The validity check of zero-sequence operating direction for transformer directional over-current protection is also essential.

另外还需要进行变压器零序方向过电流保护动作方向正确性的检查。

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Moreover, the sensitivity of turn-to-turn fault of shunt reactor protection was analyzed and a method of adaptive compensated zero sequence direction was presented.

分析了电抗器保护匝间短路灵敏度，提出了自适应补偿零序功率方向的方法。

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