Author/Authors :
Li، نويسنده , , H.Y.، نويسنده , , Southern، نويسنده , , E.P.، نويسنده , , Crossley، نويسنده , , P.A.، نويسنده , , Potts، نويسنده , , S.، نويسنده , , Pickering، نويسنده , , S.D.A.، نويسنده , , Caunce، نويسنده , , B.R.J.، Caunce, نويسنده , , Weller، نويسنده , , G.C.، نويسنده ,
Abstract :
T: his paper describes a new technique for sampling
s~c~oni s a t iionn a numerical differential feeder protection relay.
The protection uses a Global Positioning System satellite receiver
for sampling synchronization at each end of the protected feeder.
The EMTP/ATP power system simulator was used to simulate a
typical distribution feeder with faults at various locations. The
current signals generated at both ends of feeder were used to
evaluate the pedormance ofthe protection. These tests were carried
out using a protection simulator. The results illustrate the effect of
current transformer saturation on the sensitivity and stability of the
protection. Finally it is shown that a precisely synchronized
differential protection is fast, selective and accurate. On an internal
fault it provides a high operating sensitivity, whilst it remains stable
on all external faults.
