Application of Electrical and Calorimetric Methods to the A.C. Loss Characterization of Cable Conductors
Due to the higher currents (and therefore higher losses) compared to individual wires and tapes, the ac loss characterization of HTS cable conductors carrying transport current can be performed using calorimetric as well as electrical methods. We discuss the main features of two calorimetric methods, one based on temperature profile determination, and one, more recently developed, based on nitrogen boil-off rate, and of the electrical method, substantially derived from that already established for tapes, based on voltage measurement by a Lock-In amplifier. Advantages and limits of each approach are analyzed and compared. Tests have been carried out with the three methods on samples 1 to 1.5 m long cut from a Bi-2223 cable conductor prototype fabricated by Pirelli in a longer length. Results obtained from measurements covering a wide range of currents are compared and thoroughly discussed.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EE) (US)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 760125
- Report Number(s):
- LA-UR-98-4108; TRN: AH200037%%210
- Resource Relation:
- Conference: Applied Superconductivity Conference, Palm Desert, CA (US), 09/13/1998--09/18/1998; Other Information: PBD: 13 Sep 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Testing of an HTS Power Cable Made from YBCO Tapes
Development and demonstration of a high temperature superconducting power transmission cable system