基于电感电流的双有源桥DC/DC变换器的开路故障诊断  

An Open-Circuit Fault Diagnosis Method for Dual Active Bridge DC/DC Converters Based on Inductor Current

作　　者：张龙港 康劲松 郭其一[1] ZHANG Longgang;KANG Jinsong;GUO Qiyi(School of Electronics and Information Engineering of Tongji University,Shanghai 201804,China;Institute of Railway&Urban Rail Transit of Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学电子与信息工程学院,上海201804 [2]同济大学铁道与城市轨道交通研究院,上海201804

出　　处：《铁道车辆》2021年第6期25-30,44,共7页Rolling Stock

摘　　要：基于电力电子变压器的列车牵引传动系统中,双有源桥DC/DC变换器的组成结构复杂且运行环境较为恶劣,极易发生故障。文章针对DAB中IGBT模块不同的开路故障情况,通过建立DAB动态数学模型,对实测的电流值与估计值的状态残差进行了分析,研究了基于电感电流的双有源桥DC/DC变换器开路故障诊断及定位方法,并基于MATLAB/Simulink搭建了仿真模型进行验证。仿真结果表明,该方法诊断快速,结果精确,可快速确定故障位置。In the train traction drive system based on power electronic transformer,the composition of double active bridge DC/DC converter is complex and the operation environment is relatively poor,which is prone to failure.Aiming at the different open-circuit faults of IGBT modules in DAB,the dynamic mathematical model of DAB is established,and the state residual between the measured current value and the estimated value is analyzed.The open-circuit fault diagnosis and location method of dual active bridge DC/DC converter based on inductor current is studied,and the simulation model is built based on MATLAB/Simulink to verify.The simulation results show that the method is fast,accurate and can quickly locate the fault location.

关 键 词：双有源桥DC/DC变换器 动态数学模型 状态估计器 电感电流 状态残差 故障诊断 

分 类 号：U270.381[机械工程—车辆工程]