Simulation calculation method and device for three-dimensional current-carrying capacity of complex cable system

The invention provides a complex cable system three-dimensional current-carrying capacity simulation calculation method and device, and the method comprises the steps: opening or constructing a three-dimensional geometric model of a complex environment cable system through simulation software; the convection and heat transfer physical field and the radiation field are added to the three-dimensional geometric model, boundary setting is carried out according to the characteristics of the three-dimensional geometric model, and longitudinal heat transfer and heat radiation conditions existing in the complex cable system are simulated; performing parameter scanning and sensitivity analysis on geometric parameters and thermodynamic parameters in the three-dimensional geometric model to determine an optimal simulation result and update the heat transfer and heat radiation models; and analyzing the specific longitudinal heat transfer and heat radiation characteristics of each boundary according to the optimal simulat