REBCO FCL Modelling: Influence of Local Critical Current Non-Uniformities on Overall Behavior for Various Tape Architectures

Badel, Arnaud; Escamez, Guillaume; Tixador, Pascal

doi:10.1109/tasc.2014.2371926

Cited by 10 publications

(9 citation statements)

References 8 publications

(9 reference statements)

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“…Conventional materials used to increase the heat capacity of the tape are brass, stainless steel or Hastelloy in compact [13][14][15] or porous form [16]. Drawback of these materials is their electrical conductivity, which reduces electrical resistivity of the tape and causes that more heat is generated at the same level of electric field [17].…”

Section: Introductionmentioning

confidence: 99%

Composite Heat Sink Material for Superconducting Tape in Fault Current Limiter Applications

et al. 2020

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We enhanced the performance of superconducting tapes during quenching by coating the tapes with various composites, with regards to the application of such coated systems in superconducting fault current limiters. In composition of the coating, we varied the type of epoxy matrix, the content of ceramic filler particles and the use of reinforcement in order to optimize the thermal and the mechanical stability of the coated tapes. By this way modified superconducting tapes were able to reduce the maximum temperature 170 °C of not modified superconducting tape to 55 °C during the quench with electric field up to 130 V m−1.

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Section: Introductionmentioning

confidence: 99%

Composite Heat Sink Material for Superconducting Tape in Fault Current Limiter Applications

et al. 2020

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“…This same approach has already been used successfully for modeling the behavior of resistive superconducting fault current limiters [25,26].…”

Section: Modeling Approachmentioning

confidence: 99%

“…The Newton-Raphson algorithm, whose convergence depends drastically on initialization, is therefore not efficient in this implementation. A basic iterative scheme with over-damping [25] becomes faster on average, but still requires several tenths of iterations.…”

Section: Limitations In the Use Of An External Function In Comsol ®mentioning

confidence: 99%

Modeling of ‘quench’ or the occurrence and propagation of dissipative zones in REBCO high temperature superconducting coils

Badel

Rozier

Ramdane

et al. 2019

Supercond. Sci. Technol.

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Thanks to their very high current carrying capabilities even under high magnetic field conditions and their outstanding mechanical properties, high temperature superconductors (HTSs) such as REBCO (rare-earth BaCuO) tapes are very attractive for high magnetic field applications. Depending on the magnet design goals and constraints, it can be advantageous in some cases to reduce the electrical margins of the conductor. Considering the uncertainty in locally evaluating the critical current, and the inhomogeneities of present-day REBCO tapes, there is a significant risk of the critical current being overstepped locally, thus triggering local damaging hotspots. Such an event does not have the sudden occurrence and/or fast spreading quality usually associated with the concept of 'quench' and should be simply seen as thermal runaway induced by dissipative zones (DZs). The development of numerical models to evaluate the occurrence and propagation of such zones inside windings is critical in the development of a HTS magnet fully using REBCO tape performance while guaranteeing safe operation conditions. In this work, we have developed a transient electro-thermal model adapted to pancake-based coils. It accounts for both the nonlinear electrical and thermal behavior of the material and considers the local inhomogeneities of the critical current I c along the tape. The electrical part is one-dimensional (1D) and computes the nonlinear dissipation in the conductor depending on the local operation conditions while the thermal part is two-dimensional (2D) to account for the heat propagation along the conductor length and from turn to turn. In order to improve computation efficiency, adaptive time-stepping methods have been introduced with the objective of ensuring good accuracy of simulation results.

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“…We want to go further with an objective of 300 VRMS/m. The conductor developed in FASTGRID derives from previous works on conductor optimization for SFCL [5,6]. Within FASTGRID a solution using REBCO tape based on a sapphire tape substrate is also investigated.…”

Section: Introductionmentioning

confidence: 99%

Stabilizers for REBCO Conductors for High Performance SFCL

Tixador,

Vialle,

Zampa

et al. 2023

IEEE Trans. Appl. Supercond.

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REBCO FCL Modelling: Influence of Local Critical Current Non-Uniformities on Overall Behavior for Various Tape Architectures

Cited by 10 publications

References 8 publications

Composite Heat Sink Material for Superconducting Tape in Fault Current Limiter Applications

Composite Heat Sink Material for Superconducting Tape in Fault Current Limiter Applications

Modeling of ‘quench’ or the occurrence and propagation of dissipative zones in REBCO high temperature superconducting coils

Stabilizers for REBCO Conductors for High Performance SFCL

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