Zonal protection of transmission line model

Transmission lines play a very important role in power system by transmitting bulk power in the system. They are important for the reliability, stability and economic operation of the power system. Also transmission lines are most frequently subjected to faults, as they are in the open areas. Therefore protection of transmission lines is vital for security of the power system. zonal impedance protection of the transmission line is used widely for the purpose. Now a days numerical relays are used in the place of conventional relay, which are sophisticated and clearly dominate the conventional system. the work aims at configuring GE make D60 numerical relay to protect a 360km long transmission line model in the laboratory. The work shows the advantages offered by the numerical relays for protection of transmission line model over the conventional relay system. The work also shows the advantage of communication facilities in the numerical relays.