AC loss characteristics of superconducting power transmission cables: gap effect and J(c) distribution effect

作者：Li Quan^*; Amemiya Naoyuki; Takeuchi Katsutoku; Nakamura Taketsune; Fujiwara Noboru

来源：Superconductor Science and Technology, 2010, 23(11): 115003.

DOI：10.1088/0953-2048/23/11/115003

Four groups of superconducting power transmission cables composed of coated conductors with 4.0 mm width and 2 mu m superconductor thickness have been designed, including mono-layer, two-layer, four-layer and six-layer cables. In each group, three types of cables have been constructed with gaps of different size between adjacent coated conductors, which are classified into small gap, medium gap and large gap. Moreover, different lateral critical current density (J(c)) distributions, specifically a uniform distribution and a trapezoidal distribution with a sloping shoulder, have been assumed while calculating the AC losses of these cables numerically by using a one-dimensional FEM model. Numerical results show that AC losses in mono-layer cables are significantly influenced by gaps between coated conductors as well as lateral J(c) distribution, while cables with many layers are hardly affected by them. This proves that small gaps between coated conductors are not absolutely essential to reduce AC losses in multi-layer cables, and a sloping shoulder of the J(c) distribution is more allowable in multi-layer cables than in mono-layer cables. The AC loss distr

• 出版日期2010-11