변전소 공유를 통한 직류 도시철도 시스템 회생에너지 이용률 향상과 요금 절감 분석

초록

This paper deals with the power integration of large urban railway systems to improve regenerative energy utilization. Current regenerative energy utilization is low because there is no special plan for using this energy. If the railway system is integrated with other railway systems, the efficiency is expected to be improved. Through the case studies, to find the realistic effect of integrated operation, real system for the Seoul Metro lines, especially line 5 and 7, had been applied. Also, evaluation for the electricity cost saving had been performed by using KEPCO electricity cost table.