配电网馈线分支单相接地故障选线方法

Research on Single Phase to Ground Fault Line Selection in Distribution Network Feeder Based on Zero Sequence Current Variation

配电网一般情况下采用中性点不接地运行方式,但随着配电网馈线分支线路的增加,系统的电容电流也在不断增加,为补偿发生单相接地故障时的电容电流,需要投入消弧线圈。在投入消弧线圈的前后,健全分支线路和故障分支线路的零序电流变化特征不同,零序电流变化量可以作为筛选故障线路的依据。

In the distribution network, the use of neutral point is not grounded, but with the increase of the distribution network feeder branch line, the capacitor current is also increasing. The change of zero sequence current of the branch line and fault branch line can be used as the basis for selecting the fault line.