To effectively monitor GIL bus connector temperature

finite element model of the electromagnetic field

fluid field and temperature field coupling calculation of GIL busbar connectors in the GIL bus junction including the outside air are established based on the horizontal structure and the assembly structure of 90°corner unit. The temperature-related Joule heat loss is iteratively calculated

and the temperature rise is calculated by mapping the region to the temperature field and the fluid field. Boussinesq model is used to simulate the temperature field variation caused by natural convection of SF

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gas and air in GIL busbar shell. The influence of the operating current and the busbar structure on the temperature rise of the GIL bus joint and the shel

l is studied by using the model. The results show that there is a temperature sensitive point on the inner surface of the shell under the action of gas convection. The conclusion provides a reliable theoretical basis for GIL design and GIL busbar junction temperature monitoring.