Numerical Analysis of the Current and Voltage Sharing Issues for Resistive Fault Current Limiter Using YBCO Coated Conductors
Numerical Analysis of the Current and Voltage Sharing Issues for Resistive Fault Current Limiter Using YBCO Coated Conductors
复制标题
DOI：
10.1109/tasc.2010.2091232
复制
发表时间：
2011-06
影响因子：
1.8
通讯作者：
Z. Hong;Z. Jin;M. Ainslie;J. Sheng;W. Yuan;T. Coombs
中科院分区：
文献类型：
--
作者：
Z. Hong;Z. Jin;M. Ainslie;J. Sheng;W. Yuan;T. Coombs
YBaCuO 涂层导体在超导故障限流器 (SFCL) 的性能和成本节约方面具有巨大潜力。基于涂层导体的电阻式 SFCL 可以由并联或串联连接的多条带制成。理想情况下，当失超发生时，电流和电压由带均匀共享。然而，由于胶带的性能不均匀以及胶带的相对位置，导致胶带的电流和电压不同。本文开发了一个数值模型来研究电阻 SFCL 的电流和电压共享问题。该模型能够模拟 YBCO 带材在正常和淬火条件下的动态响应。首先，将E-J幂律中具有不同Jc和n值的四个磁带并联以承载故障电流。该模型演示了电流如何在四个磁带之间分布。然后将这四根胶带串联起来以承受线路电压。在这种情况下，模型研究磁带之间的电压共享。讨论了影响失超过程的几个因素，包括 Jc 的场依赖性、带之间的磁耦合以及带的相对位置。
YBaCuO-coated conductors offer great potential in terms of performance and cost-saving for superconducting fault current limiter (SFCL). A resistive SFCL based on coated conductors can be made from several tapes connected in parallel or in series. Ideally, the current and voltage are shared uniformly by the tapes when quench occurs. However, due to the non-uniformity of property of the tapes and the relative positions of the tapes, the currents and the voltages of the tapes are different. In this paper, a numerical model is developed to investigate the current and voltage sharing problem for the resistive SFCL. This model is able to simulate the dynamic response of YBCO tapes in normal and quench conditions. Firstly, four tapes with different Jc's and n values in E-J power law are connected in parallel to carry the fault current. The model demonstrates how the currents are distributed among the four tapes. These four tapes are then connected in series to withstand the line voltage. In this case, the model investigates the voltage sharing between the tapes. Several factors that would affect the process of quenches are discussed including the field dependency of Jc, the magnetic coupling between the tapes and the relative positions of the tapes.