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山东大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (5): 229-237.doi: 10.6040/j.issn.1672-3961.0.2017.170

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一种多电平逆变器故障诊断与容错控制策略

刘卓,王天真*,汤天浩,冯页帆,姚君琦,高迪驹   

  1. 上海海事大学电气自动化系, 上海 201306
  • 收稿日期:2017-02-10 出版日期:2017-10-20 发布日期:2017-02-10
  • 通讯作者: 王天真(1978— ),女,山东青岛人,教授,博士后,主要研究方向为电力电子装置的故障诊断与容错控制,智能算法融合等. ;E-mail: wtz0@sina.com E-mail:liuzhuo917@163.com
  • 作者简介:刘卓(1992— ),男,湖北十堰人,硕士研究生,主要研究方向为电力电子装置的故障诊断与容错控制等.E-mail: liuzhuo917@163.com
  • 基金资助:
    国家自然科学基金资助项目(61673260);上海市自然科学基金资助项目(16ZR1414300)

A fault diagnosis and fault-tolerant control strategy for multilevel inverter

LIU Zhuo, WANG Tianzhen*, TANG Tianhao, FENG Yefan, YAO Junqi, GAO Diju   

  1. Department of Electrical Automation, Shanghai Maritime University, Shanghai 201306, China
  • Received:2017-02-10 Online:2017-10-20 Published:2017-02-10

摘要: 针对逆变器开关元件的开路故障,提出一种级联H桥多电平逆变器故障诊断与容错控制策略。 在不改变级联H桥多电平逆变器电路拓扑的情况下,通过快速傅里叶变换(fast fourier transform, FFT)和主元分析(principal component analysis, PCA)对逆变器原始开路故障数据进行了预处理和特征提取,构建贝叶斯网络(Bayesian network, BN)对级联H桥多电平逆变器开关元件的故障进行快速诊断,根据诊断的结果,基于变载波和调制波电压重构容错控制方法,使逆变器输出电压仍能满足系统平稳运行的要求,通过仿真与试验验证了该策略具有良好的诊断及容错控制性能。

关键词: 电压重构容错控制, 级联多电平逆变器, 故障诊断

Abstract: To solve the open circuit faults of the switching device in multilevel inverters, a fault diagnosis and fault-tolerant control strategy was proposed for a cascaded H-bridge multilevel inverter. The fast fourier transform(FFT)and the principal component analysis(PCA)were utilized to reprocess and feature extraction respectively without changing the circuit topology of the cascaded H-bridge multilevel inverter. The faults of cascaded H-bridge multilevel inverters could be fast diagnosed with constructing Bayesian network(BN). According to the fault diagnosis results, output voltages of the multilevel inverter could still meet the demands to keep the system operating smoothly. The way was based on a voltage reconstruction fault tolerant control method by changing the modulation waves and carrier waves, and the performance of the strategy was verified by simulation and experiment.

Key words: multilevel inverters, voltage reconstruction fault tolerant control, fault diagnosis

中图分类号: 

  • TP273
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