进线柜结构三维电磁场及耦合热场分析

Analysis and Calculation of Electromagnetic Coupling Thermal Field for Inlet Cabinet

作为大电流输配电系统,进线柜的发热温升和散热问题是影响其工作稳定性的重要因素之一,为此本文建立了进线柜的电磁场——耦合热场分析模型。从电磁场的MAXWELL方程出发,根据电磁场的边值问题及变分公式建立了有限元方程组,计算三维电磁场的有限元单元方程的解析表达式,分析计算出进线柜母排结构耦合散热场分布及绝缘支撑子绝缘耐压情况。

As the big current power transmission and distribution system,temperature rise or thermal problem of the line cubicle is one of the important factors that affect the operating stability,this paper has established the cubicle electromagnetic fields-coupled thermal field analysis model.Starting from Maxwell's equations of electromagnetic field,according to the electromagnetic field boundary value problem then the variational formula of the finite element equations has been established,use the unit equation analysis to calculate the coupled thermal field distribution of line bus structure and insulation support to high voltage condition.