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Study on Thermal–Fluid Coupling Simulation of GIS Disconnect Switch Considering External Environmental Factors.

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Title: Study on Thermal–Fluid Coupling Simulation of GIS Disconnect Switch Considering External Environmental Factors.
Authors: He, Shuangyin1 (AUTHOR), Zhao, Jianli2 (AUTHOR), Qin, Chunxu1,3 (AUTHOR) qincx@imut.edu.cn, Cui, Guowei1 (AUTHOR), Han, Bing2,3 (AUTHOR)
Source: Energies (19961073). Jun2026, Vol. 19 Issue 12, p2758. 21p.
Subject Terms: *Resistance heating, *Solar radiation, *Wind speed, *Natural heat convection, *Sulfur hexafluoride
Abstract: To address the difficulty of directly measuring the internal conductor temperature and the complex influence of external environmental factors on gas-insulated switchgear (GIS), a three-dimensional thermal–fluid multiphysics coupling model was developed for a 110 kV three-phase common-enclosure GIS disconnect switch. The model incorporates contact resistance heating, natural convection of SF6 gas, wind speed, and solar radiation. The effects of contact resistance and environmental factors on the temperature field distribution were systematically investigated. The results show that an increase in contact resistance significantly raises the conductor temperature, while higher wind speeds effectively reduce the temperature rise of the equipment. Solar radiation substantially increases the enclosure temperature, whereas ambient temperature has little influence on temperature rise. Based on the enclosure temperature rise, a conductor temperature-rise prediction model and a multi-factor correction model were established. Validation results indicate that all models achieved coefficients of determination greater than 0.98, with prediction errors controlled within ±2 °C. The proposed method enables the accurate prediction of conductor temperature under complex environmental conditions and provides technical support for condition monitoring and overheating fault diagnosis of GIS equipment. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 194909207
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Study on Thermal–Fluid Coupling Simulation of GIS Disconnect Switch Considering External Environmental Factors.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22He%2C+Shuangyin%22">He, Shuangyin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Jianli%22">Zhao, Jianli</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qin%2C+Chunxu%22">Qin, Chunxu</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> qincx@imut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Cui%2C+Guowei%22">Cui, Guowei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Han%2C+Bing%22">Han, Bing</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)
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  Label: Source
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jun2026, Vol. 19 Issue 12, p2758. 21p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Resistance+heating%22">Resistance heating</searchLink><br />*<searchLink fieldCode="DE" term="%22Solar+radiation%22">Solar radiation</searchLink><br />*<searchLink fieldCode="DE" term="%22Wind+speed%22">Wind speed</searchLink><br />*<searchLink fieldCode="DE" term="%22Natural+heat+convection%22">Natural heat convection</searchLink><br />*<searchLink fieldCode="DE" term="%22Sulfur+hexafluoride%22">Sulfur hexafluoride</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To address the difficulty of directly measuring the internal conductor temperature and the complex influence of external environmental factors on gas-insulated switchgear (GIS), a three-dimensional thermal–fluid multiphysics coupling model was developed for a 110 kV three-phase common-enclosure GIS disconnect switch. The model incorporates contact resistance heating, natural convection of SF6 gas, wind speed, and solar radiation. The effects of contact resistance and environmental factors on the temperature field distribution were systematically investigated. The results show that an increase in contact resistance significantly raises the conductor temperature, while higher wind speeds effectively reduce the temperature rise of the equipment. Solar radiation substantially increases the enclosure temperature, whereas ambient temperature has little influence on temperature rise. Based on the enclosure temperature rise, a conductor temperature-rise prediction model and a multi-factor correction model were established. Validation results indicate that all models achieved coefficients of determination greater than 0.98, with prediction errors controlled within ±2 °C. The proposed method enables the accurate prediction of conductor temperature under complex environmental conditions and provides technical support for condition monitoring and overheating fault diagnosis of GIS equipment. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.3390/en19122758
    Languages:
      – Code: eng
        Text: English
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        PageCount: 21
        StartPage: 2758
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        Type: general
      – SubjectFull: Solar radiation
        Type: general
      – SubjectFull: Wind speed
        Type: general
      – SubjectFull: Natural heat convection
        Type: general
      – SubjectFull: Sulfur hexafluoride
        Type: general
    Titles:
      – TitleFull: Study on Thermal–Fluid Coupling Simulation of GIS Disconnect Switch Considering External Environmental Factors.
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            NameFull: Zhao, Jianli
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            NameFull: Qin, Chunxu
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            NameFull: Han, Bing
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            – D: 15
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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