基于dab的柔性电压配置和扩展功率的储能系统

E. Serban, Cosmin Pondiche, M. Ordonez
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引用次数: 1

摘要

双向电源变换器宽工作电压范围的产品开发和要求是一项技术挑战。为了克服当前最先进技术的局限性,所提出的基于dab的转换器拓扑结构采用并联-串联桥配置的开关组合。低压桥的开关节点分别接在两个变压器端子上。两个lv桥的直流端口通过一个开关接口互连,该接口允许它们以并联串联方式工作。带有开关接口的基于dab的转换器使电压利用范围增加了一倍,这使得电池的应用范围广泛(例如48v, 120 v)。基于dab的转换器内的MOSFET功率器件在其安全操作规范内使用,而所提出的架构允许灵活的电压配置用于不同类型的电池。此外,所提出的基于dab的变换器扩展了变换器的功率能力,有利于促进储能系统(ESS)的应用。实验结果是使用5kW标称功率的基于dab的变换器,采用碳化硅(SiC)和硅功率MOSFET器件进行的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
DAB-based Energy Storage System with Flexible Voltage Configuration and Extended Power Capability
Product developments and requirements for wide operational voltage range of bidirectional power converters represent a technical challenge. To overcome the limitations of the current state-of-the-art, the proposed DAB-based converter topology employs a switch combination for parallel-series bridges configuration. The switching nodes of the low-voltage (LV) bridges are separately connected at the two transformer terminals. The dc ports of the two LV-bridges are interconnected through a switch interface which allows them to operate in a parallel-series fashion. The DAB-based converter with the switch interface doubles the voltage utilization range, which enables a broad range of applications for batteries (e.g., 48-V, 120-V). The MOSFET power devices within the DAB-based converter are used within their safe operation specification, while the proposed architecture allows flexible voltage configuration for different types of batteries. Furthermore, the proposed DAB-based converter extends the power capability of the converter to advantageously facilitate applications for energy storage systems (ESS). The experimental results have been performed using a 5kW nominal power DAB-based converter with silicon carbide (SiC) and silicon power MOSFET devices.
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