AC Losses of Prototype HTS Transmission Cables

Conference · Sun Sep 13 04:00:00 EDT 1998

OSTI ID:6248

Demko, J A ^[1]; Dresner, L; Hughey, R L; Lue, J W; Olsen, S K; Sinha, U; Tolbert, J C

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1. ORNL

Since 1995 Southwire Company and Oak Ridge National Laboratory (ORNL) have jointly designed, built, and tested nine, l-m long, high temperature superconducting (HTS) transmission cable prototypes. This paper summarizes the AC loss measurements of five of the cables not reported elsewhere, and compares the losses with each other and with theory developed by Dresner. Losses were measured with both a calorimetric and an electrical technique. Because of the broad resistive transition of the HTS tapes, the cables can be operated stably beyond their critical currents. The AC losses were measured in this region as well as below critical currents. Dresner's theory takes into account the broad resistive transition of the HTS tapes and calculates the AC losses both below and above the critical current. The two sets of AC 10SS data agree with each other and with the theory quite welL In particular, at low currents of incomplete penetration, the loss data agree with the theoretical prediction of hysteresis loss based on only the outer two Iayers carrying the total current.

• Research Organization: Oak Ridge National Laboratory (ORNL); Oak Ridge, TN
• Sponsoring Organization: USDOE Office of Energy Research (ER)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 6248
• Report Number(s): ORNL/CP-102499; ON: DE00006248
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
AC Losses
High-Tc Superconductors
Superconducting Cables