改进三维上流元法计算特高压直流线路离子流场(英文)  

Improved 3-D Upwind FEM for Solving Ionized Field of HVDC Transmission Lines

作　　者：黄国栋[1] 阮江军[1] 杜志叶[1] 余世峰[2] 廖才波[1] 金硕[1] 王国利 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072 [2]国家电网公司直流建设分公司,北京市西城区100052 [3]特高压工程技术(昆明、广州)国家工程实验室,广东省广州市510080

出　　处：《中国电机工程学报》2013年第33期152-159,19,共8页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划(973计划)(2011CB209404)~~

摘　　要：考虑输电线路弧垂、杆塔、绝缘子以及线路下方房屋等物体的特高压直流输电线路离子流场计算是三维电磁场数值计算问题,将该问题简单的等效为二维计算问题会导致所关注物体周围电磁参数求解存在较大的误差。该文基于现有的三维上流有限元理论,提出改进算法,采用新型的迭代收敛控制技术,保证了迭代收敛过程的稳定性,采用新的上流有限单元寻找方法,极大提高了程序的计算效率。该文计算了三维同轴圆柱电极间离子流场,数值仿真结果与解析解进行对比,验证了三维改进上流元法的有效性以及效率。对直流试验线路下方房屋模型附近的离子流场进行计算,计算结果与试验数据进行对比,计算方法得到了很好的验证。对特高压输电线路下方走廊附近人体模型表面电场强度进行计算,计算结果表明,相比静电场情况,人体表面电场强度得到了显著的提高。该应用表明改进三维上流元法可以有效地解决三维大规模离子流场计算问题。The ionized field of the high-voltage direct current （HVDC） transmission line is a 3-D Electromagnetic field when considering the influence of the lines sag, towers, insulators and buildings under the transmission line. Simplifying the problem by solving a 2-D ionized field would lead to a large error of the physical quantities around the object of interest. In this paper, improved 3-D upwind finite element method （upwind FEM） was achieved based on the existing theory. An adaptive iterative controlling factor was introduced to guarantee the rapid convergence of the solving procedure. A new method to find the upwind element was used to improve the computational efficiency. The ionized field of a 3-D coaxial cylindrical electrode was computed to testify the validity and efficiency of the method. The ionized field around the room model under the DC test line was calculated, and compared with the measurement results, and the calculation method was well validated. The electric field on the surface of the human body model which was placed on the corridor boundary under the ultra high-voltage direct current （UHVDC） transmission line was calculated, and the result demonstrates that the electric field is enhanced significantly compared with the situation in the electrostatic field. This application indicates that the 3-D large-scale ionized field can be handled using the improved 3-D upwind FEM effectively.

关 键 词：三维大规模离子流场 改进三维上流元法 自适应迭代控制因子 人体 房屋模型 

分 类 号：TM726[电气工程—电力系统及自动化]