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Dry band formation mechanism of composite insulator with generalized finite difference-time domain

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Title: Dry band formation mechanism of composite insulator with generalized finite difference-time domain
Authors: HE Jiahong, DONG Bowen, HE Kang
Source: 电力工程技术, Vol 41, Iss 1, Pp 134-140 (2022)
Publisher Information: Editorial Department of Electric Power Engineering Technology, 2022.
Publication Year: 2022
Subject Terms: composite insulator, dry band formation, heat transfer model, generalized finite difference-time domain, arc propagation, flashover model, Applications of electric power, TK4001-4102
More Details: The pollution flashover of composite insulators is mainly the flashover caused by alternate occurrence of arc development and dry band formation. At present, researchers have investigated the development of insulator arc along the surface. However, the formation mechanism and process of the dry band have not been fully analyzed due to its stochastic property. In this paper, the generalized finite difference time domain method is used to calculate composite insulators' surface electrothermal coupling field. The dry band formation and arc development are modeled to study the mechanism of the dry band influencing arc formation and the optimization strategy of insulator dimensions. Meanwhile, the flashover experiment of composite insulators under contaminated conditions is carried out. The experimental results are compared with the simulation results to verify the accuracy of the simulation model. The results show that the generalized finite-difference time-domain method is suitable for multi-field calculations near the insulator for its effectiveness in reducing computational complexity. Furthermore, dry band is more likely to generate where is close to the electrodes of insulators. Therefore, probability of flashover is decreased by insulator geometry optimization with no changing the insulator's creepage distance.
Document Type: article
File Description: electronic resource
Language: Chinese
ISSN: 2096-3203
Relation: https://www.epet-info.com/html/2022/1/200915748.html; https://doaj.org/toc/2096-3203
DOI: 10.12158/j.2096-3203.2022.01.018
Access URL: https://doaj.org/article/dc54364b75f94327871c8771e2d4a344
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  Data: Dry band formation mechanism of composite insulator with generalized finite difference-time domain
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  Data: <searchLink fieldCode="AR" term="%22HE+Jiahong%22">HE Jiahong</searchLink><br /><searchLink fieldCode="AR" term="%22DONG+Bowen%22">DONG Bowen</searchLink><br /><searchLink fieldCode="AR" term="%22HE+Kang%22">HE Kang</searchLink>
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  Data: 电力工程技术, Vol 41, Iss 1, Pp 134-140 (2022)
– Name: Publisher
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  Group: PubInfo
  Data: Editorial Department of Electric Power Engineering Technology, 2022.
– Name: DatePubCY
  Label: Publication Year
  Group: Date
  Data: 2022
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22composite+insulator%22">composite insulator</searchLink><br /><searchLink fieldCode="DE" term="%22dry+band+formation%22">dry band formation</searchLink><br /><searchLink fieldCode="DE" term="%22heat+transfer+model%22">heat transfer model</searchLink><br /><searchLink fieldCode="DE" term="%22generalized+finite+difference-time+domain%22">generalized finite difference-time domain</searchLink><br /><searchLink fieldCode="DE" term="%22arc+propagation%22">arc propagation</searchLink><br /><searchLink fieldCode="DE" term="%22flashover+model%22">flashover model</searchLink><br /><searchLink fieldCode="DE" term="%22Applications+of+electric+power%22">Applications of electric power</searchLink><br /><searchLink fieldCode="DE" term="%22TK4001-4102%22">TK4001-4102</searchLink>
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  Label: Description
  Group: Ab
  Data: The pollution flashover of composite insulators is mainly the flashover caused by alternate occurrence of arc development and dry band formation. At present, researchers have investigated the development of insulator arc along the surface. However, the formation mechanism and process of the dry band have not been fully analyzed due to its stochastic property. In this paper, the generalized finite difference time domain method is used to calculate composite insulators' surface electrothermal coupling field. The dry band formation and arc development are modeled to study the mechanism of the dry band influencing arc formation and the optimization strategy of insulator dimensions. Meanwhile, the flashover experiment of composite insulators under contaminated conditions is carried out. The experimental results are compared with the simulation results to verify the accuracy of the simulation model. The results show that the generalized finite-difference time-domain method is suitable for multi-field calculations near the insulator for its effectiveness in reducing computational complexity. Furthermore, dry band is more likely to generate where is close to the electrodes of insulators. Therefore, probability of flashover is decreased by insulator geometry optimization with no changing the insulator's creepage distance.
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        Value: 10.12158/j.2096-3203.2022.01.018
    Languages:
      – Text: Chinese
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 134
    Subjects:
      – SubjectFull: composite insulator
        Type: general
      – SubjectFull: dry band formation
        Type: general
      – SubjectFull: heat transfer model
        Type: general
      – SubjectFull: generalized finite difference-time domain
        Type: general
      – SubjectFull: arc propagation
        Type: general
      – SubjectFull: flashover model
        Type: general
      – SubjectFull: Applications of electric power
        Type: general
      – SubjectFull: TK4001-4102
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      – TitleFull: Dry band formation mechanism of composite insulator with generalized finite difference-time domain
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            NameFull: HE Jiahong
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            NameFull: DONG Bowen
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            NameFull: HE Kang
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              Y: 2022
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