Enhancement of distance relay performance in transmission line compensated by series capacitor protected by MOV

Abstract EN

The normal distance relay face many challenges in a series compensated transmission lines the distance relay may give incorrect decision.

This paper present a digital distance relay designed by using wavelet transform (WT) to work with this compensated transmission lines.

The relay have another features to recognize between fault and disturbance cases, classify fault types and giving the trip signal to circuit breaker in a time less than period quarter.

The relay has been tested for both simulation cases and practically cases by simulation transmission lines board in the lab.