Due to the differences of subway train running interval in time scale and space scale, the load of subway power supply network is not evenly distributed in time and space, which results in the unbalanced load of power supply network lines and main transformers, reducing the reliability of power supply network. By analyzing the structure of subway power supply network, this paper firstly establishes the station load model based on the train timetable and then based on this station load model, a multi-objective optimization model was constructed with the objective function of minimizing weighted network loss, voltage drop and load unbalance, and the power supply network reconfiguration was realized by switching and switching operation. Finally, the optimization model proposed in this paper is verified and analyzed by a subway power supply network.

power supply network modeling; load modeling; subway operation timetable; power supply network reconfiguration