Abstract
Light rail is developing very fast in China. With the help of battery-based energy storage system, the light rail vehicle will perform much better than before. Light rail vehicle energy storage system links lithium battery and DC-link together, and energy flow two-way through it. The topology of the energy storage system is studied and its working principle is analyzed. The lithium battery is a very suitable energy storage device for the energy storage system for its good charging and discharging characteristics. A double closed-loop including a voltage loop and a current loop is developed to control the energy storage system. The simulation in the MATLAB shows that the energy storage system coordinates very well with the other subsystems in the light rail vehicle in all working conditions.
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