Calculation of alternating current losses in stacks and coils made of second generation high temperature superconducting tapes for large scale applications
Victor M. R. Zermeno,Asger Bech Abrahamsen,Nenad Mijatovic,Bogi Bech Jensen,Mads Peter Sørensen +4 more
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TLDR
In this article, a homogenization method to model a stack of second generation High Temperature Superconducting tapes under AC applied transport current or magnetic field has been obtained, where the idea is to find an anisotropic bulk equivalent for the stack such that the geometrical layout of the internal alternating structures of insulating, metallic, superconducting, and substrate layers is washed out while keeping the overall electromagnetic behavior of the original stack.Abstract:
A homogenization method to model a stack of second generation High Temperature Superconducting tapes under AC applied transport current or magnetic field has been obtained. The idea is to find an anisotropic bulk equivalent for the stack such that the geometrical layout of the internal alternating structures of insulating, metallic, superconducting, and substrate layers is “washed” out while keeping the overall electromagnetic behavior of the original stack. We disregard assumptions upon the shape of the critical region and use a power law E–J relationship allowing for overcritical current densities to be considered. The method presented here allows for a computational speedup factor of up to 2 orders of magnitude when compared to full 2-D simulations taking into account the actual dimensions of the stacks without compromising accuracy.read more
Citations
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Simulation of superconducting tapes and coils with convex quadratic programming method
TL;DR: In this paper, the ability and possible potential of J formulation from the mathematical modeling point of view was explored and a relation between electromagnetic quantities and Karush-Kuhn-Tucker (KKT) conditions in optimization theory has been discovered.
Journal ArticleDOI
Current-Carrying Capability and Magnetic Behavior of the HTS Twisted Stacked-Tape Conductor Cable for the Compact Fusion Reactor
TL;DR: In this paper , three specific twisted stacked tape conductor (TSTC) cables with the same twist pitch have been designed and numerical studies of current-carrying capability and magnetic behavior of these cables have been carried out by employing a T-A formulation model and a H-homogenized formulation model which are based on the finite element method.
Dissertation
Numerical modelling of superconducting power cables with second generation high temperature superconductors
Posted Content
T-A homogenized and multi-scale models with real-time simulation capabilities for large-scale HTS systems
TL;DR: A series of adaptations to the homogenization and multi-scale methodologies in order to allow their implementation to the T-A formulation models are proposed and validated by means of comparing them with the H reference model of a racetrack coil.
Journal ArticleDOI
Magnetization of the joint-free high temperature superconductor (RE)Ba2Cu3Ox coil by field cooling
TL;DR: In this article, a joint-free pancake coil is wound by REBCO tapes and an approximate numerical model based on H-formulation is built for this coil to analyze its magnetization behavior, which is validated by the experimental results Analysis show that a persistent direct current is induced in the coil during the field cooling operation, which generates the trapped field.
References
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Book
The Finite Element Method in Electromagnetics
TL;DR: The Finite Element Method in Electromagnetics, Third Edition as discussed by the authors is a leading textbook on the finite element method, incorporating major advancements and further applications in the field of electromagnetic engineering.
Journal ArticleDOI
Magnetization and Critical Supercurrents
TL;DR: In this paper, a critical current density relation alpha /J = B/sub 0/ + B is deduced for Nb/sub 3/Sn and 3Nb-Zr.
Journal ArticleDOI
Numerical solution of critical state in superconductivity by finite element software
TL;DR: In this paper, a numerical method is proposed to analyse the electromagnetic behavior of systems including high-temperature superconductors (HTSCs) in time-varying external fields and superconducting cables carrying AC transport current.
Journal ArticleDOI
Development of an edge-element model for AC loss computation of high-temperature superconductors
TL;DR: In this article, a new numerical model for computing the current density, field distributions and AC losses in superconductors is presented, based on the direct magnetic field H formulation without the use of vector and scalar potentials.
Book
Computational Electromagnetism: Variational Formulations, Complementarity, Edge Elements
TL;DR: In this article, the Scalar Magnetic Potential (SGP) approach is used to solve the problem of approximating the SGP with respect to the Wasserstein equation. But this approach is not suitable for all applications.