Application of electrical and calorimetric methods to the AC loss characterization of cable conductors
Application of electrical and calorimetric methods to the AC loss characterization of cable conductors
复制标题
电学和量热方法在电缆导体交流损耗表征中的应用
DOI：
10.1109/77.783478
复制
发表时间：
1999
影响因子：
1.8
通讯作者：
S. Zannella
中科院分区：
文献类型：
--
作者：
G. Coletta;L. Gherardi;F. Gomory;E. Cereda;V. Ottoboni;D. Daney;M. Maley;S. Zannella
由于与单独的电线和胶带相比更高的电流（并且因此更高的损耗），承载传输电流的HTS电缆导体的AC损耗表征可以使用量热法以及电学方法来执行。我们讨论了两种量热方法的主要特点，一种是基于温度分布的确定，一种是基于氮的蒸发速率，以及电学方法，基本上来自于已经建立的磁带，基于锁定放大器的电压测量。分析和比较了每种方法的优点和局限性。用这三种方法对从倍耐力制造的Bi-2223电缆导体原型上切下的1至1.5m长的样品进行了较长长度的测试。比较并彻底讨论了涵盖广泛电流范围的测量结果。
Due to 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 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 analysed 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.