A Method for Estimating Busbar Temperature Rise Based on Lumped Parameter Model

The use of high current DC transmission busbar to supply power to superconducting magnets is a common method of fusion power supply technology. Long term steady-state operation of high current busbar often results in severe heating of the busbar conductors, which seriously affects the safety and stable operation of the power supply. Therefore, in busbar design, it is necessary to estimate the steady-state temperature rise of the busbar and control the steady-state operating temperature of the bus to within 60 degrees. This paper takes the bipolar high current busbar as the research object, determines the thermal resistance of the busbar under certain operating conditions through experimental methods, establishes a lumped parameter model for the operating temperature rise of the busbar, predicts the steady-state operating temperature rise of the busbar, and has important reference significance for the design and operating conditions of the busbar conductor temperature rise.