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2000 Fiscal Year Final Research Report Summary

Study of improvement of electrical social environment on the electromagnetic field generated with high density electric energy transportation.

Research Project

Project/Area Number 10450108
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 InstitutionShibaura Institute of Technology

Principal Investigator

OKUMURA Katsuo  SHIBAURA INSTITUTE OF TECHNOLOGY DEPT.OF ELECTRICAL SYSTEMS FOR URBAN ENGINEERING, PROFESSOR., 工学部, 教授 (00052837)

Co-Investigator(Kenkyū-buntansha) KAWAMURA Tatsuo  RESEARCH ORGANIZATION FOR ADVANCED ENGINEERING, SHIBAURA INSTITUTE OF TECHNOLOGY, CENTER FOR ENERGY AND ENVIRONMENT, GUEST PROFESSOR., 先端工学研究機構, 客員教授 (20013097)
ISAKA Katsuo  UNIVERSITY OF TOKUSHIMA DEPT.OF ELECTRICAL ENGINEERING, PROFESSOR., 工学部, 教授 (50035630)
Project Period (FY) 1998 – 2000
KeywordsMagnetic field / Electric field / Electromagnetic field / Extremely Low Frequency (ELF) / Corona noise / Walsh transform / Wavelet transform / Shielding material
Research Abstract

This study carried out during the past three-years from April, 1998 to March, 2001.An aim of this study is to improve the electrical environment on electromagnetic wave interference generated with transport of high density electric energy.
The obtained results are summarized as follows :
(1) In case of single-phase GIL model, it was found that the magnetic field around the GIL is not reduced by the aluminum enclosure, since the eddy current circulates between inner and outer parts in the aluminum enclosure. Other hand, in case of three-phase GIL model, it was found that the mamnetic field around the GIL are reduced by aluminum enclosure, since most of the eddy current appears at inner part in the aluminum enclosure and flows to the opposite side of enclosure.
(2) ELF magnetic field near three-phase GIL model was evaluated by measuring magnetic flux density for various conductor configurations. As the results, ELF magnetic field near three-phase GIL was considerably reduced comparing with … More single-phase one.
(3) The finite element method is applied to the analysis of current density distributions in a human model which stands with erect position on the insulating circular plate, and the characteristics of such internal current density distributions are clarified.
(4) In axisymmetrical human model. The calculations lead to the quantification of the characteristics of the internal current density inside an ungrounded human model. The results have demonstrated the adequacy of the experimental results reported by Kaune etal who used an 3-dimensional miniature human model.
(5) The walsh and wavelet transformation method was used in order to analyzed for purpose deducing basic characteristics or the fluctuation corona discharge. The obtained results are correlated with previous findings and theories of negative pulse corona discharges.
(6) To develop the failure diagnosis techniques for HV power system, we have investigation to obtain the AC corona discharge pattern with different insulating analysis by using Self Organization Map Method (SOMM) with Neural Network (NN). It was indicated that the SOMM with NN was an effective technique for a Failure Diagnosis of the power system.
(7) Investigation was carried out for the development of the failure diagnosis technique by locating of corona in electric power installation using the electromagnetic wave method. By analyzing the difference of delay times of electromagnetic wave from corona discharge point, the detecting of the corona location in electric power installation can be realized. The obtained results are shown that this monitoring technique was an extremely valuable for detection and location of the low level corona.
(8) In order to understand shielding effect of materials using the metal spray coatinm technique, measurements have been performed using shielded enclosure. In case of paper sprayed coating with metal, the attenuation was almost shows the measurement limit, and it is though that adhesion of metal and the material influenced strongly characteristics of shielding effectiveness. Less

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Y.Miyamae,K.Okumura, et al.: "Evaluation of ELF Magnetic Field using GIL Model"Proceedings of the 10th Asian Conference on Electrical Discharge. H-803. 427-429 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 千葉,伊坂: "電界中の非接地人体モデル内に誘導される電流密度分布"電気学会論文B. Vol.119-B No.3. 401-407 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 井上,奥村: "絶縁材料に対する劣化パターン識別手法の検討"電気学会放電研究会資料. ED-01-21. 19-24 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 奥村,安藤,河村: "負針-平板ギャップにおけるコロナ放電の変動特性に関する研究"電気設備学会誌. Vol.19 No.12. 860-866 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 東,住広,奥村: "電力設備内の機器等における故障箇所標定システムの開発"電気設備学会誌. Vol.21 No.2. 158-165 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 森田,住広,奥村: "金属溶射技術を用いた電磁波シールド材の遮断特性とその評価"電子情報通信学会環境電磁工学研究会. EMCJ99-133. 19-24 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊坂勝生: "ディジタル化時代とEMC(第16編 第2章)"ミマツデータシステム. 6 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Miyamae, K.Okumura, et al.: "Evaluation of ELF Magnetic Field using GIL Model"Proceedings of the 10th Asian Conference on Electrical Discharge. H-803. 427-429 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Chiba, K.Isaka: "Distribution of Induced Current Density Inside an Ungrounded Human Model Exposed to Electric Field."T.IEE Japan. Vol.119-B, No.3. 401-407 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Inouse, K.Okumura: "Investigation of Characteristics of Corona Discharge using Identification Pattern Method for Insulating Material"ED-01-18〜34, DEI-01-24〜40, HV-01-18〜34. 19-24 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Okumura, Y.Ando, T.Kawamura: "Investigation of Stochastic Properties of Negative Corona Discharge with Needle-Plane Gap in Air"J.IEIE Japan. Vol.19, No.12. 860-866 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Okumura, S.Sumihiro, et al.: "Development of Failure Location System in Electric Power Installation using Electromagnetic Wave Method"J.IEIE Japan. Vol.21, No.2. 158-165 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Okumura, S.Sumihiro, et al.: "Measuring the Electro Magnetic Shielding Effectiveness of Materials using the Metal Spray Coating Technique"EMCJ99-133, Japan. 19-24 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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