多电平级联H桥逆变器3N+1冗余容错策略的研究  

Research on 3N+1 Redundancy Fault-tolerance Strategy of Multilevel Cascaded H-bridge Inverter

作　　者：汪玉凤[1] 张影[1] 李爽 高珊 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105 [2]国网辽宁省电力有限公司喀左县供电公司,辽宁朝阳122300

出　　处：《高压电器》2018年第2期208-212,共5页High Voltage Apparatus

基　　金：国家自然科学基金(51307076)~~

摘　　要：为减小IGBT故障对多电平级联H桥(CHB)逆变器运行稳定性的影响,提高级联APF系统的故障容错能力,提出多电平CHB逆变器开路故障检测与3N+1冗余容错策略。该方案在单相故障情况下不改变系统控制策略,降低控制的复杂度,保障逆变器的输出并且保持线电压和负载的对称。该容错拓扑成本低、操作便利,可提高多电平逆变器的可靠性。仿真和实验结果证明该容错方案的合理性和切换的快速性。In order to reduce the influence of IGBT failure of multilevel cascaded H-bridge（CHB）inverter operationstability and improve the APF system fault-tolerance ability,the multilevel CHB inverter open circuit fault detectionand 3 N＋1 redundancy fault-tolerance strategy are put forward. The scheme does not change the system control strate-gy in the case of a single phase fault,reduces the complexity of the control,guarantees the output of the inverter andmaintains the symmetry of the line voltage and load. The fault-tolerance topology has low cost and convenient opera-tion,which can improve the reliability of the multilevel inverter.

关 键 词：级联H桥逆变器 开路故障诊断 3N+1冗余 可靠性 

分 类 号：TM464[电气工程—电器]