Theory of ac loss in power transmission cables with second generation high temperature superconductor wires

Journal Article · Mon Feb 22 04:00:00 EST 2010 · Superconductor Science and Technology

DOI:https://doi.org/10.1088/0953-2048/23/3/034014· OSTI ID:976055

Clem, J. R.; Malozemoff, A. P.

While a considerable amount of work has been done in an effort to understand ac losses in power transmission cables made of first generation high temperature superconductor (HTS) wires, use of second generation (2G) HTS wires brings in some new considerations. The high critical current density of the HTS layer in 2G wires reduces the surface superconductor hysteretic losses, for which a new formula is derived. Instead, gap and polygonal losses, flux transfer losses in imbalanced two-layer cables and ferromagnetic losses for wires with NiW substrates constitute the principal contributions. A formula for the flux transfer losses is also derived with a paramagnetic approximation for the substrate. Current imbalance and losses associated with the magnetic substrate can be minimized by orienting the substrates of the inner winding inward and the outer winding outward.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11358
• OSTI ID: 976055
• Report Number(s): IS-J 7548
• Journal Information: Superconductor Science and Technology, Journal Name: Superconductor Science and Technology Journal Issue: 3 Vol. 23; ISSN 0953-2048
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
AC LOSSES
APPROXIMATIONS
CABLES
CRITICAL CURRENT
POWER TRANSMISSION
SUBSTRATES
SUPERCONDUCTORS