Abstract:
Ten years ago numerical relays started to replace electromagnetic
and static relays in Bule Nile grid . That was a revolution in protective
equipment in oldest grid in sudan .The purpose of this research is
documentation the development of distance protection relays in Bule Nile
grid which used electromagnetic YTG31 in phase one and static
Quadramho in second phase and numerical Micom P442 in phase three
for benefit of new engineers and researchers. The research review and
focuses in distant protection on power transmission lines between Kilo-x
and Rosires.
The research shows the relays setting calculations and advantages of
numerical protection relays over electromagnetic and static in distant
protection.
