• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.6
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• pp.1025-1032
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• 2017

In this paper, the level of service (LOS) is defined for high-speed railway links and rolling stocks. Based on this LOS, how to manage high-speed railway facility is also suggested. The LOS is divided into 6 levels from A to F. The measurement of effectiveness (MOE) for railway links is derived from the relationship between a total delay time and a railway link utilization ratio. Another MOE, volume over capacity (V/C), is also proposed. On the other hand, the LOS for high-speed railway rolling stocks is based on the density of people in a rolling stock. Above all, LOS D is defined to the total number of seats. Then, LOS A is 50% of the LOS D, LOS B is 70% of the LOS D, LOS C is 90% of the LOS D and LOS D~F is defined as the maximum seats and standing people at the level of each. Finally, a method to manage high-speed railway links and rolling stocks is proposed in order to keep the level of service at the target by the government.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.20 no.10
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• pp.58-67
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• 2006

In this paper, real-time reactive power/power factor compensating equipment is suggested for improving power quality at electrical railway's substation in marshalling yard and designing optimal capacity of compensating equipment for actual apply at current marshalling yard. For this purpose, several kind of real-time reactive power/power factor compensating equipments are introduced and SVG(Static Var Generator) as optimal compensating equipment that is suitable for load characteristics of substation in marshalling yard is suggested. This paper shows proper simulations by suggested equipment using PSIM software and describe basic compensating principle and simulation results. Optimal capacity design for applying current marshalling yard is based on real measured power quality data. Power quality improvement that is performed by SVG as real-time reactive power/power factor compensating equipment is estimated at electrical railway's substation in marshalling yard. As reference, real-time reactive power/power factor compensating equipment is composed by voltage source inverter and DC capacitors.

• Journal of the Korea Society for Simulation
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• v.18 no.3
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• pp.23-34
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• 2009

In the railroad rolling stock depot, long-term maintenance tasks is done regularly every two or four year basis to maintain the functionality of equipments and rolling stock body or for the repair operation of the heavily damaged rolling stocks by fatal accidents. This paper addresses the computer simulation model building for the rolling stock maintenance shop for the CDC(Commuter Diesel Car) and Generator Car planned to be constructed at Daejon Rolling Stock Depot, which will be moved from Yongsan Rolling Stock Depot. We evaluated the processing capacity of two layout design alternatives based on the maintenance process chart through the developed simulation models. The performance measures are the number of processed cars per year, the cycle time, shop utilization, work in process and the average number waiting car for input. The simulation result shows that one design alternative outperforms another design alternative in every aspect and superior design alternative can process total 340 number of trains per year 15% more than the proposed target within the current average cycle time.

• Proceedings of the KSR Conference
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• 2005.11a
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• pp.694-698
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• 2005

The operation speed improvement of the train in electric railway must pursue continuously and need the investigation of whole railway system whole. The high-speed of the train is related to not only vehicle technique but also the infrastructure, signal system, operation technique, the trolley line and catenary, economical efficiency. Specially, in case of electric railway, we have to consider a technical investigation which is current collection efficiency improvement, voltage drop countermeasure, equipment capacity, track force, signal system. In this paper, we presents the technical investigation of AT feeder system in order to achieve high speed train in exist real railroad. We proved this approach which will use the whole domestic lines in the future.

• 기계와재료
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• v.25 no.3
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• pp.130-136
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• 2013

철도차량용 제동장치 성능시험기는 제륜자의 마찰계수, 마모량, 열반점 등의 물리적 성질을 실차와 유사한 환경조건에서 시험을 수행함으로써 제륜자의 연구개발 및 성능평가의 목적으로 활용한다. 제륜자는 차량의 운동에너지를 열에너지로 변환한다. 성능시험기는 철도차량의 주행 운동에너지에 해당하는 관성질량으로부터 회전 운동에너지에 해당하는 관성모멘트를 조성하여야 한다. 공용 시험기에서 각종 철도차량에 대한 관성모멘트를 기계적 관성모멘트인 플라이휠로 모의하기에는 용량도 크고 구조가 복합하여 현실적으로 한계가 있다. 본 연구에서는 기계적 관성모멘트의 한계를 극복하고자 전기적 관성모멘트를 부가적으로 활용하는 기법을 제시하고 이를 적용한 시험기를 소개하고자 한다. 이러한 연구는 시험기의 외형적인 크기를 줄이고 또한 각종 철도차량에서 요구하는 정량적인 관성질량의 모의가 가능하리라고 사료된다.

• Proceedings of the KSR Conference
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• 2005.11a
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• pp.65-71
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• 2005

본 논문에서는 PRT(Personal Rapid Transit) 시스템의 성능과 시스템의 안전에 영향을 미치는 PRT 시스템의 운전시격(Headway)에 대해서 다룬다. 어떤 차량과 다음 차량과의 운전 간격을 나타내는 운전시격은 대중교통수단에서 교통 혼잡의 문제를 풀 수 있는 중요한 단서가 되는 성로용량을 평가하는 중요한 인자들 중의 하나이다. 운전시격을 결정하기 위한 중요한 인자들에는 고장 차량의 감속비, 고장차량의 후미에 있는 차량의 비상 제동 감속비, 차량의 선로속도, 차량의 제동을 위한 지연시간 등이 있다. 이들 인자들을 이용한 간단한 해석적 방정식은 차량의 선속도, 감속도와 운전시격에 대한 상관관계를 예측할 수 있도록 해준다. 본 논문에서는 간단한 해석 방정식을 이용한 수치 해석적 방법을 통해서 최소 운전시격에 대한 평가를 예를 간단한 모의시험을 통해서 보인다.

• Proceedings of the KSR Conference
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• 2011.05a
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• pp.413-422
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• 2011

A battery is an important part of the component, as a power source of the control of rolling stock at starting movement or emergency control. Now widely used batteries are Ni-Cd batteries and lead accumulators, and these are increasingly getting smaller and lighter. In addition, the electric capacity required is increasing, due to the development of electronic control technology of rolling stock. Therefore, various kinds of high-efficiency battery are considered for the new routes' rolling stock, but rolling stock's batteries should be fully tested to prove safety and also have no difficulty in terms of management, so because of the requirement, it is difficult to be in practical application. In this paper, we will survey cases of applying battery to rolling stock and then we will review whether there is any problem about safety and performance, management to discuss future trend of batteries.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.41 no.1
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• pp.75-83
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• 2021

Over-urbanization has contributed to the increase in traffic problems. This makes the need for effective road planning and design more important than ever. I have been able to learn how to build a new road, and how to use it. However, in spite of the importance of good road planning, there are no systematic standards or methods for calculating traffic volume on railroad routes. Therefore, in this study, to strengthen the competitiveness of railroads, the concept of line capacity is introduced to railroads, and a clear standard and method for calculating railroad line capacity are presented. Based on the results, the line capacity of main railway lines for domestic railways was calculated. By applying the method of calculating the line capacity presented in this study, the capacity of existing railway lines and newly expanded routes can be calculated. It is expected that our findings will be able to provide systematic standards that can be applied to yield a more effective investment and design planning stage; the findings will also help improve the efficiency of railroad operation.

• 전기의세계
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• v.38 no.6
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• pp.12-18
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• 1989

한국형 고속전철을 고려하는데 있어서 위에서의 기술적인 측면보다도 오히려 수송용량, 경제성, 운영방식의 측면에서 더 많은 비중을 두고 검토해야 하는지도 모른다. 그러한 측면에서 한국형 고속전철은 한국의 지형조건, 경부간의 연변인구, 현경부선의 장래, 고속전철의 운영방식, 한국철도의 기술수준 등을 고려하지 않으면 안되고 한국형이어야 한다. 한국형 고속전철은 1. 경부간 고속전철의 거리는 380Km정도이므로 2000년대의 국민 일인당 시간가치를 기준으로 최고속도를 결정하여야 하고 표정속도는 190Km/h이상이어야 한다. 2. 고속화를 위한 필수조건인 차량의 축중을 17톤 이하로 제한하여야 하고 기존의 철도차량이 고속전철선에 야간열차등으로 투입되더라도 이 원칙은 유지되어야 한다. 3. 수송능력을 확보하기 위하여 열차편성당 좌석수는 800석 이하로 확보되어야 한다. 4. 기존선에서의 연장운행이 불가피하므로 기존선의 차량한계 내에서 안전하게 운행될 수 있어야 하고 전력공급은 기존선 방식인 A/C25KV, 60HZ의 사용이 불가피하다. 5. 고속전철의 건설비용, 차량의 제작비, 기술이전도, 국산화율 등을 고려한 시스템이어야 한다. 한국형 고속전철은 위의 기본원칙을 최소한 만조시킬 수 있는 시스템이어야 한다.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.1612-1627
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• 2008

Dwelling time is one of the factors that influence in rail. Current research in dwelling time has been focusing on railways, the state of the research in high-speed rail's dwelling time is not complete. Dwelling time is consisted of time to open door, time to get into and out of vehicle and time of the departure it takes after the passenger's door was closed, it was affected by various factors such as congestion's degree in vehicle, the number of persons that get into and out of vehicle, congestion's degree in station. In order to analyze theses, we need data analysis such as the number of persons that get into and out of vehicle, congestion's degree in station, congestion's degree in vehicle, but the congestion's degree and passenger's distribution chart in vehicle is excluded in this research due to difficulty of gathering data, and thus we will develop forecasting models through high-speed rail's demand most affected by the dwelling time.