2003 Fiscal Year Final Research Report Summary
Development of High Performance Electrical Insulation System of Superconducting Power Apparatus by Polymeric Composite Materials
| Project/Area Number |
14350152
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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 | 一般 |
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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 Collage of Technology, President, 校長 (80023191)
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| Co-Investigator(Kenkyū-buntansha) |
MURAMOTO Yuji Meijo University, Faculty of Science and Technology, Lecturer, 理工学部, 講師 (70273331)
TOKORO Tetsuro Gifa National Collage 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, Department of Technology, Professor, 工学部, 教授 (30115612)
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| Project Period (FY) |
2002 – 2003
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| Keywords | ethylene-propylene rubber / cryogenic temperature / polymeric materials / filler / space charge / breakdown / treeing resistance |
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| Research Abstract |
The investigators have been studying the application of polymeric materials (ethylene-propylene rubber (EPR)) to electrical insulation system of superconducting power apparatus. At cryogenic temperature, there are many practical insulation studies on fluids such as liquid nitrogen or liquid helium but scarce studies on the solid insulation enabling a high voltage design.
The results are summarized as follows:
(1) Plastics with fillers, in the case of EPR, give excellent electrical performance in addition to the controlled thermal contraction at cryogenic temperature.
(2) The electrical breakdown and space charge of EPR samples with fillers for the DC electrical insulation system showed that the breakdown strength at cryogenic temperature is much higher than that at room temperature. This may be attributed to loss carrier injection from electrode and gives a strong incentive to design the electrical insulation of superconducting power apparatus.
(3) The EPR resistance to treeing both at cryogenic and room temperatures and the effect of fillers on resistance to treeing showed that EPR has sufficient resistance to AC treeing at cryogenic temperature and the fillers improve resistance to AC treeing slightly.
The results obtained in this study open an avenue to the application of polymeric materials (EPR) to electrical insulation system of superconducting power apparatus. EPR seem to be promising materials for solid insulation in the cryogenic region.
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