Under the "dual carbon" strategic goal

saving energy consumption in railway transportation and optimizing the power supply system have become the main development directions for energy structure adjustment. The traditional railway traction power supply system has problems such as insufficient renewable energy acceptance capacity and waste of regenerative braking energy

making it difficult to effectively control the impact on the public power grid. To achieve the upgrading and replacement of railway traction power supply system

research is conducted on key technologies for new railway traction power supply based on energy storage technology. An energy storage technology suitable for railway traction power supply was analyzed and proposed

and the research progress of key technologies based on energy storage in railway traction power supply systems was analyzed. Furthermore

while summarizing the challenges faced by current research

the future development direction was also discussed.