基于模拟电荷法对500kV输电线路跨越民房时导线高度的计算

500 kV输电线路跨越民房时，民房处电场畸变成为制约输电线路对地高度的重要因素。文章采用模拟电荷法计算了不同排列方式的500 kV输电线路跨越不同高度民房时的电场，给出了满足4 kV/m控制限值的导线对地最低高度。结果表明，不同塔型下导线对地最低高度的变化与楼层高度的变化基本一致。上述结果为线路设计和了解输电线路跨越民房时的电场分布提供了参考数据。

Charge Simulation Method Based Calculation and Research on Conductor Heights of 500 kV Transmission Lines Passing over Residences

When 500 kV transmission lines pass over residences, the distorted electric field at the position where the residences locate become an important factor restricting the conductor heights of transmission lines. In this paper, the charge simulation method (CSM) is applied to calculate the electric fields produced by 500 kV transmission lines with different conductor configurations while the transmission lines pass over the residences with various heights, and the least conductor height above the ground that confirms to the control limit value of 4 kV/m is given. Research results show that the variations in the least above ground heights of conductors belonging to different types of towers are basically in accord with that in residence heights. This research result is available for reference in the design of transmission line and in the understanding of the distribution of electric fields while transmission lines pass over residences.