Under the background of achieving the dual carbon goals

urban rail transit needs to achieve energy-saving and low-carbon operation. The existing traction power supply system (TPSS) with droop control strategy has some problems

such as low utilization rate of regenerative braking energy

lack of proactive and effective control and optimization measures for power flow. This paper analyzes the impact of droop parameters of the bidirectional converter on the power consumption of the system

and then proposes a collaborative control method to achieve optimal distribution of traction load power. This method optimizes and adjusts the droop parameters of the bidirectional converter in real-time

facilitating the flow of regenerative braking energy

effectively improving the utilization rate of regenerative braking energy

and significantly enhancing the system's collaborative control performance. Simulation calculations demonstrate that this method can save 17 million kW·h of electricity per year and effectively contributing to the safe and economical operation of the TPSS of urban rail transit.