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Research on Steady‐State Thermal Behavior of SF 6 / N 2 and CF 3 I / N 2 Mixtures in High Voltage Gas‐Insulated Lines ( GIL )
Author(s) -
Jianying Zhong,
Zhijun Wang,
Bo Zhang,
Yongqi Yao,
Yapei Liu
Publication year - 2021
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.23324
Subject(s) - multiphysics , overheating (electricity) , thermal , magnetic field , steady state (chemistry) , engineering , finite element method , electrical engineering , physics , chemistry , thermodynamics , structural engineering , quantum mechanics
Gas‐insulated lines (GIL) are widely used due to their many advantages in power plants and substations. The security and reliability of GIL is achieved by continues testing and monitoring. The main fault in the GIL compartments is overheating, which is rarely to occur, nonetheless, it cannot be ignored. In the present study, GIL steady‐state thermal behavior was investigated. For this reason, a multiphysics finite element model (FEM) was built to analyze the magneto‐hydro‐thermal characteristics of the GIL insulation gas. The simulation coupling includes the electromagnetic field, flow field and thermal heat transfer field. SF 6 /N 2 and CF 3 I/N 2 mixtures were studied and the influence of different gas properties on the magnetic flux density, heat distribution and flow velocity had been investigated. The results were compared to an experimental setup to validate the model calculations. Temperature rise tests have been conducted on the GIL inner and outer shell. The measurements were in good agreement with the simulation results. Finally, the presented work is also to serve as a good reference in future design and optimization of GIL structure. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.