A theory of losses and loss measurements of superconducting power cables consisting of helically wound conductor tapes
Abstract
The ac losses of short prototypes (up to 100 m) of superconducting cables are usually measured electrically by multiplying the cable currents with the corresponding voltage drops and time averaging the products in an electronic wattmeter. With this method the losses of different parts of a cable can be measured by using appropriate voltage pickup probes to measure (1) the overall cable voltage; (2) the axial voltage drops of the inner and outer conductors respectively; (3) the voltage drop of the surface of a conductor tape; and (4) the losses of the shorted end. The axial and spiral probes, and their functions are discussed. A theory of losses and loss measurements of superconducting power cables consisting of helically wound conductor tapes is given for the single helix cable, double helix cable, and double helix cables with metallic core and stabilizer layers. Theoretical results using this theory are compared with experimental data from testing a 1 m cable and a 100 m cable.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1982
- Bibcode:
- 1982STIN...8330926S
- Keywords:
-
- Helical Windings;
- Power Lines;
- Superconducting Power Transmission;
- Transmission Loss;
- Voltmeters;
- Alternating Current;
- Computer Programs;
- Current Density;
- Equivalent Circuits;
- Electronics and Electrical Engineering