• Title/Summary/Keyword: Catenary-line

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Review of the Improvement Plans on Catenary Systems for Speed Increase in Gyeongbu High-Speed Line

  • Eum, Ki Young;Yun, Jangho;Lee, Kiwon;Kim, Jung Hwan
    • International Journal of Railway
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    • v.6 no.2
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    • pp.64-68
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    • 2013
  • In recent years, the speed of a train has been recognized as one of the important factors to determine the competitiveness as a mean of transportation. In line with this, infrastructure improvements and enhancements are being made with increases in the speed of train. Accordingly, there is a need to establish plans for infrastructure improvements through a comprehensive analysis of signals, track/civil engineering, catenary and environment, etc. to improve the speed of a train of high-speed train service sections in Korea. This study proposes improvement plans for catenary systems by investigating the possibility of improvements through performance analysis of catenary equipment by speed increase based on the analysis on catenary systems in Gyeongbu high-speed line, and analysis the applicability of catenary improvements and economic feasibility.

A Study on Deicing Current Estimation Technique and Configuration Process for Deicing System in the Conventional Line (기존선 해빙시스템을 위한 해빙전류 예측기법 및 구성 절차에 관한 연구)

  • Kwon, Sam-Young;Park, Young;Jung, Ho-Sung
    • Journal of the Korean Society for Railway
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    • v.9 no.2 s.33
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    • pp.237-243
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    • 2006
  • Deicing system is to melt frost or ice freezed in catenary line when the temperature is lower than $0^{\circ}C$ in winter. The principle of deicing system is to melt frost or ice by Joule heat of catenary impedance. The performance of deicing is dependant of deicing current determined by the length of deicing section, deicing impedance and current division ratio of catenary line and messenger line. So, we present technique for estimating deicing current and process for determination of deicing section in the conventional line. Deicing impedance is estimated using Carson-Pollaczek equation, and current division ratio of catenary line and messenger line is estimated using voltage drop, and deicing current is estimated using power system data of deicing system. For the determination of the final deicing section, we verified estimated value comparing with experiment value of deicing impedance and current division ratio of catenary line and messenger line using low voltage experiment. Finally, we verified the validity of estimation technique and process using a simulated test data of real deicing system operation in the Chungju Substation, Chungbuk line.

A Study on the Development of Catenary stagger and height Measurement System (전차선 편위 및 높이 측정 시스템 개발에 관한 연구)

  • Song, Sung-Gun;Park, Seong-Mo
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.299-304
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    • 2008
  • Catenary and Pantograph are a power supply devices for electric trains and shall be steadily contacted. Rail catenary must be installed precisely and managed for stable train operations. But external factors such as weathers, nature, etc., or aging affect catenary geometry. Changed catenary height causes high voltage spark or instant electric disconnection. Big spark and disconnection damage pantograph shoe and catenary coating and might interrupt rail operations. To prevent a big scale spark or electric disconnection catenary maintenance shall be required with catenary geometry measurement systems. In this paper, we describe the development of catenary height and stagger measurement system. The catenary height and stagger measurement system uses Acuity company's AR4000 Range Finder for distance measurement and AccuRange Line Scanner for degree measurement. This system reports suspicious overhead line sections with excessive height and stagger variance.

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Utilizing Technology in Measurement System for Catenary Current: - Focusing on Testing Results for Kyoungbu High-speed Line in Korea - (조가선 전류 검측 시스템의 활용기술 연구 - 고속선 경부2단계 시험결과를 중심으로 -)

  • Park, Young;Jung, Hosung;Lee, Kiwon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.10
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    • pp.1465-1469
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    • 2013
  • The resent developed high speed train called HEMU-430X (Highspeed Electric Multiple Unit - 430km/h eXperiment) recorded a 421.4 km/h in Kyoungbu high speed line in Korea. A verity of measurement systems are used to check the performance between pantograph and catenary system. An innovative measurement system is adopted to check the current of catenary wire in the track side during HEMU-430X test running. This paper presents the measurement results of catenary current in kyoungbu high-speed line and describe its utilizing technology in the experimental results of catenary current. In order to analyze field testing results, the current ratio between contact and catenary current have been analyzed by means of Carson-Pollaczek equation. And the current wave forms between catenary and contact wire are presented based on the simulation results.

A Study on the Impedance Calculation by using Equivalent Model in Catenary System

  • Kim, Min-Kyu;Kim, Min-Seok;Kim, Dae-Hwan;Lee, Jong-Woo
    • International Journal of Railway
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    • v.3 no.2
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    • pp.46-53
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    • 2010
  • Electric railroad systems consist of rolling stock, track, signal and catenary system. In the catenary system, one of the most important factors is the impedance according to the design and characteristic. Before the catenary system is designed, the impedance should be precedently researched. The railroad catenary system is complex system which is composed by five conductors. The five conductors classify up and down feeders, up and down contact wire group, rail group. Therefore, we should compose the catenary system of the equivalent five-conductors model. In this paper, we suggest a geometrical model and a equivalent conductor model by using geometric mean radius of five conductors in the catenary system. Also, we calculate demanded parameter values in the model. By using those, line constants of five conductors are analyzed by applying the equivalent method called as the condensed joint matrix.

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The measurement and evaluation of catenary system by using electric rolling stock on Honam-Line electrified (전철화된 호남선에서의 전기차량에 의한 전차선로 측정 및 평가)

  • Ahn Young-Hoon;Hyun Chung-il
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.1286-1291
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    • 2004
  • This paper was showed evaluation method and technical items for measurement test of new catenary system of Honam(Daejeon - Mokpo) conventional railway electrified. This line have tested by three type new electric rolling stocks in order to test construction quality and operation safety of a new catenary system with speed-up than conventional speed. We have some important experiences through measurement test of catenary system by new device installed on train roof.

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Measuring results of the current distribution ratio between the contact wire and messenger wire in Chungbuk Line catenary (충북선에서 전차선대 조가선의 전류 분포비에 대한 측정 결과)

  • Kwon Sam-Young;Park Young;Jung Ho-Sung;Park Hyun-Jun
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.55-58
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    • 2005
  • In this paper, the measuring of the current distribution ratio between catenary and messenger wire on the condition of directly applying voltage to catenary at the Chungbuk line catenary in a process of de-icing system performance test is described. measuring" method and measured data are explained. Result values are also reviewed.

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Development of Catenary Stagger and Height Measurement System using Laser (레이저를 이용한 전차선 편위 및 높이 측정 시스템 개발)

  • Song, Sung-Gun;Lee, Teak-Hee;Song, Jae-Yeol;Park, Seong-Mo
    • Journal of the Korean Society for Railway
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    • v.11 no.6
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    • pp.569-574
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    • 2008
  • Catenary and Pantograph are used to transmit electrical energy to electric railways. Catenary (Overhead Contact Lines) should be installed precisely and managed for stable train operations. But external factors such as weather, temperature, etc., or aging affect catenary geometry. Changed catenary stagger and height cause high voltage spark or instant electric contact loss. Big spark derived from contact loss can damage the pantograph carbon strip and overhead contact lines that might interrupt the train operations. Therefore, to prevent a big scale spark or electric contact loss, catenary maintenance are required catenary geometry measurement systems with catenary maintenance capability. In this paper, we describe the development of catenary height and stagger measurement system. The catenary height and stagger measurement system uses Acuity company's AR4000 Laser Range Finder for distance measurement and AccuRange Line Scanner for degree measurement. This system detects suspicious overhead line sections with excessive stagger and height stagger variance.

Analysis for Catenary System with Focus on Abnomal Conditions on Honam High Speed Line (호남고속철도 전차선로의 이상 상태 분석)

  • Jun, Jaegeun;Shin, Seungkwon;Jung, Hosung;Na, Kyungmin;Park, Young
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.32 no.1
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    • pp.1-5
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    • 2019
  • The overhead contact line (OCL) is a key piece of equipment for transmitting electrical energy to the pantograph of rail cars. Recently, a 400 km/h OCL was applied to the Honam high-speed line, and its performance was examined by running HEMU-430X. For the study, we analyzed the current of catenary wire concurrently while running HEMU-430X in the Honam high-speed line. Specifically, this study recorded the currents for each speed during operation of the railway vehicle. The analysis of the frequency of line current showed generation of third-harmonics, 15th-harmonics, 17th-harmonics, and 19th-harmonics. The current of catenary wire is a basic technology assessment used to determine the electrical safety of electric railway systems, and it can be used as a technology for analyzing circulating currents generated in the current configuration, as well as for analyzing electric fatigue of the OCL components.

Estimation Technique of deicing current for configuration of deicing system in conventional line (기존선 해빙시스템 구성을 위한 해빙전류 예측기법)

  • Jung, Ho-Sung;Kwon, Sam-Young;Park, Young;Ahn, Byeong-Lib;Lee, Ju
    • Proceedings of the KIEE Conference
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    • 2005.10c
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    • pp.288-290
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    • 2005
  • Deicing system operated in high speed line is to melt frost or ice freezed in catenary line when the temperature is lower than 0 in winter. The principle of deicing system is to m디t frost or ice by Joule heat of catenary impedance. The performance of deicing is dependant of deicing current determined by the length of deicing section, deicing impedance and current division ratio of catenary line and messenger line. So, We present technique for estimating deicing current in convention line. Deicing impedance is estimated using Carson - Pollaczek, current division ratio of catenary line and messenger line is estimated using voltage drop, and deicing current is estimated using power system data of operation secion for deicing system in this technique. To verify the validity of technique, we compare the estimated current using technique of this paper with deicng current of high speed line.

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