Stability Analysis of HTS Power Cable With Fault Currents
Stability Analysis of HTS Power Cable With Fault Currents
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DOI：
10.1109/tasc.2010.2084552
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发表时间：
2011-06
影响因子：
1.8
通讯作者：
M. Furuse;S. Fuchino;K. Agatsuma;T. Masuda;M. Ohya;S. Honjo;T. Mimura;Y. Noguchi
中科院分区：
文献类型：
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作者：
M. Furuse;S. Fuchino;K. Agatsuma;T. Masuda;M. Ohya;S. Honjo;T. Mimura;Y. Noguchi
数值计算了高温超导（HTS）模型电缆故障时过冷液氮流动的瞬态温度分布。冷却剂和电缆芯的温度通过使用有限差分法数值求解热方程来计算。在计算中，我们假设流动的过冷液氮和电缆芯表面之间的传热系数由Dittus-Boelter关联式描述。计算结果表明，即使在故障已被删除后，冷却剂的温度增加，它继续增加，直到新鲜的冷却剂从入口到达。计算得到的冷却剂温度分布与在模型高温超导电缆上进行过电流试验得到的测量数据吻合良好。使用我们的计算代码，我们还评估了最大HTS电缆长度，确保冷却剂保持在液相中的HTS模型电缆的某些故障电流。
We numerically calculated the transient temperature distribution of flowing subcooled liquid nitrogen in a high-Tc superconducting (HTS) model cable when faults occur. The coolant and cable core temperatures were calculated by numerically solving the heat equation using the finite difference method. In the calculation, we assume that the heat transfer coefficient between the flowing subcooled liquid nitrogen and the cable core surface is described by the Dittus-Boelter correlation. The calculation results reveal that the coolant temperature increases even after the fault has been removed and that it continues increasing until fresh coolant arrives from the inlet. The calculated temperature profile of the coolant agrees well with measured data obtained by conducting over-current tests on a model HTS cable. Using our computational code, we also evaluated the maximum HTS cable lengths that ensure that the coolant remains in the liquid phase for certain fault currents for an HTS model cable.