线路模型对同塔短线路潜供电流研究的影响

同塔双回短线路在电磁暂态研究中具有多种建模方法，线路模型的选择直接影响潜供电流的计算结果。建立4机系统对同塔双回短线路的潜供电流进行仿真，对比分析了EMTP（电磁暂态程序）中输电线路的3种建模方法在潜供电流稳态值校核与暂态过程研究中的差异，并结合理论分析了引起各模型计算差异的原因，给出了同塔双回短线路潜供电流研究的线路模型选取建议。

Influence of Overhead Line Models on the Secondary Arc Current Research of Double Circuit Overhead Lines on the Same Tower

There are many modeling methods for the short double circuit overhead lines on the same tower in the electromagnetic transient analysis. The modelling methods directly influence the simulated results of of the secondary arc current. In this paper, the simulation models of four-generator system including the short double circuit overhead lines are built by the EMTP (Electro-Magnetic Transient Program) software for simulating the secondary arc current. The differences among the three kinds of line models in EMTP are compared in the steady state calculation and transient state research. Based on the theoretical analysis, the explanations for the differences of the three models are discussed. Besides, the suggestions of model selection in secondary arc current research for the short double circuit overhead lines on the same tower are given in the paper.