| Project/Area Number |
12555081
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | GIFU NATIONAL COLLEGE OF TECHNOLOGY |
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Principal Investigator |
KOSAKI Masamitsu Gifu National College of Technology, President, 校長 (80023191)
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| Co-Investigator(Kenkyū-buntansha) |
TOKORO Tesuro Gifu National COLLEGE OF TECHNOLOGY, DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING, PROFESSOR, 電気情報工学科, 教授 (10155525)
NAGAO Masayuki Toyohashi University of Technology Faculity of Engineering, Professor, 工学部, 教授 (30115612)
SAITOH Takashi Fujikura Inc. Material Technology Research Center, Chief Director, 材料技術研究所, 主幹部長
齋藤 隆 (株)フジクラ, 材料技術研究所, 主幹部長
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥9,800,000 (Direct Cost: ¥9,800,000)
Fiscal Year 2001: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2000: ¥6,500,000 (Direct Cost: ¥6,500,000)
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| Keywords | ethylene- propylene rubber / filler / superconductor / performance of electrical insulation / cryogenic region / exruded polymer cable / DC power transmission / power cable |
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| Research Abstract |
The electric power cable which was developed by this research is high performance super-conducting power cable with extruded polymer insulation for considering a DC power transportation. Arranging super-conductors (the bismuth type) formed in tape-shape on a core copper pipe, it is covered by the ethylene propylene rubber (EPR) insulation which includes inner and outer semi-conducting layers.
The results are summarized as follows :
(1) Attempting a best arrangement on the stabilization copper pipe of the super-conductor tapes, their contact situation was confirmed to stable during the examines of repeated cooling to cryogenic temperature.
(2) The EPR insulation did not suffer from the thermal and mechanical stresses from cooling process to liquid nitrogen temperature. Using SZ wire shield which correspond to cold shrinkage and flexibility of the cable, dielectric loss tangent delta of the cable was reduced at cryogenic temperature.
(3) Using SZ wire shield, the characteristic of approximately the same tan 6 was gotten in both short length and long length cable samples.
(4) Computing the dielectric loss of the cable, it was about 0.013 W for every 1 m of cable. This dielectric loss was as same as the AC loss of the super-conductor. Itwas more than 1 digit lower compared with the invasion heat from outside of the cable radius direction.
The results obtained in this study open an avenue to the application of polymeric materials (EPR) to electrical insulation system of super-conducting power apparatus for both AC and DC conditions. EPR seems to be promising material for solid insulation in the cryogenic region.
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