Review on Energy Management Strategies of On-Board Hybrid Energy Storage Systems for Urban Rail Vehicles

With the increasing energy consumption of urban rail transportation, the on-board hybrid energy storage system, which integrates various energy storage technologies, can effectively recycle the regenerative braking energy. It not only solves the problems of voltage increase, temperature rise, and energy consumption increase caused by the energy inversion feedback and braking resistor heat dissipation, but also compensates for the inability of a single energy storage technology to meet the energy and density needs of urban rail vehicles at the same time. This paper first illustrates the composition, topologies and applications of the hybrid energy storage system. Then various energy management strategies of the on-board hybrid energy storage system for urban rail transit are introduced in detail. The characteristics, advantages and disadvantages of different control strategies are analyzed and summarized. Finally, the conclusions make an overall comb and prospect about the paper which lay a certain foundation for the future research of the on-board hybrid energy storage system for urban rail transit.