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백병산(Baek Byung-San),서광덕(Seo Kwang-Duk),김종구(Kim Jong-Koo) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper describes the capacity calculation of power supply system for Light Rail Transit. Three factors are considered for the design i.e. substation arrangements, line configuration and substation power capacity. In this study, we considered all of them for capacity calculation of power supply system for LRT. At first, DC-fed-traction system is introduced on an outline, a characteristics of train and fed network, and design method of substation arrangements. Optimal design procedures are described, and program for capacity calculation of the system is presented. In addition, the computer simulated results are compared with the conventional simple calculation method.
경전철 직류급전계통을 위한 디지털 보호제어장치의 개발 및 적용에 관한 연구
백병산,김재철,Baek, Byung-San,Kim, Jae-Chul 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.2
본 논문은 경전철 급전시스템을 위한 직류보호제어장치의 개발 및 적용에 관한 것이다. 이를 위하여 직류급전계통의 단락특성을 이론과 실측자료를 이용하여 분석하였으며, 사고전류를 검출하는 기법의 개선안을 제시하여 직류 보호계전장치를 개발하였다 특히 계전기능 중 가장 중요한 고장선택계전기(50F)의 계전알고리즘을 개선하여 개발하였고, 이를 경북 경산 경전철 시험선에 설치하여 운전 중이다. 직류 보호계전기를 현장에 적용하기 위하여 그동안 불분명하고 명확하지 않았던 규정 및 규격을 개발과정에서 명확하게 정리하였다. 또한 특성시험과 EMC시험 규정 중 일부항목에 대해 시험방법이 제정되어있지 않아 IEC 규정의 분석을 통하여 객관적이고 타당한 시험회로, 방법 및 평가방법을 제안하였다. The DC protection and control device for the feeding system of a Light Rail Transit(LRT) system is developed. For the development, the short circuit characteristics in the system are analyzed. As a result a protection algorithm for the DC fault selective relay (50F) is newly proposed, and principles of the DC fault selective relay, Line Test Device (LTD), DC Over Current Relay (DC OCR) are introduced From the development, the specifications and codes used to be unclear have become clarified and summarized. Moreover, the methods to examine the protective characteristics and Electromagnetic Compatibility (EMC) are established Finally, the performance and the effectiveness of the developed protective relay have been verified with the test based on IEC. For the reliability of the system, the relay has been installed and is being operated at the test track of the LRT system at Gyeong-San.
Design and Assessment of DC Traction Power Supply System for Light Rail Transit
백병산,문종필,최준호,김재철,Baek, Byung-San,Moon, Jong-Fil,Choi, Joon-Ho,Kim, Jae-Chul The Korean Institute of IIIuminating and Electrica 2006 조명·전기설비학회논문지 Vol.20 No.4
전기철도 급전시스템의 설계와 평가에 관련하여 어려운 점은 고려해야 할 요소들이 많고, 시스템적 접근이 요구되나 단편적인 논문과 엔지니어링 측면의 접근이 대부분이다. 본 논문에서는 전기철도 시스템 중 국내외에서 최근 활발히 추진되고 있는 경량전철을 위한 직류 급전시스템의 설계 및 그의 적정성을 평가하는 기법을 체계화하였다. 먼저, 급전 시스템의 구성요소인 급전 변전소와 부하인 차량과 그리고 전력선을 포함한 전체 시스템의 특성파악하고 분석하였다. 실제 계통과 동일하게 모델링하기 위하여 축약 및 등가화를 하였으며, 등가화한 시스템을 해석하기 위한 방안으로 노드방정식과 반복접근법을 적용하였으며, 이를 체계화하여 모의절차, 평가 및 설계방법을 제시하였다. 제시한 알고리즘 및 설계절차에 따라 프로그램을 개발하였으며 사례연구를 통하여 그 유효성을 입증하였다. For the design of DC traction power supply system at new Light Rail Transit(LRT) construction, it is very important to determine system configuration, location and power capacity of substation. However, a LRT system consists of a number of subsystems such as train movement, power supply and traction drives, which inevitably contains many complexities and diversities. The objective of this paper is to clarify and systematize the design procedure and its assessment for the electrification system of a LRT line. This paper discusses in detail our approach to system design and its assessment. The whole DC-feeding network configuration, characteristics of a train, and design method of substation arrangements is thoroughly investigated for the design. As a result of the investigations, the design procedure is clarified and systematized and a computer program for the design and evaluation of the system is developed using the most suitable iterative method with nodal equation. To verify the proposed design and its assessment procedure, case studies for the DC traction power supply system of a planed Korean LRT line are performed.
성종국(Jong Kook Seong),최명준(Myung Jun Choi),우상길(Sang Gil Woo),백병산(Byung San Baek),허종성(Jong Sung Hur) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
As the capacity of a transformer has been increased, the overheating by a magnetic field from high current is becoming one of the main issues of the transformer. To solve this problem, efficient cooling system design is needed. In this paper, the cooling capacity of the radiator was analyzed to improve the cooling performance for an oil immersed transformer. The heat transfer rates depending on the radiator and the number of the fin were obtained by using numerical simulation method. From this analysis, we proposed an efficient cooling system for the transformer. And the effectiveness of the proposed analysis method was verified by comparing with the temperature rise test.