Enhancement of Distance Relay Performance in Transmission Line Compensated by Series Capacitor Protected by MOV

Enhancement of Distance Relay Performance in TransmissionLine Compensated by Series Capacitor Protected by MOVAbstractThe normal distance relay face many challenges in a series compensatedtransmission lines the distance relay may give incorrect decision. This paper present adigital distance relay designed by using wavelet transform (WT) to work with thiscompensated transmission lines. The relay have another features to recognize betweenfault and disturbance cases , classify fault types and giving the trip signal to circuitbreaker in a time less than period quarter. The relay has been tested for both simulationcases and practically cases by simulation transmission lines board in the lab.Index Terms: Distance relay , fault detection , Series-Compensated Lines Protection,wavelet transform, MOV MOV .. [emailprotected] [emailprotected] . . . .Received: 2 5 - 2013 Accepted: 4 9 - 2013Prof. Dr. Maamoon F. AL-Kababjie Dhafer. A . AL_NuaimyDepartment of ElectricityUniversity of MosulMosul, Iraq[emailprotected] [emailprotected]