Abstract: Indian Railway is one of the biggest consumer of electricity; it has a largest network of electrification in India. Each Traction Sub-Station(TSS) is located at a distance of 40 to 60 K.M. from other T.S.S, each T.S.S. has its own feeding zone and separate metering. Various tariff structures are followed in the market by different types of electricity consumer, but Railway follows the two part structure. In this structure, the total billing charges are split into two charges i.e; constant charges and variable charges. During Parallel operation of two adjacent Traction Substations (TSS) the Maximum Demand (MD) recorded in TSS having larger Train load is less and Maximum Demand recorded in TSS having light Train load is somewhat high as compared to De-parallel operation. This Suppression of Maximum Demand effect the total electricity bill of that particular TSS.

Keywords: Traction Substations (TSS), Neutral Section (NS), Maximum Demand (MD), two part tariff.