Power Flow Analysis of DC Train Substation System

The increased number of electric train passengers causes the increased number of DC electric train trips. The increased number of DC electric train trips must be supported by the capability of DC train substations. So, the DC train substation system needs to be analyzed for its power flow. The power flow analysis of the DC train substation system is more complex than the conventional network because electric trains have dynamic load characteristics. This paper presents the power flow analysis for a DC train substation system with the characteristics of the mechanical and physics sides of train motion. Calculation of power flow using the Current- Inj ection method, and with headway variations in the morning and afternoon peak loads. The DC train substation analyzed in this paper is Pasar Minggu, modeled with the two closest DC train substations. The calculation results show that with headway variations, the highest power of traction transformer and silicon rectifier occurring during the morning peak load, the highest catenary drop voltage is still within tolerance limits, and the electric train operates normally.