Reduction of insulation thickness and AC loss in a superconducting cable under lightning-surge-free circumstances

[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials Pub Date : 1991-07-08 DOI:10.1109/ICPADM.1991.172088

Y. Kito, N. Hayakawa, T. Sakai, H. Okubo

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引用次数: 1

Abstract

When a large amount of electric power is directly supplied through superconducting power cables from a satellite power plant to a future computer-based city center, they can be operated under lightning-surge-free circumstances. The insulation thickness necessary to withstand a lightning surge is left out of the consideration of such a condition. The authors point out that the reduction of insulation thickness is very effective in helping decrease not only the AC loss, but also the total transmission loss in the superconducting cable. Quantitative investigations are carried out with respect to a liquid-nitrogen-cooled high-T/sub c/ superconducting cable. A reduction of 20-30% of the insulation thickness is shown to result in a decrease of 15% of the total loss for a 3000-MVA, 275-kV cable. For a transmission capacity of 5000 MVA the reduction rate of the total transmission loss of a 275-kV superconducting cable is 35%.<>

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减少无雷击浪涌环境下超导电缆的绝缘厚度和交流损耗

当大量电力通过超导电力电缆从卫星发电厂直接供应到未来以计算机为基础的城市中心时，它们可以在无雷击浪涌的情况下运行。在考虑这种情况时，不考虑承受雷击浪涌所必需的绝缘厚度。作者指出，减小绝缘厚度不仅可以有效地降低超导电缆的交流损耗，而且可以有效地降低超导电缆的总传输损耗。对液氮冷却高温度/低温/超导电缆进行了定量研究。对于3000mva, 275kv电缆，减少20-30%的绝缘厚度可以减少15%的总损耗。当输电容量为5000mva时，275 kv超导电缆的总传输损耗降低率为35%。

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[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials

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