• The Transactions of the Korean Institute of Electrical Engineers B
• /
• v.51 no.3
• /
• pp.99-106
• /
• 2002

This study presents an approach to model the Electric Railway System with the common grounding based on the 8-port network model and to analyse traction power feeding system focused on the amplification of harmonic current. The entire system can be easily modeled by the combination of 8-port representation of each component in parallel and/or series. Through the research, 8-port network model which can be effectively applied to harmonic analysis is derived.

• Proceedings of the KSR Conference
• /
• 2000.05a
• /
• pp.100-107
• /
• 2000

This paper proposes a new model for harmonic analysis in 2${\times}$25㎸ traction power supply system including inverted feeder, contact line, rails and auto-transformer. The system model is based on four-port representation which is an extension of two-port network theory. In order to verify the proposed approach, we have analysed and tested real traction power feeding system focused on the amplification of harmonic current. The calculation results front tile proposed approach and the measurement data from the test are widely described in the paper.

• Journal of Korean Tunnelling and Underground Space Association
• /
• v.2 no.3
• /
• pp.3-11
• /
• 2000

Purpose of this paper is to investigate the hood configuration at a tunnel entrance to reduce the micro pressure wave that is generated according to train speed. Two configurations were examined for the tunnel of 0.5 km in length. The experimental results show that a slit cover hood installed at the entrance of the tunnel reduces the maximum micro pressure wave by 41.2%, and the configuration with a slit cover hood installed at the entrance and the $45^{\circ}$ slanted portal at the exit of the tunnel suppress the pressure wave by 47.7%.

• Proceedings of the KSR Conference
• /
• 2001.05a
• /
• pp.97-102
• /
• 2001

If the Seoul-Pusan high-speed rail project is able to open its revenue service in 2004, Korea will be the fifth country with an HSR system in the world. And, it will be recorded as a major milestone in the transportation history of Korea. But, Government regulated railroad fare because railroad fare increase can bring negative influences to CPI(Consumer Price Index). Consequently, Korea National Railroad cannot afford to operate railroad independently under current railroad fare system. In this paper, we studied the railroad fare system under implementation and its influences to CPI. And then we proposed that railroad fare must be decided by competition with other transportation modes and based on the demand variance by introducing YMS(Yield Management System).

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.1 no.2
• /
• pp.225-253
• /
• 2006

Last 1970's Korea opened the Kyoung-bu highways from Seoul to Pusan, and Korea government had change the transportation policy to focusing on the road and motors. but 1990's Korea had been the heavily traffic jam in long distant transportation system and logistics. That's why Korea government studied on feasibility survey of High-speed train. As the KTX opens, traffic networks covering large areas In Kyeongbu-line (Seoul- Daejeon- Busan) are expected to raise synergy effects in economics as well as in korean culture respects. Having been playing an important transportation role in Korea for the last 106 years. With opening of the high speed railway, KORAIL in inevitable to make a drastic reform. To achieve this purpose, it is necessary that KORAIL has to be small and effective streamlined organization. In should increase traffic capacity by improving infra facilities. It need to also expand its internal functions by connecting the KTX with the conventional railroad system.

• 한국벤처창업학회:학술대회논문집
• /
• 2007.04a
• /
• pp.125-152
• /
• 2007

Last 1970's Korea opened the Kyoung-bu highways from Seoul to Pusan, and Korea government had change the transportation policy to focusing on the road and motors. but 1990's Korea had been the heavily traffic jam in long distant transportation system and logistics. That's why Korea government studied on feasibility survey of High-speed train. As the KTX opens, traffic networks covering large areas in Kyeongbu-line(Seoul-Daejeon-Busan) are expected to raise synergy effects in economics as well as in korean culture respects. Having been playing an important transportation role in Korea for the last 106 years. With opening of the high speed railway, KORAIL in inevitable to make a drastic reform. To achieve this purpose, it is necessary that KORAIL bas to be small and effective streamlined organization. In should increase traffic capacity by improving infra facilities. It need to also expand its internal functions by connecting the KTX with the conventional railroad system.

• The Journal of Engineering Geology
• /
• v.11 no.3
• /
• pp.295-301
• /
• 2001

Geological and geophysical surveys were performed to examined the cause of the rock-mass slide occurred at the opening site of the Wanglim tunnel of the Seoul-Pusan High Speed Railway. The results of geophygical survey and geometrical analysis for the geological structures indicate that the rock-mass slide was triggered by the heavy rainfall which increases the groundwater level and results in high pore pressure in the N60$^{\circ}$ E-trending major fractured zone of the slope, and that the foliation dipping toward the vertical open face of the slope acted as a main sliding plane during movement.

• Journal of Korean Society of Transportation
• /
• v.16 no.4
• /
• pp.33-52
• /
• 1998

본 연구에서는 국토동남권의 인구와 고용에 따른 공간구조 변화과정을 분석하고 향후 경부고속철도 건설에 따른 변화를 예측하였다. 본 연구의 공간범위는 양산시, 울산시, 경주시, 포항시를 대상지역으로 한 총 52개 지역공간을 기초분석 단위로 하였다. 국토동남권내 인구와 고용의 공간구조를 분석 전망하기 위하여 공간구조 측정방법인 로렌쯔곡선측정식, 중심성측정식, 접근도측정식등의 기법을 이용하였으며 공간적 집중과 분산의 정도를 전망하였다. 본 연구에서는 1970년부터 1994년까지 인구와 고용구조를 조사하여 공간구조의 변화과정을 분석하였다. 그리고 현재까지 계획된 건설 공정을 바탕으로 개통 예정시점인 2006년부터 2016년까지의 국토동남권 공간구조를 전망하기 위하여 3가지 시나리오에 따라 인구와 고용의 공간구조 변화를 예측하였다. 시나리오(1)은 경부고속철도의 서울-대구 구간을 우선적으로 건설하여 운행하고 대구-부산 구간은 경부철도의 기존선을 전철화하여 활용하는 방안이다. 시나리오(2)는 경부고속철도를 기본계획과 같이 2006년 완공하고 국토동남권내 1개 정차역인 경주시 건천역을 개통하였을 경우이다. 시나리오(3)은 시나리오(2)와 같은 조건하에서 국토동남권내 2개 정차역인 건천역과 울산역을 개통하였을 경우이다. 시나리오 (2)와 (3)의 경우는 일본 시즈오카현 노선을 경유하는 신간선 주변의 지역공간 특성이 우리나라 국토동남권과 유사함을 근거로 신간선개통전과 개통후의 지역공간 변화를 분석하여 본 연구와 비교하였다.

• Proceedings of the KSR Conference
• /
• 2008.11b
• /
• pp.498-508
• /
• 2008

TECA(Terminal Cabin) has train information, fault display, maintenance function and training function for driver, as sub-device of Seoul-Pusan Express train's on-board computerized device. Concerning KTX train's driving, signal driving is required for high speed driving, and it is true that we have difficulty in troubleshooting and acquisition of basic information through long train and one-man driving. Therefore, rapid and correct processing about various information and TECA device for maintenance are indispensable for its utilization. But there is not study example in hardware, maintenance about this device and device development according to new requirements. Therefore, this study will help understanding of driver assistance terminal device's maintenance performance development, describing TECA's basic functions necessary for device development and its requirements. Accordingly, I suppose that this thesis will be utilized to complete specification, necessary for new driver assistance terminal device development.