An adaptive impedance relay based on negative sequence voltage polarization is proposed, and its operating characteristic is analyzed.
提出了一种基于负序电压极化的自适应接地阻抗继电器方案，并对其动作特性进行了分析。
2
The scheme includes the transverse differential protection, the directional relay action on negative sequence power of fault component and the incomplete differential protection.
该方案包括了横差保护、故障分量负序功率方向保护和不完全纵差保护的综合应用。
3
The negative sequence distance relay gets free from the winding connection of the transformer. So it is the best choice to use the kind of the distance relays for the transformer backup protection.