Directional zero-sequence power protection 零序功率方向保护
zero-sequence directional protection 零序方向保护
pilot zero sequence directional protection 纵联零序方向保护
zero sequence directional power protection 零序功率方向保护
zero sequence current directional protection 零序电流方向保护装置
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。
Different conditions causing the sensitivity deficiency of pilot zero-sequence directional protection are analyzed and the necessity of adopting zero-sequence voltage compensation is discussed.
讨论了纵联零序方向保护因为零序电压灵敏度不足而失效的各种情况，探讨了采用零序电压补偿措施的必要性。
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