| Project/Area Number |
11650287
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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 |
電力工学・電気機器工学
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| Research Institution | Nagasaki University |
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Principal Investigator |
MATSUO Hisao Nagasaki University, Faculty of Engineering, Professor, 工学部, 教授 (80039057)
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| Co-Investigator(Kenkyū-buntansha) |
FUJISHIMA Tomoyuki Nagasaki University, Faculty of Engineering, Assistant, 工学部, 助手 (80264208)
YAMASHITA Takahiko Nagasaki University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (50182499)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1999: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | wet polluted surface / surface discharge / insulator / electrolytic solution |
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| Research Abstract |
An electrolytic solution surface was used to simulate the surface of wet polluted insulators. A local discharge propagates on the solution surface when the voltage is applied to the surface. The electrical contact between the local discharge on the electrolytic solution and the solution surface was examined. The distribution of the current from the local discharge to the solution is estimated from the potential distribution measured with the probes placed in the solution. The resistivity of the solution is varied from about 80 to 370Ω cm. The impulse voltages of 2/80 μs, 10/800 μs and 100/2500 μs are used as the applied voltage. The peak value of the applied voltage was 1.05 to 1.4 times the 50% flashover voltage V_<50> under each set of experimental conditions. As a result, it is found that most of the discharge current flows from the tip part of the local discharge, and the current from the local discharge column is considerably low. Further, the distribution of the current from the local discharge to the solution is found to be hardly influenced by the resistivity of the solution, the peak value of the applied voltage or the applied voltage waveform.
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