它也可与负序电流突变量起动元件配合，构成一套变压器主保护。
It can be combined with a set of transformer main protection by combining negative-phase sequence current sudden-change starting element.
本文提出的浮地频变负阻新电路具有有源和无源元件少、灵敏度低、稳定性好、无需调整和易于实现等优点。
A novel realization of floating FDNR proposed in the paper has advantages such as fewer passive and active elements, lower sensitivity, good stability, no need of adjustment, easy realization.
由于同杆双回线自身的特殊性，使得在常规线路保护中有着广泛应用的负序方向元件的性能受到影响。
The performance of negative sequence directional element widely used in conventional transmission line protection may be affected when it is used in the double transmission lines on the same tower.
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