Temperature and Pressure Simulation of a High-Temperature Superconducting Cable Cooled by Subcooled $\mbox{LN}_2$ With Fault Current
Temperature and Pressure Simulation of a High-Temperature Superconducting Cable Cooled by Subcooled $\mbox{LN}_2$ With Fault Current
复制标题
故障电流过冷 $mbox{LN}_2$ 冷却的高温超导电缆的温度和压力仿真
DOI：
10.1109/tasc.2014.2387119
复制
发表时间：
2015
影响因子：
1.8
通讯作者：
A. Ishiyama
中科院分区：
文献类型：
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作者：
Yusuke Sato;K. Agatsuma;Xudong Wang;A. Ishiyama
我们开发了计算机模拟来估计由过冷液氮强制流动冷却的高温超导 (HTS) 电力电缆中的瞬态温度和压力分布。该模拟对于评估实际高温超导电力电缆短路事故的影响至关重要。当故障发生时，电缆中可能会流过 31.5 kA 的过大电流并持续 2 s，因此了解这些故障发生时由 LN2 强制流动冷却的电缆中的温度和压力分布非常重要，直到扰动从电缆流出。通过使用有限差分法求解热传导和传热方程，分析了液氮冷却剂和电缆芯的温度分布。 Cryodata GASPAK 软件包用于估计流体特性。仿真结果与实验结果吻合较好。通过采用新型感应制冷系统和循环泵模型，解决了模拟与实验之间压力的微小差异。分析结果表明，电缆中的压力显着变化，具体取决于端子中的初始气体体积和从电缆中的铜管蒸发的液氮气体的体积。
A computer simulation has been developed to estimate the transient temperature and pressure distributions in a high-temperature superconducting (HTS) power cable cooled by a forced flow of subcooled LN2. This simulation is critical for assessing the effects of short-circuit accidents in practical HTS power cables. When a fault occurs, an excessive current of 31.5 kA may flow in a cable for 2 s, and it is important to understand the temperature and pressure profiles in a cable cooled by the forced flow of LN2 when these faults occur until the disturbance flows out from a cable. The temperature profile of the LN2 coolant and the cable cores was analyzed by solving heat conduction and heat transfer equations using the finite-difference method. The Cryodata GASPAK software package was used to estimate the fluid properties. The simulation results show a fairly good agreement with the experimental results. By employing a new model of the induction refrigeration system and the circulation pump, a small discrepancy is resolved in pressures between simulation and experiment. The analysis results show that the pressure in the cable significantly changes depending on the initial gas volumes in the terminals and the volume of the LN2 gas that evaporates from the copper former in the cable.
用于下一代电能系统的前沿超导线材的开发
DOI：
--
发表时间：
2018
期刊：
影响因子：
--
作者：
Lin Nyan;Kurkoski Brian M.;TAN Yasuo;LIM Yuto;Takanobu Kiss
通讯作者：
Takanobu Kiss