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Li Ling Li Ling
Wuhan University
Computer Science & IT

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Numerical Calculation of Transient Thermal Characteristics in Gas-Insulated Transmission Lines Li Hongtao Li Hongtao; Shu Naiqiu; Li Ling Li Ling; Wu Xiaowen Wu Xiaowen
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 11, No 3: September 2013
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v11i3.945

Abstract

For further knowledge of the thermal characteristics in gas-insulated transmission lines (GILs) installed above ground, a finite-element model of coupling fluid field and thermal field is established, in which the corresponding assumptions and boundary conditions are given.  Transient temperature rise processes of the GIL under the conditions of variable ambient temperature, wind velocity and solar radiation are respectively investigated. Equivalent of surface convective heat transfer coefficient and heat flux boundary conditions are updated in the analysis process. Unlike the traditional finite element method (FEM), the variability of the thermal properties with temperature is considered. The calculation results are validated by the tests results reported in the literature. The conclusion provides method and theory basis for the knowledge of transient temperature rise characteristics of GILs in open environment.
Co-Authors Li Hongtao Li Hongtao Shu Naiqiu Wu Xiaowen Wu Xiaowen