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A Novel Hybrid Energy Storage Topology and its Power Sharing Algorithm
Pages: 128-135
Year: Issue:  12
Journal: Transactions of China Electrotechnical Society

Keyword:  Hybrid energy storagepower sharingactive balanceMMC topology;
Abstract: Topology and power sharing algorithm are two important issues in hybrid energy storage research. In this paper, a novel hybrid energy storage topology based on modular multilevel converter is proposed and a modified carrier-cascaded PWM method is used to realize active voltage balance between energy storage modules. In the research of power sharing algorithm, disadvantages of low pass filter method are summarized, which is the most commonly used strategy for power sharing. A novel power sharing strategy is compared to this method by simulation and experiment. Simulation result is gained on MATLAB/SIMULINK platform. Both short time and long time operation experiment result are gained on a low capacity experimental energy storage device.
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