80 Mvar集合式并联电容器内部温度场数值计算分析

Calculation Analysis on Internal Temperature Field Algorithm of 80 Mvar Assembled Shunt Capacitor

为了获得1.2倍额定电压、环温55℃运行工况下集合式并联电容器内部温度分布,本文运用有限体积法,以集合式并联电容器BAMH126.3/3^(1/2)-80000-1W为研究对象,根据实际真实电容器尺寸,用流体力学仿真软件Fluent建立其三维温度场仿真模型,对其温度分布进行仿真。得到了其整体内部温度场分布,仿真结果表明,集合式并联电容器内部温度由底部至顶部呈上升趋势,且最热点温度位于顶层心子内部,变压器油温度最高点位于散热器顶部,最低点位于散热器底部,为集合式并联电容器散热结构优化设计和内部温度最热点控制提供参考。

For obtaining the internal temperature distribution of the assembled shunt capacitor under the operation condition of 1.2 times rate voltage and ambient temperature of 55 ℃, in this paper, finite volume method is used and the assembled shunt capacitor BAMH126.3/3-（1/2）-80000-1 W is taken as study object,the simulation model of 3D temperature filed is set up to simulate its temperature distribution as per the actual size of capacitor and by the use of hydromechanics simulation software Fluent. The overall internal temperature filed distribution is obtained. It is shown by the simulation result that the internal temperature of the assembled shunt capacitor is on the rise from bottom to the top and the temperature at the hottest point is inside the core of the top.The highest point of the transformer oil temperature is on the top of radiator and the lowest point at the bottom of the radiator, which provide reference for the optimization design of the capacitor radiator structure and control of the hottest point of internal temperature of the assembled shunt capacitor.