Fault Diagnosis for Power Electronics Converters based on Deep Feedforward Network and Wavelet Compression

Lei Kou, Chuang Liu*, Guo wei Cai, Zhe Zhang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review


A fault diagnosis method for power electronics converters based on deep feedforward network and wavelet compression is proposed in this paper. The transient historical data after wavelet compression are used to realize the training of fault diagnosis classifier. Firstly, the correlation analysis of the voltage or current data running in various fault states is performed to remove the redundant features and the sampling point. Secondly, the wavelet transform is used to remove the redundant data of the features, and then the training sample data is greatly compressed. The deep feedforward network is trained by the low frequency component of the features, while the training speed is greatly accelerated. The average accuracy of fault diagnosis classifier can reach over 97%. Finally, the fault diagnosis classifier is tested, and final diagnosis result is determined by multiple-groups transient data, by which the reliability of diagnosis results is improved. The experimental result proves that the classifier has strong generalization ability and can accurately locate the open-circuit faults in IGBTs.

Original languageEnglish
Article number106370
JournalElectric Power Systems Research
Number of pages9
Publication statusPublished - Aug 2020


  • Deep Feedforward Network
  • Fault Diagnosis
  • Haar Transform
  • Power Electronics Converters
  • Transient Features
  • Wavelet Compression


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