Design, analysis, and fabrication of a tri-axial cable system
Design, analysis, and fabrication of a tri-axial cable system
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三轴电缆系统的设计、分析和制造
DOI：
10.1109/tasc.2003.812969
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发表时间：
2003
影响因子：
1.8
通讯作者：
J. Tolbert
中科院分区：
文献类型：
--
作者：
P. W. Fisher;M. Cole;J. Demko;C. A. Foster;M. Gouge;R. Grabovickic;J. Lue;J. Stovall;D. Lindsay;M. Rodén;J. Tolbert
受a /spl sim/1.5 m原型三轴电缆的积极测试结果的鼓舞，Southwire公司/橡树岭国家实验室（ORNL）团队构思、设计并建造了一个5米的三相终端三轴电缆。三个同心超导相由BSCCO-2223高温超导（HTS）带制成，由多层冷介质（CD）带隔开。增加铜编织带作为接地屏蔽。完成的三轴电缆被封装在一个柔性低温恒温器中。电缆和终端的冷却是通过液氮流经电缆和低温恒温器之间的环空来实现的。一个具有挑战性的分析和设计问题是在同心相之间开发和实现具有足够高的导热性的绝缘体材料，以满足温度梯度要求和可接受的机械性能（冷却时的强度和收缩）。由此产生的三相、CD电缆和终端设计几乎与之前由Southwire/ORNL开发的单相、同轴设计一样紧凑，并且代表了交流电力电缆中可以实现的最高电缆电流密度。
Encouraged by the positive test results of a /spl sim/1.5-m long prototype tri-axial cable, the Southwire Company/Oak Ridge National Laboratory (ORNL) team has conceived, designed, and built a 5-m tri-axial cable with three-phase terminations. The three concentric superconducting phases are made of BSCCO-2223 high-temperature superconducting (HTS) tapes, separated by layers of cold-dielectric (CD) tape. A copper braid is added as the grounding shield. The completed tri-axial cable is enclosed in a flexible cryostat. Cooling of the cable and terminations is achieved by liquid nitrogen flowing through the annulus between the cable and the cryostat. A challenging analysis and design problem was development and implementation of an insulator material between the concentric phases with high enough thermal conductivity to meet temperature gradient requirements and acceptable mechanical performance (strength and contraction on cool down). The resulting three-phase, CD cable and termination design is nearly as compact as the single-phase, co-axial design developed previously by Southwire/ORNL and represents the highest cable current density achievable in an electric alternating-current power cable.