Comparison of a Self-Limiting Transformer and a Transformer Type FCL with HTS Elements

摘要

A superconducting fault current limiter of the transformer type (inductiveFCL) based on magnetic coupling between a superconducting element and aprotected circuit has been investigated by many authors for various parametersand performances of a superconducting element. Another design of the devicepreventing high short-circuit currents is a self-limiting transformer combiningthe functions of a usual power transformer with the functions of a currentlimiter. In the presented work we compare the parameters, operation andapplication of these two devices. The operation of the devices is investigatedexperimentally on small models fabricated using the same superconductingelement. The parameters of the full-scale devices are evaluated. It is shownthat the requirements to superconducting elements are practically the same forboth devices.