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Research on Ultra-Wide-Band High Voltage Measuring System Utilizing Electric Field Sensing

Research Project

Project/Area Number 05452175
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 電力工学・電気機器工学
Research InstitutionThe University of Tokyo

Principal Investigator

ISHII Masaru  Institute of Industrial Science, University of Tokyo Professor, 生産技術研究所, 教授 (40107397)

Co-Investigator(Kenkyū-buntansha) MATSUMOTO Takaie  Faculty of Engineering, Shizuoka University Associate Professor, 工学部, 助教授 (40157368)
HOJO Junichi  Institute of Industrial Science, University of Tokyo Research Associate, 生産技術研究所, 助手 (70013175)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1994: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1993: ¥3,700,000 (Direct Cost: ¥3,700,000)
KeywordsMeasurement / High Voltage / Voltage Divider / Lightning Impulse
Research Abstract

The divider ratio and the response characteristics of the high voltage impulse measuring system, which incorporates the ultra-wide-band high voltage divider designed and manufactured in the previous fiscal year, have been measured experimentally. In general, it is difficult to precisely know the divider ratio by measuring the impedance of individual parts of a high voltage divider at a low frequency. It will be possible to determine the divider ratio without performing the comparison test through the accurate three-dimensional electrostatic field analysis and the measurement of the impedance of the low voltage arm. This time, the divider ratio was determined by the comparison measurement with a low impedance divider.
The measured step response of the system with the damping resistor of 200 Ohms achieved 5.5ns of the response time, and 75ns of the settling time. These numbers are comparable to those of the best high voltage dividers ever reported, and are not foreseen for dividers having … More high impedance. Thus it has been demonstrated that the developed high voltage measuring system has an ultra-wide-band characteristic. These numbers well clear the requirements for the fastest reference measuring system, demanded by the relevant IEC Standard totally revised in November 1994.
The drawback of this type of a high voltage measuring system is that the divider ratio is susceptible to the distortion of surrounding electrostatic field due to the presence of other objects in the vicinity. This effect has been evaluated through a three-dimensional electrostatic field analysis and experiments. The accuracy of plus minus 0.5% is demanded for a reference measuring system according to the revised IEC Standard. As a result of the present study, the height of the lead wire connecting the high voltage divider and the impulse generator or the object under test is known to have little influence on the accuracy of the measurement. The manufactured 1MV-class high voltage measuring system kept its accuracy when the divider was more than 7m away from the impulse generator or the object under test, and was more than 4m apart from grounded objects or the walls of the laboratory. As these limitations can easily be overcome at a large high voltage laboratory, so the usefulness of the high voltage measuring system designed and manufactured in the present study has been confirmed. Less

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] 石井勝: "100kV級雷インパルス電圧による分圧器の国内持ち回り比較試験" 電気学会論文誌B. 114-B. 91-97 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Masaru Ishii: "100kV Class Intercomparison of Impulse Voltage Dividers in Japan" Trans.IEE of Japan. Vol.114-B. 91-97 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 石井 勝: "100kV級雷インパルス電圧による分圧器の国内持ち回り比較試験21GC01:電気学会論文誌B" 114-B. 91-97 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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