An integrated adaptive distance relaying scheme in series compensated transmission lines

Abstract

The introduction of the capacitance in series with the line reactance adds certain complexities to the effective application of impedance based distance relays. The paper reviews series compensated line protection challenges and present modern solution to improve the distance relay performance. The work presents development and evaluation of an integrated adaptive distance protection scheme. Development of the proposed scheme is in the specific area of incorporating the Adaptive features like adaptive Relay setting as the compensation level changes in the series compensated lines of the transmission system for optimum reliability. Upon extensive testing on different data set of fault cases with fault resistance and varying percentage compensation level, performance of the developed method ensures that the proposed scheme overcomes the overreach/underreach problem of the distance relay in series compensated lines and is found to be quite promising.