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창상훈(Chang Sang-Hoon),이장무(Lee Chang-Mu) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
In case the fault occurs in AC power supply network, protective relaying system must selectively detect line-to-line/ground fault and immediately cut off the power flow into the fault location for guaranteeing the safety of people, electric vehicle and ground installation etc. It is the most important point in power system operation to minimize the fault duration by rapid trip scheme and accurate estimation of the fault location. In this paper, we analyze the load characteristics of each vehicle, perform the fault analysis of AC power supply network using AT current-ratio method. The result shows its usefulness.
창상훈(Sang-Hoon Chang),이기원(Ki-Won Lee),장사술(Sa-Sul Jang),이태권(Tae-Kwon Lee) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
This study presents a development of DeCatS(Detail Design of High Speed Catenary System) which is a software to design high speed catenary system automatically. The program is developed by Korea Railroad Research Institute with the support of KHSR. A process of developing it and a comparison with LEXCAT, in order to demonstrate a preciseness of that, were performed. In the program, decision of H-beam, cantilever fitting, management of materials, automatic drawing and etc. according to input conditions can be accomplished. In this study, especially the program algorithm for the decision of mast was introduced.
창상훈(Sang-Hoon Chang),이기원(Ki-Won Lee),권삼영(Sam-Young Kwon),박재웅(Jae-Woong Park) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
This paper deal with technique of tension length calculation for 350㎞/h high speed catenary system. Tension length affects in facility investment. Possibility of overlap increasing a tension length and the equipment investor decreases in order to decrease. Considers the parameter which specifies and the grudge which is possible long the fact that decides a tension length is the aim which is important plans overhead contact line. The element which decides a tension length with next following; (ⅰ) Operating range of tension device, (Ⅱ) Change of the horizontal tension which affects possibility of the effect which operates to the line and span, (ⅲ) Tension of wire material the tensile force which is relation, (ⅳ) Wire thermal expantion which relates with a standard temperature, (ⅴ) Curve radius, (ⅵ) Wind velocity, (ⅶ) Thermal range of overhead contact wire and mechanical design of tension mechanism etc.
창상훈(Sang-Hoon Chang),이기원(Ki-Won Lee),유향복(Hyang-Bok Ryoo) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
This paper deal with maximum span calculation technique for 350㎞/h high speed catenary system. Considers a geometric interaction, possible maximum span length is between two pole. Wind condition and the train current collector is moving even to being pantograph does not escape while operating. Uses like this justice and possible maximum span length is follow next condition. (ⅰ) Operating range of pantograph fan head, (Ⅱ) The wind velocity which assumes from system, (ⅲ) Width in pantograph from operation height moving, (ⅳ) Type of processing Catenary system, specially tensile strength of overhead contact wire and messenger wire etc. When accurately calculates the maximum permission span, the dropper between of overhead contact wire and messenger wire and must consider the correlation.
창상훈(Sang-Hoon CHANG),한문섭(Moon-seob HAN),김주락(Joo-Rak Kim) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.11
전기철도의 에너지 소비형태를 다른 수송기관과 비교해 보면 에너지 소비 분담율 측면에서 약 8%정도를 차지하고 있으나, 수송 분담율은 약 30%이상을 점유하고 있으며, 화물의 경우 수송량의 5%를 담당하고 있지만 에너지 소비는 약 1%미만으로 에너지 효율성이 높은 것으로 나타났다. 그러나 기존의 방법으로 에너지소비에 대한 효율성을 비교 하는 것은 에너지 소비원이 다르기 때문에 문제가 있어 본 연구에서는 원유로부터 환산하는 효율 계산방법과 필요 에너지, 유효에너지 즉, ‘exergie’에 의한 평가 방법을 제안하였다.
창상훈(Chang Sang-Hoon),김주락(Kim Joo-Rak),이형수(Lee Hyung-Soo),김정훈(Kim Jung-Hoon) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
This study is carried out using a circuit model approach. First, the self and shunt impedances of all the conductors in the rail system and the mutual impedances between different conductors are computed. Then, a circuit representing the both rail systems at interfaces including the rails, feeders, protection wires, contact wires, ground wires is built. Auto-transformers in the system are also represented in the circuit model. The circuit model is then processed using a circuit solver based on a double-elimination method. Several different scenarios are analyzed, including the load conditions and a few fault conditions with different fault locations. The effect of the buried ground wires is also analyzed by comparing the results with and without the presence of the ground wires. The analysis procedure presented in the paper demonstrated an accurate way of computing fault current distribution and EMC at interfaces between both systems. The results presented in the paper can be used as a reference for estimating interference levels in similar rail systems.
집전성능 향상을 위한 전차선로 핵심설비의 설계 및 시공단계에서의 허용오차 기준 선정기법 고찰
창상훈(Chang Sang-Hoon),이기원(Lee Ki-Won),권삼영(Kwon Sam-Young),조용현(Cho Yong-Hyeon),백경령(Baek Kyung-Ryung) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
According to case high speed of the railroad advanced nation which operates the high-speed railroad applies a catenary system design and construction allowable tolerance and a maintenance standard differently. Allowable tolerance becomes the standard which judges whether to damage in compliance with the improvement and the periodical inspection at the time of vehicle or electric effect etc. This paper with current collection efficiency treats a allowable tolerance about the item which is effect directly.