Equal current distribution in parallel circuits of resistive superconducting fault current limiters using multiple superconducting inter-phase transformers
Equal current distribution in parallel circuits of resistive superconducting fault current limiters using multiple superconducting inter-phase transformers
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DOI：
10.1109/tasc.2005.849467
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发表时间：
2005-06
影响因子：
1.8
通讯作者：
J. Sim;Y. Choi;Hye-Rim Kim;O. Hyun
中科院分区：
文献类型：
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作者：
J. Sim;Y. Choi;Hye-Rim Kim;O. Hyun
超导并联电路在正常运行时的阻抗差异会导致电路中的电流分布不均匀，从而导致某些超导部件失超或损耗。然而，这些阻抗如此之小，以至于几乎无法控制。为了解决这一问题，尝试了将电阻或电感串联插入每个并联电路中的措施。这就留下了由于电阻或电抗造成的额外损失。在这项研究中，我们提出了一种用于超导并联电路等电流分布的多超导相间变压器(SIPT)，并对其性能进行了研究。利用BSCCO-2223高温超导带材的双薄饼绕组制作了SIPT，并将其应用于阻性超导故障限流器的并联电路中。结果表明，SIPT能有效地使电阻不相等的超导并联电路中的电流分布均匀。此外，空芯SIPTS的二次回路配置对于SFCL来说是最有效的。
Differences in impedances of the superconducting parallel circuits during normal operations cause unequal distribution of currents in the circuits, resulting in quench or loss in certain superconducting parts. However, those impedances are so small that they are hardly controllable. To solve this problem, attempted were such measures as inserting resistors or inductors into each of the parallel circuits in series. This leaves extra losses due to resistance or reactance. In this study, we proposed a multiple superconducting inter-phase-transformers (SIPT) for the equal current distribution in superconducting parallel circuits and investigated their performance. SIPTs were fabricated using double pancake windings of BSCCO-2223 HTS tapes and were applied to parallel circuits of resistive superconducting fault current limiters (SFCLs). Results showed that the SIPTs effectively made the current distribution uniform in superconducting parallel circuits that had unequal resistances. In addition, the secondary loop configuration with air-core SIPTs was suggested as the most efficient for the SFCLs.