the pantograph and the catenary is a key factor determining the current collection quality, as they can ensure stable electrical power to the train. In this study, we analyzed the dynamic contact force for HEMU-430X depending on the train speed. It was confirmed through the results that the standard deviation of the contact force increases with an increase in the train speed. It was also verified that the span of the catenary system is a very important factor with regard to the contact force when analyzed with frequency analysis. To secure stable power in speed that exceeds 400km/h, the statistical variation of the contact force should be minimized. To realize this, the catenary tension was increased and the mass of the pan-head was decreased. The ensuing effects were then quantitatively analyzed in terms of the contact force. In addition, the differences in the contact force between a tunnel and an open field were analyzed based on a frequency analysis.

A study on experiment methods and effectiveness of the current collection study using the speed scale-downed catenary-pantograph model (속도 축척 모형 실험 방법을 통한 집전계 성능 분석 연구의 실험 방법 및 효용성에 대한 연구)

  • Park, Sa-Hoon;Kwon, Sam-Young
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.874-882
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    • 2008
  • To test the current collection characteristics between overhead contact lines and pantograph in a real speed scale costs too much, therefore, it is very difficult to be realized especially in a high speed region. As a alternative, the speed scale-downed tests is proposed. In this paper, the experimental methodology and effectiveness of the speed scale-downed tests are discussed through the dynamic simulation evaluations. To get a more precise test results to the real speed scale test in the 1/2 and 1/4 speed scale-downed tests, various experimental conditions are discussed. Throughout the simulation in a various conditions the effectiveness are evaluated.

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Current Collection Performance of Catenary System within Tunnel Section (터널구간 가선계의 집전성능)

  • Son Gun-Ho;Lee Seung-Il;Choi Yeon-Sun
    • Journal of the Korean Society for Railway
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    • v.8 no.1
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    • pp.51-56
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    • 2005
  • A dynamic simulation program of a catenary-pantograph system including tunnel section and transient section is developed in this study. The simulation program can accommodate for the pantograph of two panheads and three d.o.f model. Using the developed program, the dynamic characteristics with a SCHUNK'S WBL 85-PANTOGRAPH are analyzed at the conventional TAEBAEK line and its tunnel section when the catenary system is supported by a tunnel bracket. The simulation results show that the variation of contact force md uplift displacement is allowable in general section and the entrance and exit of a tunnel, but the uplift displacement and the separation ratio within tunnel section is difficult to allow.

Electrochemical Properties of Current Collector in the All-vanadium Redox Flow Battery (바나듐 레독스-흐름 전지에서 집전체의 전기화학적 특성)

  • Hwang, Gan-Jin;Oh, Yong-Hwan;Ryu, Cheol-Hwi;Choi, Ho-Sang
    • Korean Chemical Engineering Research
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    • v.52 no.2
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    • pp.182-186
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    • 2014
  • Two commercial carbon plates were evaluated as a current collector (bipolar plate) in the all vanadium redox-flow battery (V-RFB). The performance properties of V-RFB were test in the current density of $60mA/cm^2$. The electromotive forces (OCV at SOC 100%) of V-RFB using A and B current collector were 1.47 V and 1.54 V. The cell resistance of V-RFB using A current collector was $4.44{\sim}5.00{\Omega}{\cdot}cm^2$ and $3.28{\sim}3.75{\Omega}{\cdot}cm^2$ for charge and discharge, respectively. The cell resistance of V-RFB using B current collector was $4.19{\sim}4.42{\Omega}{\cdot}cm^2$ and $4.71{\sim}5.49{\Omega}{\cdot}cm^2$ for charge and discharge, respectively. The performance of V-RFB using each current collector was evaluated. The performance of V-RFB using A current collector was 93.1%, 76.8% and 71.4% for average current efficiency, average voltage efficiency and average energy efficiency, respectively. The performance of V-RFB using B current collector was 96.4%, 73.6% and 71.0% for average current efficiency, average voltage efficiency and average energy efficiency, respectively.

온라인 전기 자동차를 위한 급전 및 집전 시스템

  • Jung, Gu-Ho;Lee, Kyung-Hun;Kim, Hyung-Guk;Cho, Yang-Jin;Song, Bo-Yun;Son, Young-Dong;Park, Eun-Ha;Choi, Ju-Young;Kong, Byung-O;Huh, Jin;Son, Ho-Sub;Cho, Jung-Gu;Rim, Chun-Taek;Jeon, Sung-Jeub
    • Proceedings of the KIPE Conference
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    • 2010.07a
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    • pp.218-219
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    • 2010
  • 온라인 전기자동차는 도로에 매설된 급전선로로부터 유도자계를 통하여 비접촉 방식으로 전기를 집전 받아 정차 및 주행 중에 충전하는 자동차이다. 이러한 비접촉 충전을 위해서는 도로에 매설된 급전 시스템과 차량 하부에 장착된 집전 시스템이 필요하며, 급전 시스템은 다시 급전 인버터와 급전선로로, 집전 시스템은 집전 모듈(pick-up)과 집전 레귤레이터로 구성된다. 본 논문에서는 급집전 시스템 각각의 장치를 소개하며, 더불어 구축된 시스템의 성능에 대해서도 소개한다.

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