开关缓冲电容与死区效应对双有源桥式变换器传输功率影响  

Impact of Snubber Capacitance and Dead-time Effects on Dual Active Bridge Converters Power Transmission

作　　者：刘海洋 崔淑梅[1] 孙赫阳 LIU Haiyang;CUI Shumei;SUN Heyang(School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China;School of Electrical Engineering,Northeast Electric Power University,Jilin 132011,China)

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,哈尔滨150001 [2]东北电力大学电气工程学院,吉林132011

出　　处：《高电压技术》2023年第2期727-737,共11页High Voltage Engineering

摘　　要：为了精确地反映死区时间对双有源桥式变换器(dual active bridge,DAB)移相角偏移与传输功率的影响,将缓冲电容的作用引入到DAB死区效应的分析中。通过设定最优死区时间将电感电流过零点排除在死区时段之外,降低了不同电压模式下死区过程分析的难度,并得到一个更精确的DAB移相角与传输功率的模型。结果表明:应用该模型能够准确地计算出DAB任意工况下的静态工作点,从而提高DAB小信号建模的精度。In order to precisely describe the influences of the dead time on the dual active bridge(DAB)phase-shift deviation and power transmission,the snubber capacitance is introduced to the DAB dead-time effects.By setting the optimal dead time,the inductance current of the DAB converter ensures the zero-crossing point outside the dead time,thus the dead-time analysis is simplified in different voltage modes and the DAB power transmission is calculated more accurately with this dead-time model.The results show that this DAB dead-time model can deduce the steady-state solution accurately while the DAB small-signal modeling is promoted.

关 键 词：双有源桥式变换器 死区效应 开关缓冲电容 移相角偏移 传输功率 静态工作点 

分 类 号：TM46[电气工程—电器]