整流器主电路开路故障诊断及容错控制研究  

Research on Open-Circuit Fault Diagnosis and Fault-Tolerant Control Scheme for Rectifier Main Circuits

作　　者：成庶[1] 李蔚[2,1] 陈特放[1] 丁荣军[3] 张桂新[1] 

机构地区：[1]中南大学交通运输工程学院,长沙410075 [2]中南大学信息科学与工程学院,长沙410075 [3]南车株洲电力机车研究所有限公司,株洲412001

出　　处：《电工技术学报》2016年第13期26-35,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(61273158)

摘　　要：针对牵引变流器故障中较常见的开关管开路故障,提出一种故障诊断和容错控制新方法,可在不增加传感器的基础上,准确、迅速地诊断/定位任意开关管开路故障,并在此基础上,实施所提出的新型容错控制方案,使得变流器在任一开关管开路情况下,仍能保持全功率运行。其中,诊断/定位方法无需增加任何传感器,利用变流器控制所必须采集的输入和输出电压信号作为参考量,诊断过程与控制触发信号及负载变化无关;容错控制方案需增加5组外部开关,改变变流器与变压器绕组的连接方式,在不改动原有设备的基础上,保障容错控制目标,新加入的开关工作在零电压零电流条件下。通过试验样机和测试结果验证了理论分析的有效性。A novel open circuit fault diagnosis method and the corresponding fault tolerant scheme areproposed in this paper to prevent traction converters breakdown from one leg open circuit fault. When an opencircuit occurs in any leg of the traction converter, the newly proposed method can generate an indicationaccurately to the faulty leg rapidly without additional sensor. Furthermore, the faulty converter can bereconfigured to maintain its full rate operation. The fault diagnosis and locate process only utilize the converter ’ sinput/output voltages, which are the most common parameters in the converter control. No extra sensors areneeded. The diagnosis process and the control triggering signal are not related to the load variation. The faulttolerant process employs 5 additional switches to reconfigure the connection between the traction converter and thetraction transformer without changing the original devices. All the 5 switches are working under the zero voltageand zero current conditio, Station and experta , proceeded to verify the effectiveness of the theoreticalanalysis.

关 键 词：变流器 故障诊断 故障定位 容错控制 

分 类 号：TM46[电气工程—电器]