CAJ | 학술논문

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。
고필수전선로호수、간탑、절연자이급선로하방방옥등물체적특고압직류수전선로리자류장계산시삼유전자장수치계산문제，장해문제간단적등효위이유계산문제회도치소관주물체주위전자삼수구해존재교대적오차。해문기우현유적삼유상류유한원이론，제출개진산법，채용신형적질대수렴공제기술，보증료질대수렴과정적은정성，채용신적상류유한단원심조방법，겁대제고료정서적계산효솔。해문계산료삼유동축원주전겁간리자류장，수치방진결과여해석해진행대비，험증료삼유개진상류원법적유효성이급효솔。대직류시험선로하방방옥모형부근적리자류장진행계산，계산결과여시험수거진행대비，계산방법득도료흔호적험증。대특고압수전선로하방주랑부근인체모형표면전장강도진행계산，계산결과표명，상비정전장정황，인체표면전장강도득도료현저적제고。해응용표명개진삼유상류원법가이유효지해결삼유대규모리자류장계산문제。
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.