Research On Transformer Protection Based On ECT And Its Data Synchronization

This paper introduced the fundamentals and characteristics of electron current transformer and the rule of its interface with protector,also analyzed protecting setting calculation of transformer based on ECT,and got new curve of ratio brake.At the same time, this paper analyzed the fundamentals of transformer protection after using ECT.On one side, the paper searched on the theory of differential protective system based on ECT transformer's sampling,got the protection scheme from new TA configuration scheme.On the other side, the paper searched on the criterion of identifying inrush current coming from dc component, first harmonics and second harmonics after using OCT.At the end of this paper,researched on ECT data synchronization in transformer protection,and gave available synchronization schemes for transformer protection.