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Fundamental Research of Power System Protection by applying Zone-Tune-Up Estimation Theory

Research Project

Project/Area Number 60550189
Research Category

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

Allocation TypeSingle-year Grants
Research Field 電力工学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

TOYODA Junichi  TOHOKU University, Faculty of Engineering, Professor, 工学部, 教授 (70054319)

Co-Investigator(Kenkyū-buntansha) NAITOH Fuminobu  TOHOKU University, Faculty of Engineering, Assistant, 工学部, 助手 (00005357)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1985: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsPower system protection / Digital protection system / Transient harmonics / Apparent impedance / 距離継電方式
Research Abstract

The purpose of this research is to develop the efficient estimation technique to eliminate the specified non-integer-harmonics (for instance, 3.7 harmonics and so on) with exponentially decay, which is included in the measured signal of the digital relaying system. Transient distortion of the signals becomes more severe with increase in the quantity of reactive compensation sources which usually increases with the size of EHV systems. Therefore, it becomes serious problem to estimate fundamental frequency component from the highly distorted measurement and to identify the fault location precisely in digital distance relay.
Proposed algorithm in this research is based on the non-recursive type filter of which the coefficients are determined by minimizing the residue under the constraints, so-called 'vectorchain-rule'. 'Vector-chain-rule' is a phaser relation existing between the sequential sample data of exponentially decayed sinusoidal signal, which is newly introduced in this research. On the other hand, the frequency of transient harmonics depends on the location of fault. Therefore, the filter coefficient should be so carefully selected as the best identification of fault location is achieved around the boundary of protective zone. In other words, the filter coefficients should be tuned up the frequency of the transient hamonics at the protective zone. This zone-tune-up estimation technique is tested by using simulation model of EHV system. Result is compared with result by DFT (discrete Fourier transformation). When the measured data contains decayed transient component, the proposed algorithm shows excellent discriminative ability. The concept of surface protection for the grid-network system has been surveyed. The new idea is proposed for two-dementional identification of the fault location.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 豊田淳一: 電気学会論文誌B. 105. 489-495 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 小室晃彦,和沢良彦,豊田淳一: 電気学会電力技術研究会資料. PE-85-114. 167-176 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 小室晃彦,豊田淳一: 電気学会電力技術研究会資料. PE-86-65. 133-140 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 豊田淳一: 昭和60年電気・情報関連学会連合大会講演論文集#28-6. 4. 165-168 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 小室晃彦,豊田淳一: 昭和61年度電気学会全国大会講演論文集#1061. 小室晃彦,. 1375-1376 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 小室晃彦,豊田淳一: 昭和62年電気学会全国大会講演論文集. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] TOYODA, Junichi: "Zone-Tune-Up Estimation of Apparent Impedance for Digital Distance Protection" IEE Japan, Trans. B. 105. 489-495 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] KOMURO, Akihiko ; WAZAWA, Yoshihiko ; TOYODA, Junichi: "Fundamental Study of Digital Fault Identification in Power System" Papers of Technical Meeting on Power Engineering, IEE Japan. PE-85-114. 167-176 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] KOMURA, Akihiko ; TOYODA, Junichi: "Digital Identification of Fault and its Location in Distance Relaying System" Papers of Technical Meeting in Power Engineering, IEE Japan. PE-86-65. 133-140 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] TOYODA, Junichi: "An Application of Digital Signal Processing in Power Systems Engineering" Joint Convention Record of IEE and IECE Japan, #28-6. 4. 165-168 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] KOMURO, Akihiko ; TOYODA, Junichi: "An Application of DSP to Power System Protection" Annual Convention Record of IEE Japan, #1061. 1375-1376 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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