Transmission Line Protection Using Numerical Relay

Abstract

The objective of this research to study and understand the technology and function of the latest developed relays with the main focus on the preparation of the relay setting and uploading them in the relays and check correct operation of the relay’s zones. The thesis first describes the protection system of the transmission lines with the recently constructed high voltage transmission line linking shagara 110KV substation with Local market high voltage 110KV substation. This line is protected using numerical relays type MicoM P442. The thesis then describes the theory of distance protection together with the evolution of protective relay. The function of numerical relays type P442 is described. Data is collected from the transmission line and calculated the setting to fed to the relay by using software (MicoM Studio). According to the data which inserted to the numerical relay has been excepted the relay operated in corrective zone’s without made any overlap with other zones. Lastly conclusion and recommendation are made.