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Research on Faint Ground Fault Detection in Power Distribution Line

Research Project

Project/Area Number 06650473
Research Category

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

Allocation TypeSingle-year Grants
Research Field 計測・制御工学
Research InstitutionKyushu Institute of Technology

Principal Investigator

UEDA Ryuzo  Kyushu Institute of Technology Electrical Engineering, Professor, 工学部, 教授 (60039120)

Co-Investigator(Kenkyū-buntansha) SONODA Toshikatsu  Kyushu Institute of Technology Electrical Engineering, Assistant, 工学部, 助手 (40107842)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1995: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1994: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordsground fault / faint ground fault / power supply failure / rainstorm / fineness ground fault detection / magnetic field / magnetic field sensor / detectable resolution / リ-ク電流 / 絶縁劣化 / 予防技術 / 磁気センサ / 高感度化 / 電子回路ノイズ / コアノイズ / -
Research Abstract

What has to be achieved in the today's power distribution network is to reduce the interpretation rate of power supply to as low a level as possible, if possible to zero. This study presents a trial for such a requirement and is directed to provide a technique which can be an effective means for finding out faint deterioration in the insulation state of the distribution line. The applicability of the magnetic field sensor which has been developed in our laboratory are discussed and some fundamental problems for improving the detection sensitivity are treated : (i) with respect to such the detection of low level magnetic field, the relationship between the sensitivity and the noise is refined. One trial on this point is performed through the zero phase current detection in three phase ; (ii) on the choice of the core utilized in the sensor the problem of core noise which occupies a large weight in the noise appearing in the sensor output is clarified. Its measurement system is developed and concrete measurement result is presented on two different types of core. Based on this system, we obtain a means for searching the core fit for the sensor ; (iii) on constitution of the sensor circuit a new type of reference voltage generating circuit is presented. This has a possibility of improving the precision of the sensor circuit. These are the technology required for achieving the high detection sensitivity of the sensor. Taking into account them, the reconstitution of the sensor has to be performed. After that the proposed approach will be put into practice by certifying the degree of noise reduction of 60Hz power line magnetic noise rough the field testing.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Ryuzo Ueda: "Feasibility of Zero Phase Current Detection by Sensing Current at Each of The Three Phases in Power Delivery" IEEE Trans.on Power Delivery. Vol.10,No.2. 613-620 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 園田敏勝: "低雑音・低揺らぎ基準電圧発生回路" 電気学会論文誌C分冊. Vol.115-C,No.6. 798-804 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Akira Yoshihiro: "A System for Measuring Magnetic Core Noise as aFunction of the Magnetization Level" IEEE Trans.on MAG. Vol.31,No.4. 2389-2407 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Ryuzo Ueda: "Feasibility of Zero Phase Current Detection by Sensing Current at Each of The Three Phases in Power Delivery" IEEE Trans.on Power Delivery. Vol.10, No.2. 613-620 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Toshikatsu Sonoda: "DC Reference Voltage Circuit Pursuing Low Noise and Low Fluctuation Levels" T.IEE Japan. Vol.115-C,No.6. 798-804 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Akira Yoshihiro: "A System for Measuring Magnetic Core Noise as a Function of the Magnetization Level" IEEE Trans.on MAG.Vol.31, No.4. 2389-2407 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 吉廣晃・園田敏勝・上田隆三: "汎用演算増幅器の温度ドリフトについて" 電気関係学会九州支部連合大会 講演論文集. 885 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 梶原和範・園田敏勝・上田隆三: "ツェナ-ダイオード型基準電圧用二重構造恒温槽" 電気関係学会九州支部連合大会 講演論文集. 888 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 園田敏勝・梶原和範・上田隆三: "恒温槽の温度揺らぎと制御回路" 電気関係学会九州支部連合大会 講演論文集. 889 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 上田隆三 他: "Feasibility of Zero Phase Current Detection by Sensing Current at Each of The Three Phases in Power Distibution Networks" IEEE PES Paper No.94 SM 492-9 PWRD. (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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