LTD及其次级复合绝缘电场的简化仿真方法研究  

作　　者：雷伟群 刘冠芳 耿涛 

机构地区：[1]中车永济电机有限公司轨道交通牵引电机山西省重点实验室,山西运城044502

出　　处：《科技创新与应用》2021年第16期33-35,39,共4页Technology Innovation and Application

基　　金：山西省关键核心技术和共性技术研发攻关专项项目(编号:2020XXX012)资助。

摘　　要：首先导出了微秒级LTD(Linear Transformer Driver)中常用的浸渍剂——薄膜多层复合柔性绝缘套管的等效介电常数,然后将绝缘套管整体按具有该等效介电常数的厘米量级厚度单层介质处理,得到LTD及等效套管绝缘内部各处的场量,再经简单换算得到套管绝缘内各层的仿真电场。研究发现,该方法不仅可以使径向剖分网格节点数从10^(5)量级减少到10^(3)量级(全场二维节点数从10^(11)量级减少到10^(6)量级),而且对仿真精度影响不大。计算显示,一般台式计算机即可胜任LTD全尺寸二维电场数值仿真计算,计算时间仅为1小时左右。The equivalent permittivity of multi-layer impregnated-polymer-film insulation structure used in microsecond LTD has been derived first for simplifying the full-scale electric field simulation of the LTD.Further,by supposing that the insulation was substituted for by centimeter-level single-layer dielectric whose permittivity equals the equivalent one of the whole insulation,the electric field in the substitutive insulator can be much easily computed numerically and converted into the value of the field in the simulated insulator.This method reduces dramatically(more than 4 to 5 orders of magnitude)the scale of the two-dimensional field mesh grids from hundreds of billions to several millions,so that a desktop computer is competent to accomplish numerical simulation of two-dimensional electric field in a full size LTD within 1 hour or so.

关 键 词：LTD 分层绝缘 柔性套管 电场仿真 等效介电常数 

分 类 号：TM215[一般工业技术—材料科学与工程]