| Project/Area Number |
60460111
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
電力工学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KOUNO Teruya The University of Tokyo, 工学部, 教授 (30010705)
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| Co-Investigator(Kenkyū-buntansha) |
CHIBA Masakuni The University of Tokyo, 工学部, 助手 (20011140)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 1986: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1985: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | Mixed gas / Discharge voltage / Flashover voltage / Synergism / Sulphur hexafluoride / electro-negative gas / Freon gas / 六弗化プロピレン |
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| Research Abstract |
1. A calculation method of flashover voltage of a mixed gas in uniform field using electron energy distribution given by Boltzmann equation, which we have proposed, was convinced in general cases.
2. The relation between the flashover voltage of a mixed gas and the ones of the component gases were made clear by experimental investigation. Used gases are <SF_6> , <CCl_2> <F_2> , <C_3> <F_8> , <N_2> , <O_2> ,Ar and binary mixtures of them.
3. It was both experimentally and theoretically convinced that the flashover voltages of a mixed gas composed of two electro-negative gases having nearly same flashover voltages show the character of synergism and have the maximum value at a mixing ratio which is larger than each flashover voltage of component gases.
4. Some experiments were made to investigate the discharge mechanism in mixed gas in non-uniform field. In non-uniform field, very little amount of a component gas or impurities such as water vapor has a sensitive effect on discharge phenomena.
5. <C_3> <F_6> gas is known as a rare example in which Paschen's law is not valid. Flashover voltages in the gas were measured with and without irradiation by ultra-violet lamp. The flashover voltages without irradiation was much larger than the one with it even in unform field of DC voltage.
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