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Basic Study on Electrical Insulation Property in a New Type Cryogenic Gas Insulated Transmission Line

Research Project

Project/Area Number 08455126
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 InstitutionThe University of Tokyo

Principal Investigator

HIDAKA Kunihiko  The University of Tokyo, School of Engineering, Professor, 工学系研究科, 教授 (90181099)

Co-Investigator(Kenkyū-buntansha) MATSUOKA Shigeyasu  The University of Tokyo, School of Engineering, Research Associate, 工学系研究科, 助手 (10114646)
CHIBA Masakuni  The University of Tokyo, School of Engineering, Research Associate, 工学系研究科, 助手 (20011140)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1997: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1996: ¥4,900,000 (Direct Cost: ¥4,900,000)
KeywordsCryogenic temperature / Electrical Discharge / High Voltage / Air / Nitrogen / Electrical Insulation / Charge Quantity / Paschen's Law / 送電路
Research Abstract

An intensive study on electrical insulation property in a cryogenic gas space is required for realizing a gas insulated transmission line and an electric power equipment using a high temperature super conductor. Electrical breakdown characteristics in a non-uniform field gap such as a rod-to-plane electrode which is stressed by lightning or switching impulse voltage are first investigated in a cryogenic gas space of -180 degrees Celsius provided by a cryostat. Secondly, electrical breakdown voltages of a cryogenic and uniform field gap of more than 100 mm whose data have not been so far accumulated are measured using a large cryostat of 1 m^3 in volume. Main results obtained form these studies are summarized as follows.
1) The breakdown voltage of a non-uniform field gap in air at room temperature becomes higher in the order, for lightning impulse, switching impulse and dc voltages. On the other hand, the value at cryogenic temperature becomes in the reverse order.
2) The breakdown voltage of a non-uniform field gap in nitrogen gas hardly depends on either temperature or voltage waveform. It mainly depends on the tip radius of a high potential rod electrode and it increases with increasing radius.
3) The charge produced due to corona discharge strongly depends on the occurrence voltage of the corona. the charge observed at -180 degrees Celsius becomes smaller than that observed at room temperature for the same corona occurrence voltage.
4) The breakdown voltage of a sphere-to-sphere gap of 150 mm in diameter increases linearly with increasing gap length up to 100 mm and tends to saturate over the gap length of 100 mmfor all voltage waveforms of dc, ac and impulse. In the region of the linear relationship, it is confirmed that the Paschen's law holds true for cryogenic temperature.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 赤峰 陽太郎: "極低温における空気および窒素の不平等電界雷インパルス放電特性" 電気学会論文誌. 119-A・5(掲載予定). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Akamine: "Gaseous Insulation Characteristics at Cryogenic Temperature" Proceedings of the InternationalConference on Electrical Engineering. 1. 407-410 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Akamine: "Analysis of Breakdown Phenomena in Non-Uniform Fields at Cryogenic Tcmperature" Proceedings of 12th International Conference on Gas Discharges and theirApplications. 1. 224-227 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 伊藤 裕介: "極低温不平等電界中のインパルス破壊電圧特性" 電気学会プラズマ・放電合同研究会資料. EP-96-53.ED-96-112. 85-93 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 伊藤 裕介: "極低温不平等電界中のインパルス破壊電圧特性(その2)" 電気学会放電研究会資料. ED-96-227. 79-87 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Akamine: "Lightning impulse discharge characteristics of air and nitrogen in non-uniform electric field at cryogenic temperature" Trans.IEE Japan. 119A (to be published). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Akamine: "Gaseous Insulation Characteristics at Cryogenic Temperature" Proceedings of the Internatoinal Conference on Electrical Engineering. 1. 407-410 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Akamine: "Analysis of Breakdown Phenomena in Non-Uniform Fields at Cryogenic Temperature" Proceedings of 12th Internatonal Conference on Gas Discharges and their Applications. 1. 224-227 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Itoh: "Impulse breakdown voltage characteristics in non-uniform field at cyogenic temperature" IEEJ Research Symposium on Plasma Physics and Electrical Discharge. No.EP-96-53, ED-96-112. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Itoh: "Impulse breakdown voltage characteristics in non-uniform field at cyogenic temperature, Part 2" IEEJ Research Symposium on Electrical Discharge. No.ED-96-227. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 赤峰陽太郎: "極低温における空気および窒素の不平等電界雷インパルス放電特性" 電気学会論文誌. 119-A・5(掲載予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Akamine: "Gaseous Insulation Characteristics at Cryogenic Temperature" Proceedings of the International Conference on Electrical Engineering. 1. 407-410 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Akamine: "Analysis of Breakdown Phenomena in Non-Uniform Fields at Cryogenic Temperature" Proceedings of 12th International Conference on Gas Discharges and their Applications. 1. 224-227 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 伊藤裕介: "極低温不平等電界中のインパルス破壊電圧特性" 電気学会プラズマ・放電合同研究会資料. EP-96-53,ED-96-112. 85-93 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 伊藤裕介: "極低温不平等電界中のインパルス破壊電圧特性(その2)" 電気学会放電研究会資料. ED-96-227. 79-87 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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