The Power Flow Simulation and Calculation Method for Metro Power Supply System Based on the Train-Network Coupling

Based on the analysis of the equivalent models of the traction transformer and the train in the existing metro power supply system (MPSS), this paper embeds the coupling relation between the metro traction power supply system (MTPSS) and the train operation into the model and combines with the corresponding range of the output current, the voltage and the resistance of the 6 section type equivalent external characteristic curve of the 12-pulse rectifier unit to research and design the AC/DC power flow calculation method for the MPSS, this paper analyzes the operation efficiency and the power flow calculation error of the method. The result shows that this method can effectively improve the accuracy of the power flow value calculation and has the advantages of the fast calculation speed and the good real-time performance, besides the model can describe coupling relations between the train and traction network more accurately.