2015 Fiscal Year Final Research Report
Research on Creeping Discharge Characteristics and Streamer Propagating Mechanism in Environmentally Fitted Insulating Oils
| Project/Area Number |
24560351
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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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 | Kanazawa Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Keywords | 交流高電圧 / インパルス高電圧 / 沿面放電 / 植物由来絶縁油 / 鉱油 / 複合絶縁系 / 油中ガス分析 |
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| Outline of Final Research Achievements |
The characteristics of creeping dischages in vegetable-based oils (crude rapeseed oil and palm fatty acid ester(PFAE) oil) were investigated using the impulse high voltage and 60Hz AC high voltage. In the impulse creeping streamer propagating in narrow gaps in the range 0.1 to 2.0 mm with the back side electrode, the flashover voltage in both polarities increases with the decrease of gap spacing and the mean streamer velocity decreases, and these effects are remarkable in the positive streamer. On the other hand, the characteristics of AC creeping discharges in vegetable-based oils with and without the deterioration were clarified. From a comprehensive view of these investigation, PFAE oil can be expected as promising fluid for the eco-friendly insulation design, size reduction and longer service life of oil-filled power transformers, because of better insulation performance and excellent durability to aging.
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| Free Research Field |
高電圧工学
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