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| Analyzing and Comparing Bi-Direction DC-DC Converters for Ultra-Capacitor Based Energy Storage System in Urban Rail Transit |
| Wu Wei, Xie Shaojun |
| Nanjing University of Aeronautics and Astronautics Nanjing 210016 China |
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Abstract Energy storage system is an important measure to absorb the regenerating energy of urban vehicles and release the energy when the train starts. The bi-direction DC-DC converter is one of the critical parts in energy storage system, and it plays an important part in improving the performance and efficiency of the system and reducing the volume and weight of the whole system. This paper presents an analysis, design, and comparison study of several bi-directional non-isolated DC-DC converter topologies that could be considered potential candidates for the power electronic interface of energy storage system in urban rail transit. The analysis and design of the converters is performed throughout equations for the stresses of the active components and the storage capacity of the passive component. Finally, the advantages and disadvantages of these topologies are summed up, and the applicable occasions of the topologies are also pointed out.
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Received: 21 September 2012
Published: 12 December 2013
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2013, Vol. 28 
