直流电晕笼中离子流场的计算  

Calculation of the Ion Flow Field in the DC Corona Cage

作　　者：尹晗[1] 郭剑[2] 张波[1] 刘元庆[2] 何金良[1] 

机构地区：[1]清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,北京100084 [2]中国电力科学研究院,北京100192

出　　处：《高电压技术》2011年第3期758-764,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2011CB209401)~~

摘　　要：直流电晕笼是研究直流特高压输电电磁环境问题的重要试验设备,为了更好地分析直流电晕笼,从而更好地为直流特高压输电建设服务,有必要对直流电晕笼中的空间电荷、合成电场以及离子流等参量进行计算仿真。因此以Kaptzov假设为基础,将模拟电荷法与迎风差分有限元法相结合,对直流离子流场进行了仿真,通过与现有文献中的电晕笼实验数据的比对,验证了仿真算法的有效性,并由此给出了典型单、双极直流电晕笼中的离子流场计算结果。仿真结果表明,单、双极直流电晕笼中的空间电荷分布存在较大差别,单、双极电晕笼试验的等效性有待进一步探讨。该算法求解速度快、稳定性好、计算精度较高,对于分析直流电晕笼试验具有一定的参考价值。DC Corona cage is one of the most important test equipments to study the related electromagnetic environment problems of the ultra high voltage DC（UHVDC） transmission lines.In order to improve the analysis of DC corona cage which could contribute more in the construction of the UHVDC programs,it is necessary to simulate the space charge,electric field,and ion flow in the DC corona cage.On the basis of the Kaptzov＇s assumption,we combined the charge simulation method with the upstream finite element method and simulated the DC ion flow field of the DC corona cage.By the comparison of the calculated results and the experimental results in previous literatures,the validaty of the algorithm was verified.The calculated results of the typical monopolar and bipolar DC corona cages were given out.The simulation result showed that the space charge distributions in the monopolar and bipolar DC corona cages were different,and the equivalence of the tests of these two types of corona cages needed to be further studied.This algorithm runs fast,stably,and accurately,which has certain reference value in the analysis of the DC corona cage tests.

关 键 词：直流电晕笼 电晕效应 空间电荷 电场强度 离子流 迎风有限元法 

分 类 号：TM721.1[电气工程—电力系统及自动化]