Prediction of temperature rise of eco-friendly GIS with electromagnetic-thermal coupled analysis

In this paper, temperature distribution of GIS that filled with eco-friendly gas is predicted through numerical analysis when the rated current flows. Temperature rise is predicted using electromagnetic-thermal coupling analysis. The heat sources causing the temperature rise are joule losses in the main conductor during the flow of rated current, and eddy current losses of enclosure caused by the magnetic flux interlinkage created by the rated current and are calculated by electromagnetic analysis. The calculated power losses are used as the heat source of analysis to predict the temperature rise of GIS. The validity of prediction method is verified by comparing with the test results.