Efficient Multiphysics Finite Element Simulation of a Transient Fault in a Bi-2223 HTS Power Cable
Efficient Multiphysics Finite Element Simulation of a Transient Fault in a Bi-2223 HTS Power Cable
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DOI：
10.1109/tasc.2021.3074470
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发表时间：
2021-06
影响因子：
1.8
通讯作者：
A. A. Petrov-A.;I. Golosnoy;J. Pilgrim
中科院分区：
文献类型：
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作者：
A. A. Petrov-A.;I. Golosnoy;J. Pilgrim
本文讨论了高温超导电缆（HTSC）对瞬态短路故障的响应和恢复问题，并给出了该问题的有限元解。完整的模型由三个子程序组成，它们相互连接：1)htsc中的电磁现象和相关的焦耳热释放；2) HTSC向冷却回路的传热；3)液氮对流热输运。这些子程序通过几何和变量耦合连接起来。给出了待建模电缆的真实背景及其关键特性。详细说明了最重要的参数和变量的计算。为了通过在选定的时间间隔内操纵活动物理来促进计算速度，模拟分为三个不同的阶段：稳态、瞬态故障和恢复。此外，它还展示了如何在适度合理的时间内使用较低的计算资源执行整个模拟，当某些近似被开发时，即仅在沿电缆的有限数量的横截面上使用电磁模型。本文表明，即使没有访问计算集群，在办公PC上使用商业有限元软件也可以获得相当准确的结果，并且可以使用相同的模型来检查正常和瞬态操作。
In this article, the problem of a high temperature superconducting cable (HTSC) response to and recovery from a transient short circuit fault is discussed and a finite element solution to the problem is presented. The full model consists of three subroutines, connecting together: 1) electromagnetic phenomena in HTSCs and associated Joule heat release; 2) heat transfer from the HTSC to the cooling circuit; 3) convective heat transport in liquid nitrogen. These subroutines are connected via geometric and variable couplings. The background of the real cable to be modeled is laid out together with its key properties. The most important parameter and variable calculations are explained in detail. In order to facilitate a computational speedup through manipulation of the active physics during selected intervals of time, the simulation is split in three distinct stages—steady state, transient fault, and recovery. Moreover, it was shown how the entire simulation may be performed over a moderately reasonable amount of time using low computational resources when certain approximations are exploited—namely, using the electromagnetic model only on a limited number of cross sections along the cable. This article shows that fairly accurate results can be achieved on an office PC using a commercial FEM software even without access to computing clusters, and that the same model can be used to examine both normal and transient operation.