Fault diagnosis technology for three-level inverter based on ICEEMDAN-FE and SVM

CAO Ruijun; GUO Qiyi

doi:10.13890/j.issn.1000-128X.2023.01.013

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Fault diagnosis technology for three-level inverter based on ICEEMDAN-FE and SVM

Electric Traction and Control | 更新时间：2024-08-02

- Fault diagnosis technology for three-level inverter based on ICEEMDAN-FE and SVM
- Electric Drive for Locomotives Issue 1, Pages: 97-103(2023)
- 作者机构：
  
  同济大学电子与信息工程学院，上海 201804
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128X.2023.01.013
  CLC： TM464
- Published：10 January 2023，
  
  Received：29 November 2022，
  
  Revised：01 January 2023，
- 稿件说明：
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曹瑞钧, 郭其一. 基于ICEEMDAN-FE和支持向量机的三电平逆变器的故障诊断技术[J]. 机车电传动, 2023(1): 97-103.

CAO Ruijun, GUO Qiyi. Fault diagnosis technology for three-level inverter based on ICEEMDAN-FE and SVM[J]. Electric Drive for Locomotives, 2023(1): 97-103.
曹瑞钧, 郭其一. 基于ICEEMDAN-FE和支持向量机的三电平逆变器的故障诊断技术[J]. 机车电传动, 2023(1): 97-103. DOI： 10.13890/j.issn.1000-128X.2023.01.013.

CAO Ruijun, GUO Qiyi. Fault diagnosis technology for three-level inverter based on ICEEMDAN-FE and SVM[J]. Electric Drive for Locomotives, 2023(1): 97-103. DOI： 10.13890/j.issn.1000-128X.2023.01.013.

摘要

为了提高三电平逆变器复杂开路故障诊断的准确率，提出了一种应用“改进自适应噪声完备集合经验模态分解‒模糊熵（ICEEMDAN‒FE）”和“支持向量机（SVM）”结合的三电平逆变器故障诊断方法。首先，检测信号选取三相负载电压，为降低特征向量的维数，对三相负载电压进行Concordia变换，转换为α-β相电压；然后，通过ICEEMDAN算法提取α-β相电压的特征，得到不同尺度的内禀模态函数（IMF），再利用主成分分析（PCA）降维剔除IMF虚假分量；最后，计算优选的 IMF的模糊熵均值作为特征向量，输入到多分类SVM中进行训练分类，进而实现对二极管中点箝位型（NPC）三电平逆变器的故障诊断。仿真试验结果表明，该方法能够有效识别多种开路故障模式，具有抗噪性能强，诊断速度快，诊断精度高等优点。

Abstract

In order to improve the accuracy to diagnose complex open-circuit faults for three-level inverters

a new fault diagnosis method of three-level inverters was proposed

combining improved complete ensemble empirical mode decomposition with adaptive noise-fuzzy entropy (ICEEMDAN-FE) and support vector machine (SVM). First

the detection signal is supplied at three-phase load voltage

which was converted into α-β phase voltage by Concordia to reduce the dimension of the eigenvector. Second

the characteristics of the α-β phase voltage were extracted by the ICEEMDAN algorithm to generate the intrinsic modal functions (IMFs) at multiple scales. Then the principal component analysis (PCA) was conducted for dimensionality reduction to remove the false component of IMFs. Finally

the optimized mean FE of the IMFs was used as the eigenvector input into the multi-class SVM for training classification

to further enable fault diagnosis of the diode midpoint clamped (NPC) three-level inverters. The simulation results show that the proposed method can effectively identify a variety of open-circuit failure modes

and has the advantages of strong noise resistance

fast diagnosis and high diagnostic accuracy.

关键词

三电平逆变器ICEEMDAN-FE主成分分析支持向量机特征提取故障诊断仿真

Keywords

three-level inverterICEEMDAN-FEprincipal component analysissupport vector machine (SVM)characteristics extractionfault diagnosissimulation

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