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苗贝贝,沈艳霞.NPC三电平逆变器的开关管开路故障诊断[J].电源学报,2019,17(5):65-72
NPC三电平逆变器的开关管开路故障诊断
Diagnosis of Open-circuit Switch Faults in Neutral-point-clamped Three-level Inverter
投稿时间:2017-09-20  修订日期:2017-12-13
DOI:10.13234/j.issn.2095-2805.2019.5.65
中文关键词:  NPC三电平逆变器  开关状态  负载相电流  桥臂相电压  故障诊断
英文关键词:neutral-point-clamped(NPC) three-level inverter  switching state  load phase current  bridge arm phase voltage  fault diagnosis
基金项目:国家自然科学基金资助项目(61573167,61572237)
作者单位E-mail
苗贝贝 江南大学物联网技术应用教育部工程研究中心, 无锡 214122  
沈艳霞 江南大学物联网技术应用教育部工程研究中心, 无锡 214122 469698640@qq.com 
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中文摘要:
      开关管故障诊断是三电平逆变器系统实现可靠运行的前提。针对二极管中点箝位型NPC(neutral-poi-nt-clamped)三电平逆变器,提出了一种新颖的开关管开路故障诊断方法。选取开关状态、负载相电流的极性及桥臂相电压作为故障特征,在不同的电流流通路径下进行开路故障特征分析,实现对故障开关管地准确定位。实验验证了所提故障诊断方法的正确性和有效性,与其它开关管开路故障诊断方法相比,该方法不需要复杂的算法,具有诊断迅速、可靠性高的优点。
英文摘要:
      The fault diagnosis of switches is the premise for the realization of a three-level inverter system's reliable operation. Based on a diode neutral-point-clamped(NPC) three-level inverter, a novel diagnosis method for open-ci-rcuit switch faults is proposed. First, the switching states, polarity of load phase currents and bridge arm phase voltages are selected as fault characteristics. Then, the open-circuit fault characteristics are analyzed based on different current flow paths, thus realizing the accurate location of fault switches. The validity and effectiveness of the proposed fault diagnosis method were verified by experiments, compared with other open-circuit fault diagnosis methods, this method does not need complex algorithms, and it has advantages of faster diagnosis and higher reliability.
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