Energy Sharing Control Scheme for State-of-Charge Balancing of Distributed Battery Energy Storage System
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- 17 October 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industrial Electronics
- Vol. 62 (5), 2764-2776
- https://doi.org/10.1109/tie.2014.2363817
Abstract
This paper presents an energy sharing state-of-charge (SOC) balancing control scheme based on a distributed battery energy storage system architecture where the cell balancing system and the dc bus voltage regulation system are combined into a single system. The battery cells are decoupled from one another by connecting each cell with a small lower power dc-dc power converter. The small power converters are utilized to achieve both SOC balancing between the battery cells and dc bus voltage regulation at the same time. The battery cells' SOC imbalance issue is addressed from the root by using the energy sharing concept to automatically adjust the discharge/charge rate of each cell while maintaining a regulated dc bus voltage. Consequently, there is no need to transfer the excess energy between the cells for SOC balancing. The theoretical basis and experimental prototype results are provided to illustrate and validate the proposed energy sharing controller.Keywords
Funding Information
- Alabama National Aeronautics Space Administration Experimental Program to Stimulate Competitive Research (EPSCoR) Research Infrastructure Development (NNX13AB09A)
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