不同电压等级同塔四回架设线下工频电场分布研究

Power Frequency Electric Field Distribution under Four-Circuit Transmission Lines on the Same Tower with Different Voltage Degrees

为研究不同电压等级线路同塔多回架设时线下工频电场分布,对运行的330 kV、110 kV同塔四回线路及分开架设时线下工频电场进行了实测,利用ANSYS有限元分析软件计算了同塔四回不同排列方式的线下工频电场。结果表明:330 kV、110 kV同塔四回架设较分开架设时线下工频电场分布得到明显改善;330kV、110 kV线路分别采用逆相序排列,且同侧上层330 kV与下层110 kV线路也为逆相序时,线下工频电场分布改善效果最佳。

To study the power frequency electric field distribution under four-circuit lines on the same tower with different voltage degrees,this paper measured the distribution of power frequency electric field under the operating four-circuit lines on one tower with the two voltage degrees： 330 kV and 110 kV,and measured that under the separated 330 kV and 110 kV double-circuit lines respectively.ANSYS finite element analysis software was applied to calculate the field distribution under four-circuit lines on the same tower with different line arrangement.The results show that compared with the separated double-circuit lines on the same tower,the power frequency electric field distribution under 330 kV and 110 kV four-circuit lines on the same tower was improved effectively.The optimal improvement effect occurred when 330 kV and 110 kV lines on the same tower,as well as the lines on the same side with different voltage degrees,were arranged in reverse phase sequence.