Abstract
A superconducting power cable is a prospective application of high-temperature superconductors. Even though superconducting power cables have been developed worldwide mainly for the grid application, we focus on railway application of superconducting power cables. We have studied the fault current of DC electric railway feeding systems using superconducting power cables. MATLAB-Simulink electric circuit models based on a model railway line are constructed for numerical analysis of short-circuit and grounding faults. Influence of introducing superconducting power cables under different fault conditions is studied. Then the protections in an electric power system of railway are taken into account, and the feasibility for detaching the fault and protecting the system including the superconducting power cables are studied. Application of a superconducting fault current limiter is also studied and its potential is discussed.
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