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首页> 外文期刊>Power Electronics, IET >Reliable transformerless battery energy storage systems based on cascade dual-boost/buck converters
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Reliable transformerless battery energy storage systems based on cascade dual-boost/buck converters

机译：基于级联双升压/降压转换器的可靠的无变压器电池储能系统

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摘要

In this study, the cascade dual-boost/buck half-bridge and full-bridge bidirectional ac–dc converters are proposed for grid-tie transformerless battery energy storage systems (BESSs). The proposed converter contains the advantages of the traditional cascade H-bridge (CHB) converter. However, compared with CHB converter, there is no shoot-through issue in the proposed converter, which is more reliable for BESS. In addition, a unified control scheme is proposed for active-power control and individual state-of-charge-balancing control of BESS, which is very modular and easy to implement. At the end, a laboratory BESS is constructed and tested combining a cascade two-unit dual-boost/buck half-bridge converter with nine lead–acid series-connected battery units. Experimental results obtained from the laboratory system verified the feasibility and effectiveness of the proposed BESS and unified control scheme.
机译：在这项研究中，提出了级联双升压/降压半桥和全桥双向AC-DC转换器，用于无扎带式无变压器电池储能系统（BESS）。提出的转换器具有传统级联H桥（CHB）转换器的优点。但是，与CHB转换器相比，该转换器没有直通问题，对于BESS而言更可靠。此外，针对BESS的有功功率控制和单个充电状态平衡控制，提出了一种统一的控制方案，该方案非常模块化，易于实现。最后，实验室级BESS的构建和测试将级联的两单元双升压/降压半桥转换器与九个铅酸串联电池单元组合在一起。从实验室系统获得的实验结果证明了所提出的BESS和统一控制方案的可行性和有效性。

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