It is immune from the unbalanced status of network and the values of earthed resistance. To the complicated intermittentarc-earth fault, the proposed method also works well.
该方法不受电网平衡情况和接地电阻大小的影响，对复杂的间歇性电弧接地故障同样有效。
2
The reduction of the residual current of the ground-fault point is beneficial to the extinction of the grounding arc and to the reduction of the intermittentarc grounding over voltage.
减小接地故障点的残流有利于接地电弧的瞬间熄灭及降低间歇性电弧接地过电压。
3
The influences of several factors such as harmonics, intermittentarc grounding, ct, load and fault resistance have been thoroughly analyzed, therefore, it is fundamental work for its application.