A 150-kW 99% Efficient All-Silicon-Carbide Triple-Active-Bridge Converter for Solar-Plus-Storage Systems
A 150-kW 99% Efficient All-Silicon-Carbide Triple-Active-Bridge Converter for Solar-Plus-Storage Systems
复制标题
A%20150-kW%2099%%20高效%20全碳化硅%20三重有源桥%20转换器%20用于%20太阳能+存储%20系统
DOI：
10.1109/jestpe.2020.3044572
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发表时间：
2020
影响因子：
5.5
通讯作者：
J. Balda
中科院分区：
文献类型：
--
作者：
Yuheng Wu;M. Mahmud;Shamar F. Christian;R. Fantino;R. Gomez;Yue Zhao;J. Balda
太阳能加储能系统可以有效地缓解光伏发电的不确定性，通过增加一个集成的电池储能系统来提高系统的可靠性。作为一种具有软开关能力的三端口双向隔离式DC-DC转换器，三有源桥(TAB)转换器本质上符合太阳能加蓄电池系统的要求。然而，TAB转换器的设计仍然存在挑战，以进一步提高系统效率。本文给出了一种碳化硅150kW TAB变流器的详细设计、实现和演示。从简要回顾TAB变流器入手，分析了TAB变流器的调制方式、功率特性和软开关区域。然后，给出了H桥变流器模块的详细设计。为了提高系统效率，对具有不同外部栅极电阻的SIC栅极驱动器进行了全面的表征，以解决瞬变期间的开关损耗和电压过冲之间的权衡，以及H桥构建块的热性能。此外，还给出了20 kHz三端口变压器的设计和特性。在一台全功率样机上进行了全面的实验研究，以验证所提出的设计。所提出的TAB转换器的峰值效率为99.1%，可以满足太阳能加蓄电池应用的要求。
Solar-plus-storage systems could effectively mitigate the uncertainties of the photovoltaic (PV) generation and improve system reliability by adding an integrated battery energy storage system. As a three-port bidirectional isolated dc–dc converter with soft-switching capability, the triple-active-bridge (TAB) converter inherently matches the requirements of the solar-plus-storage system. However, challenges still remain in the TAB converter design to further improve system efficiency. In this article, the detailed design, implementation, and demonstration for a silicon carbide (SiC) 150-kW TAB converter are presented. Starting from a brief review of the TAB converter, the modulation scheme, power characteristics, and soft-switching region are analyzed. Then, the detailed design of the H-bridge converter building block is given. To improve the system efficiency, a comprehensive characterization of the SiC gate driver with various external gate resistances is performed to address tradeoffs between switching loss and voltage overshoot during transients, as well as the thermal performance of the H-bridge building block. In addition, the design and characterization of the 20-kHz three-port transformer are also given. Comprehensive experimental studies are conducted on a full-power prototype to verify the proposed design. With a measured 99.1% peak efficiency, the proposed TAB converter can fulfill the requirements for solar-plus-storage applications.