5500 A船用低压主配电板散热设计

Heat dissipation design of 5500 A marine low-voltage main switch board

基于热传导微分方程、流体运动控制方程及辐射换热方程,建立了低压主配电板耦合传热的数学模型,数值计算了低压主配电板稳态工况下的三维温度场和气流场,指出了载流回路中温升最高部位和内部气体流动规律,分析了低压主配电板三维温度场及气流场分布,并在此基础上对互感器安装位置、百叶窗尺寸进行了优化,为同类交流低压大容量主配电板设计提供了参考。

Based on the heat conduction differential equation,fluid motion control equation and radiation heat transfer equation,this paper establishes the mathematical model of coupled heat transfer of low-pressure main distribution board.The three-dimensional temperature field and air flow field of low-pressure main distribution board under steady-state conditions are numerically calculated.This paper points out the maximum temperature rise and internal gas flow law in the current carrying circuit,and analyzes the three-dimensional temperature field and air flow field distribution of low-pressure main distribution board.On this basis,the installation position of transformer and the shutter opening are optimized,which provides a reference for the design of similar high-power low-voltage main distribution board.