The Superconducting Fault Current Limiter (SFCL) is the superconducting device for electrical applications closest to overcoming the commercialization threshold. Device and operational costs due to resistive electrical connections and AC losses can be minimized by reducing superconducting tape length and power dissipation in the cryostat. Pursuing this goal, we realized anti-inductive coils of YBCO tapes without a copper stabilizing layer. The higher normal-state resistance allows considerable reduction of the necessary length, for the same current limitation factor. The focus of this work is on the soldering procedure and reinforcement of the superconducting tapes, particularly challenging when it is protected by only a 2 μm thin Ag layer. Our developed procedure enabled the realization of the successfully tested single phases of the 9-kV/15.6-MVA resistive SFCL, currently under development at Ricerca sul Sistema Energetico-RSE S.p.A.

Assembly and soldering procedure of non-stabilized YBCO coils for 1000 A SFCL

A. Li Bassi;C. S. Casari;
2018-01-01

Abstract

The Superconducting Fault Current Limiter (SFCL) is the superconducting device for electrical applications closest to overcoming the commercialization threshold. Device and operational costs due to resistive electrical connections and AC losses can be minimized by reducing superconducting tape length and power dissipation in the cryostat. Pursuing this goal, we realized anti-inductive coils of YBCO tapes without a copper stabilizing layer. The higher normal-state resistance allows considerable reduction of the necessary length, for the same current limitation factor. The focus of this work is on the soldering procedure and reinforcement of the superconducting tapes, particularly challenging when it is protected by only a 2 μm thin Ag layer. Our developed procedure enabled the realization of the successfully tested single phases of the 9-kV/15.6-MVA resistive SFCL, currently under development at Ricerca sul Sistema Energetico-RSE S.p.A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1077263
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