Abstract:
In recent years the using of microprocessor and digital signal processing
technology in the numerical distance relays expand the applications of the
distance protection to protect the transmission lines.
A new
high voltage transmission line (220KV) has recently been
constructed to fed Elobied city with the electrical supply from Rabak city
substation, where the numerical distance protection relay REL511*2.3 has
been used to apply the distance protection to protect such line. Data was
collected from the transmission line and fed to the relay and also the other
relay settings which have been calculated were fed to the relay by using the
computer application program CAP540.
Results of three phase fault in zone 1 were obtained and finally conclusion
and recommendations were made.