Development of 22 kV HTS Triaxial Superconducting Bus
| Autor: | Tsutomu Koizumi, Takayo Hasegawa, Shigeki Sano, Tasuku Kitamura, Hiroki Ohnishi, Tianlong Wang, Nobuhiro Mido, Hideo Sugane, Kazuhisa Adachi, Masayuki Konno, Kei Shiohara, Masataka Iwakuma |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Busbar business.industry Nuclear engineering Superconducting magnetic energy storage Condensed Matter Physics computer.software_genre 01 natural sciences Electronic Optical and Magnetic Materials law.invention Simulation software law Thermal insulation 0103 physical sciences Fluent Vacuum level Electrical and Electronic Engineering 010306 general physics Transformer business computer Voltage |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 27:1-5 |
| ISSN: | 1558-2515 1051-8223 |
| DOI: | 10.1109/tasc.2017.2669186 |
| Popis: | When conventional power cables are replaced with superconducting ones, it is necessary to realize a large transmission capacity with a low heat-road from an economic standpoint. In this regard, the isolation power bus (IPB), which is used to connect a generator to a step-up transformer in power plants, is one of the potential candidates to achieve this. We have been developing a 22 kV class triaxial superconducting bus as an alternative to the IPB in which Y 1 Ba 2 Cu 3 O 7-d tapes are used, and we have already reported a basic design. In this study, we fabricated 22-3 kA class test cables and terminations to verify the design ansd investigate the properties of the system. A 7-m-long superconducting test cable was manufactured by using industrial winding machines and critical current I c values, and voltage withstand tests were performed. The I c value of each phase was 4 kA or more at 77 K, which was almost equal to the value of the design. In addition, the withstand voltage was higher than the ac withstand voltage of 50 kV and the lightning impulse of 125 kV. Furthermore, thermal loss to the cryogenic region from the cable and terminations was calculated, and the flow pattern and the pressure loss of liquid nitrogen in a 100-m-long cable were simulated by using a FLUENT simulation software. The cryogenic system could be designed based on the simulation. The termination design was the most difficult because heat insulation and dielectric insulation for a high voltage had to be realized. We tested various kinds of heat insulation techniques with several vacuum levels to develop an appropriate design. |
| Databáze: | OpenAIRE |
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