应用于储能系统的隔离型双向全桥直流变换器的软开关特性研究  

On Soft Switching Characteristics of Dual Active Bridge Converters Applied in Energy Storage Systems

作　　者：黄珺[1] 王跃[1] 高远[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《电气传动》2013年第S1期74-78,共5页Electric Drive

摘　　要：在储能系统中,隔离型双向全桥直流变换器(DAB)因为其优异的特性而得到广泛的应用。首先分析了DAB在传统移相控制下的工作原理和软开关特性。针对DAB在轻载时将失去软开关的情况,引入了单边全桥脉冲宽度调制(Single H-Bridge PWM)的控制方法。重点分析了DAB在单边全桥脉冲宽度调制下的软开关特性以及调制占空比的选取原则。最后,在Saber仿真软件里搭建了DAB的电路模型,并且通过仿真得到在单边全桥脉冲宽度调制下,DAB的效率显著提高。Dual active bridge(DAB) converters with outstanding performances are widely applied in energy storage systems. Firstly,operation principles and soft switching characteristics of DAB under conventional phase-shift control are addressed. Because DAB will loss the capability of soft switching at light loads,the single H-bridge PWM control scheme is applied. Soft switching characteristics as well as criteria for the duty cycle calculation are mainly analyzed. A DAB converter is modeled in Saber,and simulation results show that the efficiency is improved significantly under the single H-bridge PWM control.

关 键 词：隔离型双向全桥直流变换器 软开关 零电压开通 移相控制 单边全桥脉冲宽度调制控制 

分 类 号：TM46[电气工程—电器]