There are electrical contact points at both sides of the GIS basin insulator connected to the bus bar. The contact resistance may increase due to poor contact during the operation

resulting in abnormal heating and even cause a failure. In order to explore the temperature distribution of the basin insulator in operation

a 110 kV GIS basin insulator was used as a test platform. And a multi-layer simulation model of the basin insulator was established based on the platform parameters. The equivalent heat source was injected to simulate the heat transfer process of the conductor

SF6 gas

and GIS shell to the basin insulator

instead of convection and radiation. The single calculation time was reduced from hours to minutes using this method. The speed of calculation was effectively improved under the premise of ensuring the accuracy of the results. The temperature rise tests at 800

1 200

and 1 600 A load currents were carried out by the test platform. Infrared imager and thermocouples were used to measure the temperature distribution on the surface of basin insulator. The validity of the simulation model was verified by test data

and the regularity of simulation parameter settings under different load currents was summarized. Finally

compared with the simulation result of the single-layer model

the optimization result of the multi-layer model is closer to test data.