200 kA DC Busbar Demonstrator DEMO 200 - Conceptual Design of Superconducting 20 kA Busbar Modules Made of HTS CroCo Strands

The High Temperature Superconductor (HTS) material REBCO provides high critical currents even when being cooled with liquid nitrogen (LN 2 ) to T ∼ 70-77 K. Therefore, it is considered in the design of energy-efficient superconducting busbar solutions for industrial high-current application such as...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2022-06, Vol.32 (4), p.1-7
Main Authors: Wolf, Michael J., Fietz, Walter H., Heiduk, Mathias, Huwer, Stefan, Kienzler, Andreas, Schlachter, Sonja I., Vogel, Thomas
Format: Article
Language:English
Subjects:
2G–HTS
Aluminum
busbar
Busbars
Conceptual design
Copper
Critical current (superconductivity)
DC application
DC power transmission
Electrochemical processes
Electrolysis
Electromagnetics
High temperature superconductors
Liquid nitrogen
Modules
REBCO
Research projects
Strands
Superconducting magnets
Superconducting tapes
Superconductivity
Thermal expansion
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The High Temperature Superconductor (HTS) material REBCO provides high critical currents even when being cooled with liquid nitrogen (LN 2 ) to T ∼ 70-77 K. Therefore, it is considered in the design of energy-efficient superconducting busbar solutions for industrial high-current application such as electrolysis. The research project DEMO 200 aims to demonstrate a modular, superconducting, LN 2 -cooled 200 kA DC busbar for an aluminum electrolysis plant. Within that project, the electromagnetic design and analysis of a round arrangement of twelve individual compact HTS CrossConductor (HTS CroCo) strands is carried out. The HTS CroCo strands are fabricated from REBCO tapes of 2 mm and 3 mm width. For the electromagnetic design of the modules and busbar, the angular field dependence of the critical current of the REBCO material was characterized at relevant temperature and field ranges. The data is used as an input for an electromagnetic model to determine the required amount of REBCO to achieve the target critical current in the modular 200 kA busbar. For a sub-scale test of one module at T = 77 K, the expected critical currents are calculated to allow for the assessment of measured critical currents. In order to compensate the thermal expansion during cooldown to operational temperature, a concept based on the reduction of the amplitude of sinusoidal arrangement of HTS CroCo strands along a cylinder barrel is proposed and investigated with respect to its electromechanical boundaries.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2022.3152130