双有源桥变换器拓扑结构与控制策略研究综述

Overview of Topologies and Control Strategies for Dual-active-bridge Converters

针对功率双向传输系统中的核心—双有源桥DAB(dual-active-bridge)变换器,首先对其基本原理与拓扑结构进行概述;然后,介绍了DAB变换器单移相、双重移相、拓展移相与三重移相这4种基本调制策略;进一步地,对基于这4种调制策略的控制优化建模、优化实现进行了对比分析;最后,对DAB变换器在实际应用中所面临的问题与解决方案进行了探讨。随着直流配电、储能、分布式能源技术的进一步发展,DAB变换器将迎来广阔的应用前景。

The dual-active-bridge( DAB) converter is a key device in a bidirectional power transmission system.In this paper,its fundamental operation principle and topologies are reviewed at first.Then,four basic modulation strategies for the DAB converter are introduced,including single-phase-shifted,dual-phase-shifted,extended-phaseshifted and triple-phase-shifted strategies.Moreover,the modeling and optimization methods based on these four modulation strategies are compared and analyzed.Finally,some problems faced by practical applications and the corresponding solutions are discussed.Along with the development of DC power distribution,energy storage and distributed energy resources,DAB converters will have broad application prospects.