同塔多回输电线路最优相序排列方式

Study on Optimal Phase Sequence of Multi-circuit Transmission Lines on Same Tower

电力系统中的诸多因素与线路相序有关,同塔多回输电线路导线排列方式众多,从中选取最优相序非常困难。为了减小同塔多回输电线路运行时的不平衡度及电磁环境的影响,以同塔四回输电线路为例,利用Matlab对同塔四回线路的1 296种相序下的工频电场、工频磁场、无线电干扰、可听噪声以及线路不平衡度进行了仿真。通过建立关于线路电磁环境及不平衡度的目标函数,并根据它们在实际工程中的不同重要程度设置不同的权重系数,得出了同塔四回线路在综合考虑电磁环境和不平衡度时的最优相序排列方式。该计算方法与结果可为实际工程中输电线路的优化设计提供参考。

The many factors of power system are related to the line phase sequence and multi-circuit transmission lines arrangement is various, so it is very difficult to select the optimal phase sequence. This paper takes the quadruple-circuit transmission lines as an example, and makes the simulation of the power frequency electric field, power frequency magnetic field, radio interference, audible noise and line imbalance under the 1 296 kinds of the phase sequence of the quadruple-circuit lines. Through the establishment of the objective function about line electromagnetic environment and imbalance, the paper determines different weight coefficient depending on their importance in the practical project, and gets the optimal phase sequence of the quadruple-circuit lines based on the comprehensive consideration of the electromagnetic environment and imbalance.