Multiphysics Finite Element Modelling of the Fault Response and Recovery of First Generation Superconducting Cables

了解超导电缆的故障响应对于它们的广泛应用是很重要的。特别是，了解电缆的额定值和空间设计将如何影响其故障响应和在特定电网中发生高贯通故障过电流后的恢复时间，这是非常有用的。要做到这一点，必须建立可靠的建模技术。将在COMSOL中对电缆进行详细的电磁和热模拟。该模型将由一个耦合的样本电网模型在MATLAB中进行补充。到目前为止，已经成功地建立了Bi2223超导带随磁场变化的数值模型。利用该模型对Bi2223带材提出并验证了两种均匀化技术，这两种方法通过简化几何结构来减少计算时间。未来的工作将包括引入一个热模型，并将问题扩展到电缆水平。

Understanding the fault response of superconducting cables is important to their wider adoption. In particular, it is useful to understand how the cable's rating and spatial design would influence both its fault response and time of recovery after a high through fault overcurrent in a particular grid. To achieve that, reliable modelling techniques must be established. A detailed electromagnetic and thermal modelling of a cable will be performed in COMSOL. This modelling will be complemented by a coupled sample power grid model in MATLAB. So far, a successful numerical model of magnetic field dependent behaviour of a Bi-2223 superconducting tape has been demonstrated. This model has been used to propose and verify two homogenization techniques for Bi-2223 tapes that decrease the computation time by simplifying the geometry. Future work will include introducing a thermal model and scaling the problem to cable level.