Design of the Electromagnetic Repulsion Mechanism and the Low-Inductive Coil Used in the Resistive-Type Superconducting Fault Current Limiter

A 2-D finite-element model of the fast electromagnetic repulsion mechanism is presented in Ansoft Maxwell, and the variation characteristics of the movement accompanies to different parameters are analyzed in transient field. Then an electromagnetic repulsion mechanism with a spring damper is designed. This mechanism is used in a resistive-type superconducting fault current limiter (SFCL). A low-inductive YBCO superconducting coil is designed to reduce the reactive power loss when the circuit is in the normal state. The maximum value of the B around the coil is calculated with COMSOL Multiphysics to determine the critical current of the superconducting tape. These two parts are the main component of the SFCL.