It is found that the two parameters aren't influenced by external fault and magnetizing inrush current, which ensures good selectivity.
理论上分析可以得到，这两个参数不受外部故障和励磁涌流的影响，因此具有很好的选择性。
After an external fault of transformer is cleared, the transient flux may enter into the saturation region, and a recovery inrush may be produced.
变压器外部故障切除后，暂态磁通可能超过变压器铁心的饱和点，从而产生一定的恢复性涌流。
Troubleshooting ideas: first, in principle, rule out the control circuit fault - and then ruled out engine failure itself - after the exclusion of other external fault.
排除故障思路：原则上先排除控制电路故障——再排除发动机自身故障——后排除其它外部故障。
The fault model including the parameters of shunt reactors is established, which is accurately equal to external fault in principle, but hardly applied to current real devices.
通过建立包含电抗器参数的故障模型，在理论上可以精确等效外部故障，但难以在目前的实际装置中应用。
The fault model including the parameters of shunt reactors is established, which is accurately equal to external fault in principle, but hardly applied to current real devices.
通过建立包含电抗器参数的故障模型，在理论上可以精确等效外部故障，但难以在目前的实际装置中应用。
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