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저압직류 배전계통의 구성 형태를 고려한 공급신뢰도 분석에 관한 연구
김충모(Chung-Mo Kim),노철호(Chul-Ho No),한준(Joon Han),오윤식(Yun-Sik Oh),김현수(Hyun-Soo Kim),백인호(In-Ho Baek),김철환(Chul-Hwan Kim) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.2
At the end of the 19th century, Edison’s DC power system and Tesla’s AC power system was debated in power market. Finally, AC system became the primary system of the power market because both step-up and step-down of voltage by using transformer and long-distance power transmission are easily possible. However, nowadays the power market takes some action for introducing DC system. Both domestic and foreign researchers are conducting the study on the DC system as well. Some researchers have conducted the studies on power quality and economic evaluation of the DC distribution system but DC distribution system is still controversial in terms of the effectiveness and reliability. In this paper, we calculate the reliability indices of the Low Voltage Direct Current(LVDC) distribution system considering arrangement of power electronics, layout of the distribution system, and distance between load points.
노철호(Chul-Ho Noh),김충모(Chung-Mo Kim),김두웅(Doo-Ung Kim),권기현(Gi-Hyeon Gwon),오윤식(Yun-Sik Oh),한준(Jun Han),김철환(Chul-Hwan Kim) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.4
Recently, DC-based power system is being paid attention as the solution for energy efficiency. As the example, HVDC (High Voltage DC) transmission system is utilized in the real power system. On the other hand, researches on LVDC (Low Voltage DC) distribution system, which are including digital loads, are not enough. In this paper, reliability in LVDC distribution system is analyzed according to the specific characteristics such as the arrangement of DC/DC converters and the number of poles. Furthermore, power quality is also taken account of since LVDC distribution system includes multiple sensitive loads and electric power converters. In order to achieve this, LVDC distribution systems are modeled using ElectroMagnetic Transient Program (EMTP) and both the minimal cut-set method and Customer Interruption Cost (CIC) are used in the reliability analysis.