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RISS 인기검색어
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- 저자 : Kiwon Lee(이기원) (검색결과 212 건)
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속도향상에 따른 열차속도와 전차선 파동전파속도에 대한 실험적 연구
이기원(Kiwon Lee) 대한전기학회 2013 전기학회논문지 Vol.62 No.12
An overhead catenary system is the one of the main subjects for increasing speed in electric railway. When a vehicle increases the speed over 350km/h, vibrations and wave propagation reflections occur severely. Therefore, the system suitable for the speed are needed. A wave propagation speed of contact wire is the main criteria to determine the tension for the system. Therefore, a train speed is restricted below 70% of wave propagation speed of it in European railway code. In this study, we measured a strain and uplift of contact wire while HEMU-430X tain is operated for the speed-up trial test in Kyungbu high-speed railway. The measured strain and uplift are analyzed with wave propagation speed according to the speed-up. The more a train speed reaches to a propagation speed, the more measured strain is high. Through the study, an experimental approach is performed about the code which a train speed is restricted below 70% of wave propagation speed of it.
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이기원(Kiwon Lee),권삼영(Samyoung Kwon),김주락(Joorak Kim),창상훈(Sang-Hoon Chang) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
Even if tracks cross each other, a train has to maintain a good current collection. Where catenary cross each other, it is called a crossover. Based on the cause analysis for a breakdown accident of pantograph occurred in the crossover on Ansan-line, a theoretical background and recommendation for the installation rule of a crossover are presented in the paper.
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이기원(Kiwon Lee),정호성(Hosung Jung),박영(Young Park),조호령(Ho Ryung Cho),이상식(Sang Sik Lee) 대한전기학회 2013 전기학회논문지 Vol.62 No.11
In a section of AC electric railway, a phase between the sections is different although voltage levels supplied from substations are the same. Therefore, section insulators have been installed to electrically divide between the sections. Two differenet types of section insulator, namely an overlap type and insulator type, are used. In Korean high-speed lines, overlap type section insulator has been adopted. And, insulator type is used in conventional line. The overlap type has the advantage of having no speed limit, but has the disadvantage of requiring long section length. However, the insulator type has the advantage of section length, but also has the disadvantage of having speed limit. In Korean conventional line, an insulator type one relies on the import and there is some problem with wear. In this study, we developed the insulator type section insulator which adopts Teflon tube insulation material. The Teflon material has advantage of the excellent electrical characteristics and wear-resistance characteristics for a longer expected life than that made of existing FRP. In order to compare wear characteristics between the materials, wear tests with reciprocal wear tester are performed. And dynamic behavior tests between the insulators and pantograph are also performed for showing its better dynamic characteristics.
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이기원(Lee Kiwon),권삼영(Kwon Samyoung),조용현(Cho Yong Hyeon),이태권(Lee Taekwon),이경훈(Lee Kyunghoon) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
A detail design of overhead catenary system can be divided into a pegging plan and a design of MD(mounting diagram). In the pegging plan, the mast location, staggering and tension length are determined in the longitudinal point of view according to track condition, location of substation and etc. In the MD, a transversal diagram including masts, all of wires, cantilever, foundation and etc. and materials used are shown. This study presents a development of a software to design the MD for a conventional catenary system automatically. In the program, thin walled steel pole, foundation, cantilever, all of wires and etc. are automatically drawn according to the input and catenary conditions. And materials used in the MD and the section can be also managed respectively in the program. This application of the program is developed using C# for input/calculating and using C++(ObjectARX) for drafting the MD, respectively.
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