Electromagnetic behavior of a superconducting power cable

Author

Däumling, Manfred

Author_Institution

NKT Res., Brundby, Denmark

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

2146

Lastpage

2149

Abstract

The electromagnetic behavior of a superconducting power cables consisting of a layered structure is described using a circuit model. Ingredients for the model are the voltage current characteristics of the tapes used to make the cable, and the self and mutual inductances of the layers. Current and voltage wave shapes are calculated numerically as a function of externally applied AC. This is shown, quantitatively for a 4 layer cable with alternating pitch of +/- 0.3 m. Saturation losses are computed simply by multiplying voltage and current. Due to the nonlinear VI characteristics of the layers, layer currents becomes nonsinusoidal in the vicinity of the layer critical current. However, if the current is below the critical current of the whole cable these nonlinearities appear to cancel and the overall current shape remains sinusoidal

Keywords

circuit simulation; critical current density (superconductivity); inductance; losses; power cables; superconducting cables; superconducting tapes; alternating pitch cable; circuit model; current and voltage wave shapes; electromagnetic behavior; layer critical current; layered structure; mutual inductances; nonlinear VI characteristics; nonsinusoidal layer currents; saturation losses; superconducting power cable; superconducting tapes; voltage current characteristics; voltage wave shapes; Circuits; Critical current; Power cables; Resistors; Shape; Superconducting cables; Superconducting epitaxial layers; Superconducting films; Superconductivity; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.920282

Filename

920282