• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(I)
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• pp.387-395
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• 2002

As a result of an increase in population of the Metropolitan area and a steady change of circumstances in many parts, the city is sprawling out into the suburbs. This phenomenon causes the necessity of modification of present urban plan. It is risen as a point of issue that construction systems of new railway routes and underground construction, which should be followed the new urban plan in case of inter-regional railway and regional railway. It is hard to find sufficient financial resources, nevertheless the railway improvement definitely affects regional development and improvement of social environment. Also, there is a limit to government subsidies. In this respect, it is necessary to set up a new idea about movement of existing railway routes and improvement of the equipment. This study examines the present problems of railroad construction system in urban downtown area and introduces a suitable institutional way through referring to the instances of other countries.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.545-551
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• 2006

Along with the steady development of Korean Railway construction technology, Contemporary society needs more modernized structures which can meet not only structural value but also aesthetic and environmental value. To follow this demand of society, Pre-Stressed Concrete U-girder bridge(Somg-Lim Gyo, L=330m) is introduced in 'JINJOO-KWANGYANG RAILWAY CONSTRUCTION PROJECT'. On the environmental point of view, the huge noise due to the operation of train can be reduced remarkably by the side beam of U-girder which is high enough to substitute soundproofing wall. Moreover, by aesthetic variation of the shape of outer beams and coping of piers, the exterior view of the bridge can be improved and in accordance with surroundings. Pre-Stressed Concrete U-Girders which are built up above the outer sides of slab deck make easier to secure the clearance of a bridge and make it possible to lower the distance of centroid between superstructure and railroad tracks.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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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.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2006년도 추계학술발표논문집
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• pp.73-75
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• 2006

본 논문은 현재 운행 하고 있는 과천선의 도시철도를 중심으로 충돌 속도별 인명 상해치를 연구 하였으며 더 나아가 에어쿠션의 유무에 따른 인명 상해치를 저감시켜 많은 인명을 구조하기 위한 에어쿠션의 개념 설계를 하였다. 그 결과 에어쿠션 장착에 따른 높은 인명 구조 효과가 있음을 제시 하였으며 개념 설계를 기초로 하여 시험을 수반한 해석을 실시한다면 선로 침입자를 위한 도치철도 구조장치를 개발 할 수 있을 것이다.

• 전력전자학회논문지
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• 제7권1호
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• pp.74-80
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• 2002

철도차량용 추진시스템은 안전성과 신뢰성 때문에 성능을 평가해야만 한다. 일반적으로 Flywheel Type시험방법은 시험설비로 널리 사용되고 있다 그러나 Flywheel에 의해 생기는 기계적 관성은 변하기 어렵고 실제적인 주행저항을 표현할 수 없다. 본 연구는 다양한 차량부하의 개발에 초점을 두고 수행되었다. 그렇기 때문에 실제적인 차량 부하 특성을 얻기 위해 벡터모터에 의해 제어되는 다양한 차량부하를 사용하는 방법을 제안하였고 컴퓨터 시뮬레이션을 통해 결과를 확인하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 B
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• pp.1323-1325
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• 2003

In field of Urban transit safely, It must be not only secured vehicle but also every areas like power, signal, communication, track, tunnel, operating facilities. Likewise it is very important not only hardware system like vehicles, facilities but also software system like action of engine driver, duty officer. In other to secure safety of hardware, soft ware, it is very important systemic process. In Korea, Many operating companies neglect to invest in safely and ignore technical development about safety because of management. Safely was considered in subway system and many studies were accomplished about safety in subway system in advanced county like U.K, USA. Hence, in this paper, Conditions and improvement of minimum considerable hardware and software are proposed for safe operation in Urban transit.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 B
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• pp.1332-1334
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• 2003

Safety of breaking facility is very important in subway safety, especially in case of subway that many people used, breaking capability is connected directly with safety and capability of vehicle. Recently, direction of subway technical development is established as passenger's convenience and agreeableness. However, we are known importance of safety in subway through Dae-gu subway incendiary case. Subway accident not happen only fire, vehicle collisions or passenger's fall to the track can happen. In this case, safety standard of breaking facilities is very important. so this paper define safety of breaking facilities and take proper that standard.

• 조명전기설비학회논문지
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• 제30권1호
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• pp.38-43
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• 2016

Recent social needs for promoting traffic safety increased and the demand social security in economic, increasing the demand for environmentally friendly rail transport. In particular, when train express such as to secure reliability KTX(Korea Train eXpress) from potential disaster(fire) in the train operation caused by the train express running has been very important. Railroad fire extinguishing system is operated to fire exploding before reaching the flashing point more important than early to quickly detect because of CAN(Controller Area Network) communication to fire suppression and fire receiver, interface, fire fighting equipment from HMI((Human Machine Interface) and fire high-performance to research and development for intelligent composite fire receiver is required.

• 전력전자학회논문지
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• 제22권2호
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• pp.118-125
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• 2017

In this paper, we propose a smart transformer for a smart transformer miniature model, which can replace a 60 [Hz] single-phase transformer installed in an electric vehicle. The proposed smart transformer is lighter than a conventional transformer, can control instantaneous voltage, and can be expected to improve power quality through harmonic compensation. The proposed intelligent transformer consists of an incoming part, an AC/DC converter, and a dual active bridge. Only the incoming part and the AC/DC converter are described in this paper. The proposed intelligent transformer has 75 kVA 3.3 kV input and 750 V DC output, which are verified by simulation and experiment.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1177-1178
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• 2007

There is a possibility of saying that the accident of urban transit vehice or deficit operation is caused by the m.aintenance. urban transit vehice where the efficiency is good though does the time passes and it becomes old anger and does not display that efficiency not only the cause of formation accident does becomes. The breakdown about under occurring before getting up an accident, appropriately shifting the parts is to a maintenance very the pending question fact which is important is a possibility of doing. From there is by an urban transit vehice, Mauntenance in reliability base grudge is a tool of confirms an improvement point and the place where it judges. From the research which it sees will present about technical development plan of Maintenance.