2012 Fiscal Year Final Research Report
Basic Study on Electrical Insulation by Clarifying Flashover Mechanisms along Insulating Spacer in Vacuum
| Project/Area Number |
22560272
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | 公益財団法人応用科学研究所 (2012)
Kyoto University (2010-2011) |
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Principal Investigator |
YAMAMOTO Osamu 公益財団法人応用科学研究所, 研究員 (70093333)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 真空遮断器 / 固体絶縁物 / 沿面放電 / 帯電特性 / 帯電シミュレーション / 放電特性 / 放電電圧理論式 |
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| Research Abstract |
Insulating spacers that support high voltage conductors in vacuum suffer from very low insulation performance. The insulation design so far is based on experiences including empirical formulas. In the present research we offer a theoretical formula that enables calculation of flashover voltage, which we believe to help the reliable insulation designing. As the flashover in vacuum is triggered by the charging of insulators, we have conducted theoretical and experimental studies to obtain the surface charge distribution. The charge distribution has been incorporated to establish the theoretical formula. The experimentally obtained flashover voltages and the calculation results agreed for various insulator materials and their surface conditions.
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