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Research Project on the Gas Insulation Using a Gas Mixture

Research Project

Project/Area Number 11450112
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 電力工学・電気機器工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

TAKUMA Tadasu  Dept. of Electrical Engineering, Kyoto University Professor, 工学研究科, 教授 (50221370)

Co-Investigator(Kenkyū-buntansha) YAMAMOTO Osamu  Dept. of Electrical Engineering, Kyoto Unversity Assistant, 工学研究科, 助手 (70093333)
HAMADA Shoji  Dept. of Electrical Engineering, Kyoto University,Lecture, 工学研究科, 講師 (20246656)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥14,800,000 (Direct Cost: ¥14,800,000)
Fiscal Year 2001: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2000: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1999: ¥9,100,000 (Direct Cost: ¥9,100,000)
Keywordsgas insulation / SF_6 (sulphurhexafluoride) / fluorocarbon gas / gas mixture / discharge characteristics / global warming effect / electric power equipment / substation equipment
Research Abstract

SF_6 is widely used in important electric power systems such as gas-insulated switchgear (GIS). Recently, however, very high global warming potential (GWP) of SF_6 gas has become a very serious problem. This research project has proposed the "non-SF_6 (or SF_6-less) gas insulation" by substituting a gas mixture with PFC (perfluorocarbon) for SF_6. We have principally investigated the possibility of applying a gas mixture consisting of c-C_4F_8 (perfluorocyclobutan) and N_2 or CO_2.
(1) We have derived the expression for the release rate or loss rate at the liquefaction recovery process of a gas mixture containing an electronegative gas. By applying this derivation, we have made clear that the release rate of c-C_4F_8 from c-C_4F_8 /N_2 is much lower than that of SF_6 from SF_6/N_2 at the same mixing ratio.
(2) We have studied the insulation characteristics of c-C_4F_8 /N_2(or CO_2) in various conditions, and compared them with those of pure SF_6 and SF_6/N_2. Main experimental conditions … More are as follows :
Gas pressure : 0.1〜0.4MPa
Applied voltage : dc, 60Hz ac, lightning impulse
Mixingraito : 0, 5, 10, 20,100 %(vol %) of an electronegative gas
It has been shown that compared with SF_6/N_2, gas mixtures containing c-C_4F_8 have reasonably good insulation ability under quasi-homogeneous electric field conditions.
Nonlinearity, or synergism, in discharge voltage relative to mixing ratio, increases with Pd (gas pressure x gap length) for gas mixtures containing c-C_4F_8.
(3) Under extremely inhomogeneous conditions simulating sharp conducting particles in practice, the gas mixtures with c-C_4F_8 show almost equivalent insulation characteristics compared with SF_6/N_2. The ac sparkover voltage of c-C_4F_8 /N_2 is even higher at a pressure above 0.3MPa than that of pure SF_6.
(4) We estimate that by applying a gas mixture with c-C_4F_8 having the insulation strength, comparable to pure SF_6, the GWP (global warming potential) can be reduced to less 10%. This value is about a half of the GWP in the case SF_6/N_2 is applied at the same mixing ratio. Less

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report

Research Products

(26 results)

All Other

All Publications (26 results)

  • [Publications] 宅間 董: "c-C_4F_8を用いるガス絶縁方式"電気学会論文誌B. 119・4. 526-527 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T.Takuma: "Application of a gas mixture with c-C_4F_8 in gas insulation"Proc. of the 11th Int. Symp. on High Voltage Engineering. 11・3. 3-6 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Yamada: "AC speakover characteristics of gas mixtures containing c-C_4F_8"Proc. of 10th Asian Conf. on electrical Discharge (ACED). 10・1. A114(1)-A114(4) (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 宅間 董: "c-C_4F_8を含む混合ガスの液化回収特性と直流放電特性"電気学会論文誌B. 121・1. 129-135 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 宅間 董: "混合ガスの火花電圧実験式"放電研究(放電学会誌). 44・1-2. 87-92 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] O.Yamamoto: "Applying a gas mixture containing c-C_4-F_8 as an insulation medium"IEEE Trans. on Dielectrics and Electrical Insulation. 8・6. 1075-1081 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Hamada: "Possibility of gas mixtures containing c-C_4F_8 as a SF_6 substitute in gas insulation"Gaseous Dielectrics IX. 301-306 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T. Takuma: "Gas insulation with a gas mixture containing c-C_4F_8"Trans. IEE of Japan. Vol. 119-B No.4. 526-527 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T. Takuma: "Application of a gas mixture with c-C_4F_8 in gas insulation"Proc. of the 11th Int. Symp. on High Voltage Engineering (ISH). No.3197. 3 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Yamada: "AC sparkover characteristics of gas mixtures containing c-C_4F_8"Proc. Of the 10th Asian Conf on Electrical Discharge(ACED). A-114. (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T. Takuma: "Liquefied recovery and DC discharge characteristics of gas mixtures containing c-C_4F_8"Trans. IEE of Japan. Vol.121-B,No.1. 129-135 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T. Takuma: "Empirical formula for sparkover voltage of gas mixtures"Journal of the Institute of Engineers of Electrical Discharge in Japan. Vol.44,No.1-2. 87-92 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] O. Yamamoto: "Applying a gas mixture containing c-C_4F_8 as an insulation medium"IEEE Trans. on Dielectrics and Electrical, Insulation. Vol.8, No. 6. 1075-1081 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S. Hamada: "Possibility of gas mixtures containing c-C_4F_8 as a SF_6 substitute in gas insulation"Symp. on Gaseous Dielectrics IX. 301-306 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 宅間 董: "c-C_4F_8を用いるガス絶縁方式"電気学会論文誌B. 119・4. 526-527 (1999)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Takuma: "Application of a gas mixture with c-C_4F_8 in gas insulation"Proc. of the 11th Int. Symp. on High Voltage Engineering. 11・3. 3-6 (1999)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Yamada: "AC sparkover characteristics of gas mixtures containing c-C_4F_8"Proc. of 10th Asian Conf. on Electrical Discharge (ACED). 10・1. A114-1-A114-4 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 宅間 董: "c-C_4F_8を含む混合ガスの液化回収特性と直流放電特性"電気学会論文誌B. 121・1. 129-135 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 宅間 董: "混合ガスの火花電圧実験式"放電学会(放電学会誌). 44・1-2. 87-92 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] O.Yamamoto: "Applying a gas mixture containing c-C_4F_8 as an insulation medium"IEEE Trans. on Dielectrics and Electrical Insulation. 8・6. 1075-1081 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Hamada: "Possibility of gas mixtures containing c-C_4F_8 as a SF_6 substitute in gas insulation"Gaseous Dielectrics IX. 301-306 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 宅間董: "c-C_4F_8を用いるガス絶縁方式"電気学会論文誌B. 119・4. 526-527 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Takuma: "Application of a gas mixture with c-C_4F_8 in gas insulation"Proc. of the 11th Int. Symp. on High Voltage Engineering. 11・3. 3-6 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Yamada: "AC Sparkover Characteristics of Gas Mixtures Containing c-C_4F_8"Proc. of 10th Asian Conf. on Electrical Discharge (ACED) . 10・1. A-114,1-4 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 宅間董: "c-C_4F_8を含む混合ガスの液化回収特性と直流放電特性"電気学会論文誌B. 121・1. 129-135 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 宅間 董: "c-C_4F_8 を用いるガス絶縁方式"電気学会論文誌B. 119・4. 526-527 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-03-31   Modified: 2016-04-21  

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