超高压输电线路在复杂场景下工频电场的分区域算法

Subdomain algorithm of power frequency electric field for EHV power transmission line under complex scenes

在超高电压等级情况下,输电工程引起的电磁环境问题备受关注。在模拟电荷法的基础上提出分区域算法,将超高压输电线路在复杂场景下的计算区域划分为2个子区域,并在虚拟边界面设置模拟电荷作为子区域间的耦合条件。通过对双回输电线路下存在建筑物时的工频电场进行实例计算,结果验证了该算法的正确性和有效性,由效率对比可知分区域算法在保证精度的前提下能有效提高计算速度并减少计算内存。利用分区域算法对输电线路下存在树状物时的工频电场进行计算,计算结果与理论分析结果一致。可见,分区域算法在复杂场景下超高压输电线路的电场计算中有较好的应用前景。

In the case of EHV（ Extra High Voltage） grade,the electromagnetic environment problem caused by the transmission projects has attracted much attention. A charge simulation method-based subdomain algorithm is proposed,based on which,the calculation area of EHV power transmission line under complex scenes is divided into two sub-regions and the simulation charges are set at the virtual boundary as the coupling condition between sub-regions.The power frequency electric field of double-circuit transmission lines with buildings under them is calculated,and the results verify the correctness and effectiveness of the proposed algorithm. By comparing the efficiency,it can be seen that the proposed algorithm can effectively improve the computing speed and reduce the computational memory with the premise of accuracy. The subdomain algorithm is used to calculate the power frequency electric field of transmission lines with dendrimers under them,and the calculative results agree with the theoretical analysis. So,the proposed algorithm has a good application prospect in the power frequency electric field calculation of EHV transmission lines under complex scenes.