有限元电场计算时模型表面网格精细控制方法  

Precise mesh control method on model surface for finite element electric field calculation

作　　者：田雨[1] 杜志叶[1] 柳双 金硕 蒙绍新 金颀 周文峰 TIAN Yu;DU Zhiye;LIU Shuang;JIN Shuo;MENG Shaoxin;JIN Qi;ZHOU Wenfeng(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,China;State Key Laboratory of Power Grid Environmental Protection,China Electric Power Research Institute Wuhan Branch,Wuhan 430074,China)

机构地区：[1]武汉大学电气与自动化学院,湖北武汉430072 [2]湖北工业大学电气与电子工程学院,湖北武汉430068 [3]中国电力科学研究院有限公司武汉分院电网环境保护国家重点实验室,湖北武汉430074

出　　处：《电力自动化设备》2019年第11期205-210,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51477120,51741708)~~

摘　　要：大型复杂模型有限元电场求解过程中,所关注设备表面网格的精细化控制往往难度较大。为此,对有限元电场数值计算时网格划分的相关基本原则进行讨论,考虑实体模型的基本几何结构,提出了基于多层外包实体实现设备表面网格精细控制的思想,在此基础上研究了有限元建模方法。以简单三维模型为例,分别介绍了外包实体生成算法、区域划分原则及相关操作流程。以标准模型为例介绍了所提方法的具体应用过程,同时对外包实体的参数设定进行了讨论。将该方法应用于±1100 kV特高压换流站直流阀厅设备表面电场计算中,计算所得模型表面电场过渡平滑,电场强度最大值为13.8 kV/cm。该方法有效实现了模型表面网格的精细控制,对大型复杂有限元模型的高效、精确建模具有一定的指导意义。In the process of solving electric field of the large and complex finite element models,the precise mesh control of the concerned equipment surface is often difficult.To overcome this problem,the basic principles of meshing in the numerical calculation of finite element electric field are discussed,considering the basic geometric structure of the entity model,the idea of precise mesh control based on multilayer external surround entities for equipment surface is proposed,based on which,an effective finite element modeling method is developed.Taking a simple three-dimensional model as an example,the algorithm of external surround entities generation,the principle of regional division and related operation process are introduced.Taking the standard model as an example,the specific application process of the proposed method is introduced,and the parameter setting of the external surround entities is discussed.The proposed method is applied to the calculation of surface electric field of DC valve hall in±1100 kV UHV converter station.The calculated surface electric field is smooth,and the maximum electric field intensity is 13.8 kV/cm.The proposed method can effectively realize the precise mesh control of the model surface,and has certain guiding significance for the efficient and accurate modeling of large and complex finite element models.

关 键 词：外包实体 网格控制 有限元法 电场计算 特高压阀厅 模型 

分 类 号：TM501[电气工程—电器]