输出并联型双有源全桥变换器控制技术研究综述

输出并联型双有源全桥(dual-active-bridge,DAB)DC-DC变换器具备电气隔离、模块化扩展简单、高变比升降压及功率双向传输等优势,近年来得到国内外专家学者的广泛关注。首先,分析和归纳该类变换器功率平衡的典型控制方案,并从动态特性、模块化程度、传感器数量等方面,对不同控制方案下的研究策略进行多方面对比分析;然后,基于DAB变换器效率和动态性能优化方法,从多模块角度出发,分析组合系统功率平衡与DAB变换器性能优化相结合的一些典型混合控制策略,并从工程角度给出混合控制其他衍生思路及控制策略选取时,需考虑的实际因素;最后,从开关、桥臂、模块和拓扑等方向,对输出并联DAB变换器的容错控制方案进行详细概述并总结全文。

Review Research on Control Technology of Output Parallel Dual-active-bridge-converters

The output parallel dual active bridge(DAB) DC-DC converter has many advantages such as electrical isolation, high voltage regulation ratio, bidirectional energy transmission, and simple modular expansion;and thus has been widely concerned in recent years. Firstly, the typical control schemes of the power balance of parallel DAB converter were analyzed and summarized, the strategies under different schemes were combed in detail, and compared from the perspective of dynamic response, modularity, and the number of sensors. Furthermore, based on the efficiency and dynamic performance optimization methods of DAB, from the perspective of multi-module parallel connection, some typical hybrid optimization control strategies combining power balance control and DAB converter optimization were analyzed. Then, from the engineering point of view, other derivative ideas of the hybrid control strategy and the actual factors to be considered when selecting the control strategy were given. Finally, the fault-tolerant control scheme of output parallel DAB converter is summarized in detail from the switch, bridge arm, module, and topology.