AC loss reduction of outer-diameter-fixed superconducting power transmission cables using narrow coated conductors

► Narrow 2-mm coated conductors are testified to be effective for AC loss reduction. ► Both monolayer and multilayer cables are discussed. ► Various lateral Jc distributions and load rates are applied in all cables. ► Distribution of AC loss reduction among layers in multilayer cables is analyzed. A...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2013-01, Vol.484, p.217-222
Main Authors: Li, Q., Amemiya, N., Nishino, R., Nakamura, T., Okuma, T.
Format: Article
Language:English
Subjects:
AC loss
Alternating current
Applied sciences
Cables
Conductors
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
Finite element method
Fixed diameter
Jc distribution
Mathematical models
Monolayer and multilayer
Multilayers
Narrow coated conductor
Power networks and lines
Reduction
Superconducting power transmission
Superconducting power transmission cable
Theory. Simulation
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Summary:► Narrow 2-mm coated conductors are testified to be effective for AC loss reduction. ► Both monolayer and multilayer cables are discussed. ► Various lateral Jc distributions and load rates are applied in all cables. ► Distribution of AC loss reduction among layers in multilayer cables is analyzed. AC loss reduction of superconducting power transmission cables is of great importance to promote their application in power grids. To meet certain installation conditions, cables are required to be designed with fixed outer diameters. This paper focuses on outer-diameter-fixed monolayer and multilayer (2-layer and 4-layer) superconducting power transmission cables constructed with coated conductors. Detailed numerical analysis of their AC loss reduction by replacing generally used 4-mm wide coated conductors with 2-mm wide narrow ones are presented. A 2-D FEM numerical model was developed to calculate AC losses of the cables. For detailed and comprehensive analysis, a series of variable parameters, such as number of layers, critical current density (Jc) distributions of coated conductors and load rate, are varied at well selected values to study their influences on the AC loss reduction. It is obtained and testified that 2-mm wide narrow coated conductors can effectively reduce AC losses in both monolayer and multilayer cables, even though more gaps are introduced. The knowledge presented is helpful for designing and fabricating practical cables.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2012.02.033