基于双有源桥实际模型的软开关特性分析  

Characteristics Analysis of Soft Switch Based on Practical Model of Dual Active Bridge

作　　者：卓福生 董纪清[1] ZHUO Fu-sheng;DONG Ji-qing(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108

出　　处：《电气开关》2024年第2期59-64,共6页Electric Switchgear

基　　金：福建省工业引导性项目(2022H0011)。

摘　　要：随着储能技术的日新月异,作为储能系统与新能源系统的连接桥梁,双向DC-DC变换器近年来成为新能源技术的重点研究对象。针对双有源桥双向DC-DC变换器在实际应用中存在的软开关问题,对双有源桥双向DC-DC变换器实际模型进行分析,提出一种移相变频控制控制策略,该策略以开关频率为切入点,分析了开关频率对变换器软开关特性的影响,通过对开关频率的调节满足了变换器的软开关条件。最后设计一台输入280V,输出100V的1kW实验样机验证所提策略的正确性。With the rapid development of energy storage technology,as a bridge between energy storage system and new energy system,bidirectional DC-DC converter has become a key research object of new energy technology in recent years.In view of the soft switching problem existing in the practical application of dual active bridge bidirectional DC-DC converter,this paper analyzes the actual model of dual active bridge bidirectional DC-DC converter,and proposes a phase shifting control strategy.The strategy takes switching frequency as the entry point,and analyzes the influence of switching frequency on the soft switching characteristics of the converter.The soft switching condition of the converter is satisfied by adjusting the switching frequency.Finally,a 1kW prototype with 280V input and 100V output is designed to verify the correctness of the proposed strategy.

关 键 词：双向DC-DC变换器 DAB变换器 零电压开通 移相变频 

分 类 号：TN624[电子电信—电路与系统]