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차준민(Jun-Min Cha),구본희(Bon-Hui Ku) 대한전기학회 2010 전기학회논문지 Vol.59 No.1
As catenary supply electric power directly to the railway system, it is very important to prevent an accident of a catenary for appropriate train operation. This paper proposed the assessment the outage data for "British Catenary Safety Analysis Report" and Korean data to compare the reliability of the railway system. The analyzed data were applied to Event Tree and Fault Tree algorithm to calculate the reliability indices of railway system. Event tree is created and gate results of fault tree analysis are used as the source of event tree probabilities. Fault tree represents the interaction of failures and basic events within a system. Event Tree and Fault Tree analysis result is helpful to assess the reliability to interpreted. The reliability indices can be used to determine the equipment to be replaced for the entire system reliability improvement.
차준민(Jun-Min Cha),구본희(Bon-Hui Ku),윤경하(Kyoung-Ha Yoon),조범섭(Burm-Sup Cho),변성현(Sung-Hyun Byun) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
발전기를 통한 무효전력의 공급은 공급가능한 무효전력의 능력의 사전예측이 가능하며 중앙의 지시를 받아 운영가능한 무효전력의 공급원이다. 무효전력의 공급은 계통에서 송전손실을 감소하고 모선전압을 기준 범위 내에서 유지하여 소비자들의 기기 사용을 보호하는 역할을 한다. 본 연구에서는 발전기 출력 특성자료의 최대 유효전력(Pmax)값에 해당하는 발전기출력가능곡선의 P-Q 곡선에서 한계값을 찾고, 이를 통하여 발전원 별 공급가능한 무효전력 용량과 발전기의 무효전력 공급능력에 대하여 알아보았다.
차준민(Cha Jun Min),김형철(Kim Hyung Chul) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
The DC electric power system is the most important power source in a metro railway system. As metro railway system is expanded recently, the importance of DC electric power system is emphasized. Furthermore, the study for systemization and standardization of design and operation technique in DC electric power system is undergoing nowadays. For these studies, the development of standard analysis model for metro railway electric power system is required. In this paper, a standard analysis model for metro railway electric power system which is using PSCAD/EMTDC program is developed. The developed model is explained and the validity is shown by using the case studies.