• 한국신재생에너지학회:학술대회논문집
• /
• 2010.06a
• /
• pp.162.2-162.2
• /
• 2010

The energy storage system is considered to be one of the useful devices for energy storing and recycling. the energy storage system can save energy cost and stabilize the system voltage. This paper presents the development of two energy storage systems. One is 750V system for light rail system. the other is 1500V system for heavy rail system.

• Proceedings of the KSR Conference
• /
• 2002.10a
• /
• pp.300-306
• /
• 2002

To construct ligh rail transit, many local autonomous entities investigate the feasibility of project. Especially, many studies attempt to find the probability of private inducement and the method. The purpose of this paper is to develop the light rail transit financial analysis system for private sector, based on the procedure and the method of the financial analysis. This system consistes of the income and cost module. As a result, provide the cash flow, income statement and financial profit statement for the result. We hope that it is contributed to analyze the feasibility of the finance conveniently.

• Proceedings of the KSR Conference
• /
• 2003.10c
• /
• pp.547-551
• /
• 2003

This paper presents the magnetic fields shielding properties of the light rail transit which are produced by the ripple-shaped currents in the power lines. To analyze these properties, the equivalent circuit model of the DC power supply system at the light rail transit system was induced by MATLAB-SIMULINK, and with the calculated results of the ripple-shaped currents, the magnetic fields shielding properties of the light rail transit were analyzed. The results are as follows. First The frequency of the ripple-shaped currents is 200[Hz] and its magnitude is 1.5[A]. Second the magnetic fields produced by the ripple-shaped currents of the DC power supply systems are well shielded by the aluminum made body of the light rail transit.

• Proceedings of the KSR Conference
• /
• 2003.10b
• /
• pp.98-103
• /
• 2003

Recently, to solve the urban transportation problem, the introduction of Light Rail Transit system has been proceeded positively. therefore, development of the Korean standard LRT system in which safety, efficiency and cost effectiveness are emphasized. The Korea Railroad Research institute study on Rubber Tired AGT system of Light Rail Transit to obtain the essential technology and engineering know-how, which leads lower LRT construction cost. In the development procedure, SE(system Engineering) is needed for combination of subsystem and optimum operation effect. This study is focused on the interface of LRT subsystem(Development of the rubber tired LRT, Power supply system, signalling and train control system, Elevated track structure for the rubber tired LRT), a important part of SE, to develop of the driverless LRT system and establish the test and evaluation.

• The Transactions of the Korean Institute of Electrical Engineers B
• /
• v.53 no.2
• /
• pp.99-106
• /
• 2004

Train control system in LRT (Light Rail Transit) is developed as a part of "Light Rail Transit System Development Project". But there was no specific requirement representing the system safety. Because system safety must be ensured before the customization, we applied the system to a officially recognized specific procedure, such as "A Guideline to Ensure the Safety of Train Control System in Korea" that was officially announced by KNR (Korea National Railroad) in 2001. We should draw system safely requirement to guarantee system safety for the first time. In this paper, the hazard identification and analysis to derive the safety requirement on LRT train control system are carried out following the KNR guideline. To analyze hazard, we have to deduce system functions, identify related hazards, derive the effects of the hazards, analyze current risk, define the target risk of the system, and deduce the alternative plans to reduce the effects of the hazards. After the hazard analysis following the upper procedure, 30 hazards are identified and analysed. Especially detailed analysis on train collision that is a main hazard of the train control of system is specially carried out.

• Journal of the Korean Society of Systems Engineering
• /
• v.8 no.1
• /
• pp.1-7
• /
• 2012

This research aims to propose a model to estimate the appropriate SE Cost rate to the total project cost when systems engineering applied to light rail transit project. In this research an investment cost estimation model is proposed with reference to COSYSMO (Constructive System Engineering Cost Model). This model includes four input factors such as requirement numbers, interface numbers, algorithm numbers, and scenario numbers. When 2600 requirement numbers are considered on a proposal document with 350 pages in a light rail transit specification of 500 billion~trillion won scale, COSYSMO demo version estimates 42.5 billion won of SE cost (about 5% of total project cost or about 10% of E&M cost).

• Proceedings of the KSR Conference
• /
• 2002.10a
• /
• pp.528-533
• /
• 2002

This paper proposes the Train Control Monitoring System (TCMS) for the LRT(light rail transit). With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the Train Control Monitoring System.

• Proceedings of the KSR Conference
• /
• 2003.10b
• /
• pp.46-51
• /
• 2003

The government's financial subsidy system for the construction project of urban rail transit needs to be revised. In 1998, the central government raised its subsidy rate to 50$\%$ of the total cost of construction. The 'method for differentiating subsidies depending on construction type and transit System' is suggested here, so that a subsidy rate can be raised for the construction of Light Rail Transit, which costs less to construct. Such methods will force local governments to make decisions regarding construction method and project size in a more rational manner.

• Journal of the Korean Society of Systems Engineering
• /
• v.7 no.2
• /
• pp.13-19
• /
• 2011

A LRT(Light Rail Transit) is one of the Future Urban Railway Development Project. The project's goal is to reduce a transportation congestion in the center of the city. New transportation is intensely required in order to overcome a limit of the ground transportation that is the existing public transportation, A LRT(Light Rail Transit) construction project to be based on an unmanned driving system is the large composition system that a vehicle, a signal, communication, electric, track etc. were organically integrated as echo-friendly urban transportation systems. It also put a huge budget, which is a large-scale infrastructure projects. It is international trend that Light Rail Transit projects apply a technique in System Engineering for a schedule, cost, quality elevations, and to approach in viewpoints of life-cycle from initial construction steps to operation, abolition. This paper intends to analyze RAM requirements taking into consideration ISO/IEC 15288 throughout life-cycle from concept, design, manufacture, operation and maintenance to the final phase, decommissioning, and the study seeks to suggest directions of efficient use to domestic LRT projects.

• Proceedings of the KSR Conference
• /
• 2011.10a
• /
• pp.517-544
• /
• 2011

Promote competition in local government and the construction of a subway construction in the vicious cycle of debt due to the operating deficit as a greater burden on local finances was leave. This government policy of public transport in the center of the metro construction costs affordable and to respond appropriately to public transport demand new transit LRT(Light rail Transit) by introducing the current Busan was the opening of Line 4, yongin line, Busan - Gimhae line, parliamentary and barge construction or ready for the opening. What is light rail, compared to the existing subway and cheaper construction cost, the existing road or bridge that runs along the track is installed, etc. Manless system construction cost and operating expenses as a possible new railway transportation has been a leading state-of-the-art mad. However, the domestic business system engineering of light rail-related companies in the developed countries are doing to advance to the national to the local engineering skills of the self-free, hurry will have to be secured. Therefore, this paper applies local light rail project on the status of the systems engineering analysis and based on this source of the latest engineering technology-intensive systems engineering to provide direction to the development of technology.