• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of a dynamic discharge model on wet contaminated insulators taking the discharge propagation into account

Research Project

Project/Area Number 19K04329
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21010:Power engineering-related
Research InstitutionThe Open University of Japan (2021-2023)
Nagasaki University (2019-2020)

Principal Investigator

Yamashita Takahiko  放送大学, 長崎学習センター, 特任教授 (50182499)

Co-Investigator(Kenkyū-buntansha) 古里 友宏  長崎大学, 工学研究科, 准教授 (70734002)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords汚損沿面放電 / 水溶液 / 抵抗率 / 接触面積 / 電流密度 / 二次電子放出係数 / 放電維持機構 / 電極降下 / 導電率 / pH / 水上放電 / 放電モデル
Outline of Research at the Start

がいしなどの外部絶縁物上で起こる汚損沿面放電や水処理に用いられる水上放電などは金属電極間に水溶液が存在するので,少なくとも片方の電極が水溶液の場合の放電である。このような放電は,複雑な様相を呈するため,これまで十分には明らかにされてこなかった。また,分野毎に取り扱いが異なり,実験条件等が一致しないため,汚損沿面放電と水上放電の研究成果を相互に活用できない。本研究課題では,それらの研究成果の相互利用を可能にするための補完的な実験を実施するとともに,研究代表者がこれまでに蓄積してきた研究成果を基に,このような放電の動的モデルを提案し,その検証を行う。

Outline of Final Research Achievements

Propagation model of a surface discharge on water was developed. Voltage/current waveforms are calculated using a double-exponential function which assumes the resistance of water decreases with increasing discharge contact area. A conductive disk having a given potential is used to model the discharge contact area and the temporal variation of the radius of the disk is discussed. The electrostatic field calculation at the needle-to-water gap is performed to determine the initial discharge contact area. Expansion of the contact area in the creepage direction is evaluated by the electric field calculation at the edge of the conductive disk. The velocity of the expansion increases with the applied voltage. The maximum contact radius increases with decreasing conductivity of water under the same applied voltage. The tendency of simulation results is consistent with the previous observation results of the discharge propagation.

Academic Significance and Societal Importance of the Research Achievements

汚損沿面放電の進展特性や水上放電の電圧電流特性などをシミュレーションによって求めることができるので,これまで主に実験を通して行われてきたがいしの耐汚損設計・評価,ポリマーがいしの劣化評価,水処理装置の設計や運転制御などに利用可能である。また,分野毎に取り扱いが異なる汚損沿面放電と水上放電の研究成果を相互に活用できる。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Underwater shock wave induced by pulsed discharge on water2021

    • Author(s)
      Furusato Tomohiro、Sasaki Mitsuru、Matsuda Yoshinobu、Yamashita Takahiko
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 55 Issue: 11 Pages: 115203-115203

    • DOI

      10.1088/1361-6463/ac3f57

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Validation of the local thermodynamic equilibrium at a local current concentration area of positive pulsed surface discharge plasma on water2020

    • Author(s)
      Tomohiro Furusato, Kazushi Oura, Yoshinobu Matsuda, Mitsuru Sasaki, Yuki Inada, Takahiko Yamashita
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SH Pages: SHHA07-SHHA07

    • DOI

      10.35848/1347-4065/ab71d9

    • NAID

      120006988218

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Simulation of voltage/current waveforms and contact area of pulsed surface discharge on water2019

    • Author(s)
      T. Furusato, Y. Yamamoto, T. Sakamoto, K. Oura, Y. Matsuda, T. Yamashita
    • Journal Title

      IEEE Transactions on Dielectrics and Electrical Insulation

      Volume: 26 Issue: 2 Pages: 439-446

    • DOI

      10.1109/tdei.2018.007748

    • NAID

      120006987758

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 汚損湿潤面における放電の陰極降下と二次電子放出係数による放電維持機構の検討2021

    • Author(s)
      鍋島雄飛, 是枝弘行, 古里友宏, 山下敬彦
    • Organizer
      電気学会誘電・絶縁材料/放電・プラズマ・パルスパワー/高電圧 合同研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 電解質水溶液面における放電の陰極降下と二次電子放出係数2020

    • Author(s)
      鍋島雄飛, 古里友宏, 是枝弘行, 山下敬彦
    • Organizer
      静電気学会全国大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 水上パルス沿面放電プラズマの局所熱平衡状態の評価2020

    • Author(s)
      大浦和志, 古里友宏, 稲田優貴, 松田良信, 山下敬彦
    • Organizer
      電気学会 誘電・絶縁材料/放電・プラズマ・パルスパワー/高電圧合同研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 放電接触面積の推定による水上パルス沿面放電の特性解明2020

    • Author(s)
      坂本拓也, 古里友宏, 山下敬彦
    • Organizer
      電気学会 誘電・絶縁材料/放電・プラズマ・パルスパワー/高電圧合同研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 水上沿面パルス沿面放電から発生する衝撃波および発光スペクトルの観測2020

    • Author(s)
      黒川崇文, 古里友宏, 山下敬彦
    • Organizer
      電気学会 誘電・絶縁材料/放電・プラズマ・パルスパワー/高電圧合同研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] Observation of shock wave generated by pulsed surface discharge on water2019

    • Author(s)
      Takafumi Kurokawa, Tomohiro Furusato, Yoshinobu Matsuda, Takahiko Yamashita
    • Organizer
      The 11th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 汚損湿潤面におけるドライバンド放電の形態の遷移と電流の関係2019

    • Author(s)
      岩永 拓実, 小西凌, 古里友宏, 山下敬彦
    • Organizer
      2019年度(第72回)電気・情報関係学会九州支部連合大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 水上パルス沿面放電の 陰極降下電圧と電流密度2019

    • Author(s)
      古里友宏, 坂本拓也, 山下敬彦
    • Organizer
      静電気学会全国大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Evaluation of current density of pulsed surface discharge on water solution by analyzing voltage/current waveforms2019

    • Author(s)
      Takuya Sakamoto, Tomohiro Furusato, Yota Yamamoto, Kensuke Sasaki, Takahiko Yamashita
    • Organizer
      International Conference on Phenomena in Ionized Gases (XXXIV ICPIG) and the 10th International Conference on Reactive Plasmas (ICRP-10)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Evaluation of local thermal equilibrium of pulsed surface discharge on water2019

    • Author(s)
      Kazushi Oura, Tomohiro Furusato, Takahiko Yamashita
    • Organizer
      International Conference on Phenomena in Ionized Gases (XXXIV ICPIG) and the 10th International Conference on Reactive Plasmas (ICRP-10)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi