인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록·키워드
Energy consumption in urban railway operations is primarily attributed to traction power and facility electricity. Electricity used for passenger amenities, lighting, and ancillary systems constitutes over 95% of total operational energy, with train traction alone accounting for approximately 70%. In domestic urban rail networks, about 80% of the system consists of underground sections, where the lack of natural lighting further intensifies electricity demand. Following a transitional phase that employed a combination of resistance, chopper, and VVVF (Variable Voltage Variable Frequency) control, the system has now achieved full adoption of VVVF technology. This study investigates the effectiveness of train regenerative braking and energy storage systems (ESS), alongside their influence on catenary voltage and power system performance, using data from two main substations and one depot substation operated by a domestic railway company. Based on these analyses, the paper assesses the appropriateness of protective coordination settings between rolling stock and the traction power system. The findings suggest that the inverter low-voltage protection setting for overhead lines (850V±10%) in VVVF-based electric vehicles requires reassessment. Furthermore, enhancing the capacity of surge arresters (S/A) is recommended to improve substation energy efficiency, stabilize overhead line voltage, and reinforce system protection. Finally, the study emphasizes the need for continued research into the reuse of energy storage systems and highlights the importance of technical advancements by rolling stock manufacturers to minimize voltage control deviations, ensuring reliable operation of inverter-based voltage reduction systems at a DC overhead line voltage of 1,800V.
본문·목차
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