initial short-circuit current
起始次暂态短路电流 Initial subtransient short-circuit current
利用电磁暂态程序emtp进行机理分析的结果认为：短路电流起始相位的随机性以及互感器铁心剩磁方向的随机性会导致上述现象的出现。
With simulation by emtp it shows that both the random initial phase of short circuit current and the random direction and value of residual magnetism are the reason of above-mentioned phenomenon.
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