电工技术学报  2018, Vol. 33 Issue (16): 3822-3834    DOI: 10.19595/j.cnki.1000-6753.tces.180484
模块化多电平换流技术及其应用专题 |
基于残差变化率的单相级联H桥整流器IGBT开路故障诊断
谢东1,2, 葛兴来2
1. 磁浮技术与磁浮列车教育部重点实验室(西南交通大学) 成都 611756;
2. 西南交通大学电气工程学院 成都 611756
Residual-Changing-Rate Based Open-Circuit Fault Diagnosis for A Single-Phase Cascaded H-Bridge Rectifier
Xie Dong1,2, Ge Xinglai2
1. Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle Ministry of Education Southwest Jiaotong University Chengdu 611756 China;
2. School of Electrical Engineering Southwest Jiaotong University Chengdu 611756 China
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摘要 为实现单相级联H桥整流器(SPCHBR)的IGBT开路故障实时诊断,提出一种基于残差变化率的IGBT开路故障诊断方法。首先建立SPCHBR的混合逻辑动态模型(MLD),生成网侧电流残差。然后从理论和仿真分析IGBT故障时的残差特征,结合电流残差变化率,定义不同开关信号隔离下的归一化诊断变量。通过设定阈值可以实现不同模块单个或双IGBT开路故障的检测和定位。所提方法不需要额外的传感器,诊断信号来自于控制系统,且诊断速度较快,在其他参数不变的前提下不受网压、负载和运行工况变化的影响。最后,通过硬件在环(HIL)测试系统验证了该诊断方法的有效性和可行性。
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关键词 单相级联H桥整流器IGBT开路故障混合逻辑动态模型电流残差变化率    
Abstract:To realize the real-time diagnosis for IGBT open-circuit faults in a single-phase cascaded H-bridge rectifier (SPCHBR), a residual-changing-rate based fault diagnosis method is proposed. Firstly, a mixed logic dynamic (MLD) model of the SPCHBR was established to generate the residual of the grid current. Then, combining the theoretical calculation with the simulation results, the residual characteristics for different IGBT faults were analyzed. According to the change rate of current residual, the normalized diagnostic variables were defined for different IGBT faults under the isolation of specific driving signals. Finally, the detection threshold was chosen to accomplish fault location for the single or multiple IGBT open-circuit faults in different modules. The proposed method does not require additional sensor, and the diagnostic signals all come from the control system. Furthermore, the diagnostic method has fast diagnosis speed, and it is robust against false alarms for the transient changes of grid voltage, load and operation mode without changing other parameters. Test results in the hardware-in-the-loop (HIL) system have illustrated the validity and feasibility of the proposed method.
Key wordsSingle-phase cascaded H-bridge rectifier (SPCHBR)    IGBT open-circuit faults    mixed logical dynamic (MLD) model    the change rate of current residual   
收稿日期: 2018-04-02      出版日期: 2018-09-03
PACS: TM46  
基金资助:国家自然科学基金资助项目(51677156、61733015)
通讯作者: 葛兴来 男,1979年生,教授,博士生导师,研究方向为电力牵引传动系统故障建模、诊断及稳定性分析。E-mail: xlgee@163.com   
作者简介: 谢 东 男,1995年生,硕士研究生,研究方向为电力电子牵引变压器故障诊断与容错控制。E-mail: oduoxie@163.com
引用本文:   
谢东, 葛兴来. 基于残差变化率的单相级联H桥整流器IGBT开路故障诊断[J]. 电工技术学报, 2018, 33(16): 3822-3834. Xie Dong, Ge Xinglai. Residual-Changing-Rate Based Open-Circuit Fault Diagnosis for A Single-Phase Cascaded H-Bridge Rectifier. Transactions of China Electrotechnical Society, 2018, 33(16): 3822-3834.
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