Effect of intermediate substation configurations on reliability of power transmission corridor

Abstract

Reliability of power transmission corridor is of great importance for the reliability of the bulk power system. Any intermediate substation in the transmission corridor affects its reliability. Studies have been done on reliability of substation in isolation but its effect on transmission corridor has not been studied. Studies on transmission line reliability have also been carried out, but they focused on system connectivity neglecting reaction of system protection. This paper studies the reliability of a transmission corridor with intermediate substation having different configurations. Event tree analysis has been adopted for the purpose. The effect of substation configuration on reliability of the transmission corridor, both qualitatively and quantitatively, is analysed and compared.