架空避雷线分流变电站入地电流的简易计算

A Simple Calculation for the Part of Earth - fault Current Shunted by the Over - head Lightning Conductor from the Substation

高压送电线路的架空避雷线因防雷直接联接到变电站和线路杆塔的接地网,从而也将变电站内接地故障的入 地电流分流到站外,减少站内的入地电流。本文对分流作用提出一个简易的计算方法,可供变电站设计时作参考。

To avoid lightning, the overhead lightning conductor must be connected directly with the grounding net of the substation and the line tower. As this connection can shunts a part of earth - fault current from the substation to outside, so another part inside the substation would be reduced. The author presents a simple way to calculate the shunt function in this paper, and it could be used for designing substation as a reference.