Optimal Design of Current Sharing in Transmission Conductors of a 110 kV/3 kA Cold Dielectric Superconducting Cable Consisted of YBCO Tapes
Optimal Design of Current Sharing in Transmission Conductors of a 110 kV/3 kA Cold Dielectric Superconducting Cable Consisted of YBCO Tapes
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DOI：
10.1109/tasc.2013.2244156
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发表时间：
2013-01
影响因子：
1.8
通讯作者：
Jiahui Zhu;Xuzheng Bao;Lijie Guo;Zhanjun Xia;M. Qiu;W. Yuan
中科院分区：
文献类型：
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作者：
Jiahui Zhu;Xuzheng Bao;Lijie Guo;Zhanjun Xia;M. Qiu;W. Yuan
冷介质高温超导（HTS）电缆具有多层传输导体以承载大电流。随着导体层数的增加，由于集肤效应引起的各导体层电流分布的不均匀性越来越大，导致损耗增加，传输性能变差。为了充分利用电缆中导体的性能，重要的是要了解层之间的电流共享机制。采用改进的粒子群优化算法，建立了以各导体层电流差最小为目标的优化设计模型。基于等效电路模型，对1 km、110 kV/3 kA YBCO超导带材均流冷介质高温超导电缆进行了优化设计。优化后导体层电流最大不平衡率为4.1%，屏蔽层内导体间电流分布均匀。对所设计的高温超导电缆的电流计算结果表明，电流在各层中分布均匀，从而验证了该优化设计方法的有效性。
A cold dielectric high-temperature superconducting (HTS) cable has multilayer transmission conductors to carry a large current. When the conductor layer number increases, the unevenly distributed currents caused by the skin effect in each conductor layer become more and more nonuniform, and would lead to the increased amount of loss and poorer transmission performance. In order to fully exploit the performance of conductors in cables, it is important to understand the current sharing mechanism between layers. An optimal design model for minimizing current difference in each conductor layer was proposed using an improved particle swarm optimization algorithm. A 1 km, 110 kV/3 kA cold dielectric HTS cable consisted of YBCO tapes and with current evenly sharing was optimally designed based on an equivalent circuit model. After optimization, we find that the maximum unbalanced rate of the current in conductor layers is 4.1% and there is a uniform current distribution among the conductors in shield layers. The current calculation result of the designed HTS cable shows the current is evenly shared in different layers and thus this optimal design method is validated.