Cooling System of Superconducting Cables for Railway Systems

Abstract

DC electric railway systems are widely used in Japan, including in metropolitan areas. However, they have some problems, such as limited use of regenerative brakes and energy losses. In order to solve those problems, and to attain the energysavings essential for next-generation electric railway systems, we have been studying the feasibility of applying superconducting power cables to DC electric feeder systems. In this study, the design and specifications of a cooling system which are required for the superconducting cables for railway systems are shown.