Journal of Electrical Engineering ›› 2021, Vol. 16 ›› Issue (1): 166-172.doi: 10.11985/2021.01.021

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Simulation Research on DC Traction Power Supply System for Renewable Energy Utilization of Urban Rail Transit

XIAO Zilin()   

  1. China Railway First Survey and Design Institute Group Co., Ltd., Xi’an 710043
  • Received:2020-07-22 Revised:2021-01-01 Online:2021-03-25 Published:2021-03-25

Abstract:

In the simulation process of DC traction power supply system, the simulation effect of energy storage unit is not good, so the simulation result of DC traction power supply system is quite different from the measured result. Therefore, the simulation method of DC traction power supply system for renewable energy utilization of urban rail transit is proposed. According to the characteristics of bidirectional DC/DC converter and the principle of Buck working mode, the simulation of energy storage unit is analyzed; the equivalent model of traction network is used to calculate the DC traction force of vehicle; through the above two parts, the node voltage method and Gauss elimination method in the calculation of electrical power flow are used to obtain the voltage of each node of the system, and the simulation design of DC traction power supply system based on renewable energy is completed. Compared with the traditional method and the measured results, the numerical value of this method is close to the measured results in current dynamic simulation and energy feedback simulation.

Key words: Energy storage unit, renewable energy, urban rail transit, DC traction power supply

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