基于小波包变换-主元分析-神经网络算法的多电平逆变器故障诊断
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摘要
针对级联多电平逆变器的故障诊断问题,提出了一种基于小波包变换-主元分析-神经网络算法的故障诊断方法。首先,通过小波包变换对故障信号进行多尺度小波包分解,并重构提取小波包能量作为故障特征向量;然后,采用主元分析方法提取主元信息以降低故障特征的维数;最后,利用BP神经网络进行故障分类和识别。通过仿真实验,验证了该方法相对于传统方法具有更高的故障诊断和故障识别的准确率,并且对噪声具有较好的鲁棒性。
To handle the fault diagnosis of cascaded multi-level inverters,a fault diagnosis based on WPT-PCA-NN algorithm was proposed in this paper.Firstly,the wavelet packet transform(WPT)was applied to the multi-scale wavelet packet decomposition of fault signals,and the fault feature vector was extracted from the reconstructed wavelet packet energy.Then,the principal component analysis(PCA)was employed to extract the principal information to reduce the dimensions of fault features.Finally,the BP neural network(NN)was used for fault diagnosis and identification.The simulation results demonstrate that the proposed method is more accurate in fault diagnosis and identification in comparison with traditional methods,and is more robust to noisy fault signals.
To handle the fault diagnosis of cascaded multi-level inverters,a fault diagnosis based on WPT-PCA-NN algorithm was proposed in this paper.Firstly,the wavelet packet transform(WPT)was applied to the multi-scale wavelet packet decomposition of fault signals,and the fault feature vector was extracted from the reconstructed wavelet packet energy.Then,the principal component analysis(PCA)was employed to extract the principal information to reduce the dimensions of fault features.Finally,the BP neural network(NN)was used for fault diagnosis and identification.The simulation results demonstrate that the proposed method is more accurate in fault diagnosis and identification in comparison with traditional methods,and is more robust to noisy fault signals.
引文
[1]MOHSEN A,HAMID M,REZA A.A fault-tolerant strategy based on fundamental phase-shift compensation for threephase multilevel converters with quasi-Z-source networks with discontinuous input current[J].IEEE Transactions on Power Electronics,2016,31(11):7480-7488.
[2]KIM S M,LEE J S,LEE K B.A modified level-shifted PWM strategy for fault-tolerant cascaded multilevel inverters with improved power distribution[J].IEEE Transactions on Industrial Electronics,2016,63(11):7264-7274.
[3]OUNI S,ZOLGHADRI M R,KHODABANDEH M,et al.Improvement of post-fault performance of a cascaded H-bridge multilevel inverter[J].IEEE Transactions on Industrial Electronics,2017,64(4):2779-2788.
[4]MOHSEN A,HAMID M,REZA A.Multi fault tolerance strategy for three-phase multilevel converters based on a half-wave symmetrical selective harmonic elimination technique[J].IEEE Transactions on Power Electronics,2017,32(10):7980-7989.
[5]CHEN W,BAZZI A M.Logic-based methods for intelligent fault diagnosis and recovery in power electronics[J].IEEE Transactions on Power Electronics,2017,32(7):5573-5589.
[6]袁国森,张彼德,李明昆,等.基于极值比值法和神经网络的逆变器故障诊断[J].电测与仪表,2016,53(14):34-39.YUAN Guosen,ZHANG Bide,LI Mingkun,et al.Fault diagnosis for inverter based on extremum value ratio and probabilistic neural network[J].Electrical Measurement&Instrumentation,2016,53(14):34-39.
[7]崔江,王强,龚春英.结合小波与Concordia变换的逆变器功率管故障诊断技术研究[J].中国电机工程学报,2015,35(12):3110-3116.CUI Jiang,WANG Qiang,GONG Chunying.Inverter power switch fault diagnosis technique research based on wavelet and concordia transform[J].Proceedings of the Chinese Society for Electrical Engineering,2015,35(12):3110-3116.
[8]陈高华,成庶,向超群.非侵入式逆变器功率管开路故障诊断方法[J].中国电机工程学报,2017,37(13):3854-3862.CHEN Gaohua,CHENG Shu,XIANG Chaoqun.A non-intrusive diagnostic technique for open-circuited faults of inverters[J].Proceedings of the Chinese Society for Electrical Engineering,2017,37(13):3854-3862.
[9]CAI B,ZHAO Y,LIU H,et al.A data-driven fault diagnosis methodology in three-phase inverters for PMSM drive systems[J].IEEE Transactions on Power Electronics,2017,32(7):5590-5600.
[10]沈艳霞,吴娟,赵芝璞,等.三电平逆变器多故障模式识别方法[J].系统仿真学报,2017,29(7):1447-1456.SHEN Yanxia,WU Juan,ZHAO Zhipu,et al.Multiple faults identification of three-level inverter[J].Journal of System Simulation,2017,29(7):1447-1456.
[11]WANG J,HE Q B.Wavelet packet envelope manifold for fault diagnosis of rolling element bearings[J].IEEE Transactions on Instrumentation&Measurement,2016,65(11):2515-2526.
[12]SAEED O,MOHAMMAD R Z,JOSE R,et al.Quick diagnosis of short circuit faults in cascaded H-bridge multilevel inverters using FPGA[J].Journal of Power Electronics,2017,17(1):56-66.
[13]WU F,YANG Z,LIU Y.Current similarity based open-circuit fault diagnosis for induction motor drives with discrete wavelet transform[J].Microelectronics Reliability,2017,75:309-316.
[14]张德峰.MATLAB小波分析[M].北京:机械工业出版社,2009.
[15]杜海莲,苗诗瑜,杜文霞,等.改进PCA方法在化工过程中的故障诊断研究[J].山东科技大学学报(自然科学版),2017,36(5):16-22.DU Hailian,MIAO Shiyu,DU Wenxia,et al.Research on fault diagnosis of chemical process based on improved PCA method[J].Journal of Shandong University of Science and Technology(Natural Science),2017,36(5):16-22.
[16]公茂法,柳岩妮,王来河,等.基于改进蝙蝠算法优化BP神经网络的电力变压器故障诊断研究[J].山东科技大学学报(自然科学版),2017,36(3):70-74.GONG Maofa,LIU Yanni,WANG Laihe,et al.Fault diagnosis of power transformer based on improved BP neural network optimized by bat algorithm[J].Journal of Shandong University of Science and Technology(Natural Science),2017,36(3):70-74.
[17]MUHAMMAD T,FURQAN A,SUNG H K.A matlab and simulink based three-phase inverter fault diagnosis method using three-dimensional features[J].International Journal of Fuzzy Logic and Intelligent Systems,2016,16(3):173-180.
[18]HU K T,LIU Z G,LIN S S.Wavelet entropy-based traction inverter open switch fault diagnosis in high-speed railways[J].Entropy,2016,18(3):1-19.
[19]HE S M,WANG D H.A new method of parameters determined in PCNN[J].Applied Mechanics and Materials,2014,548-549:1059-1063.
[2]KIM S M,LEE J S,LEE K B.A modified level-shifted PWM strategy for fault-tolerant cascaded multilevel inverters with improved power distribution[J].IEEE Transactions on Industrial Electronics,2016,63(11):7264-7274.
[3]OUNI S,ZOLGHADRI M R,KHODABANDEH M,et al.Improvement of post-fault performance of a cascaded H-bridge multilevel inverter[J].IEEE Transactions on Industrial Electronics,2017,64(4):2779-2788.
[4]MOHSEN A,HAMID M,REZA A.Multi fault tolerance strategy for three-phase multilevel converters based on a half-wave symmetrical selective harmonic elimination technique[J].IEEE Transactions on Power Electronics,2017,32(10):7980-7989.
[5]CHEN W,BAZZI A M.Logic-based methods for intelligent fault diagnosis and recovery in power electronics[J].IEEE Transactions on Power Electronics,2017,32(7):5573-5589.
[6]袁国森,张彼德,李明昆,等.基于极值比值法和神经网络的逆变器故障诊断[J].电测与仪表,2016,53(14):34-39.YUAN Guosen,ZHANG Bide,LI Mingkun,et al.Fault diagnosis for inverter based on extremum value ratio and probabilistic neural network[J].Electrical Measurement&Instrumentation,2016,53(14):34-39.
[7]崔江,王强,龚春英.结合小波与Concordia变换的逆变器功率管故障诊断技术研究[J].中国电机工程学报,2015,35(12):3110-3116.CUI Jiang,WANG Qiang,GONG Chunying.Inverter power switch fault diagnosis technique research based on wavelet and concordia transform[J].Proceedings of the Chinese Society for Electrical Engineering,2015,35(12):3110-3116.
[8]陈高华,成庶,向超群.非侵入式逆变器功率管开路故障诊断方法[J].中国电机工程学报,2017,37(13):3854-3862.CHEN Gaohua,CHENG Shu,XIANG Chaoqun.A non-intrusive diagnostic technique for open-circuited faults of inverters[J].Proceedings of the Chinese Society for Electrical Engineering,2017,37(13):3854-3862.
[9]CAI B,ZHAO Y,LIU H,et al.A data-driven fault diagnosis methodology in three-phase inverters for PMSM drive systems[J].IEEE Transactions on Power Electronics,2017,32(7):5590-5600.
[10]沈艳霞,吴娟,赵芝璞,等.三电平逆变器多故障模式识别方法[J].系统仿真学报,2017,29(7):1447-1456.SHEN Yanxia,WU Juan,ZHAO Zhipu,et al.Multiple faults identification of three-level inverter[J].Journal of System Simulation,2017,29(7):1447-1456.
[11]WANG J,HE Q B.Wavelet packet envelope manifold for fault diagnosis of rolling element bearings[J].IEEE Transactions on Instrumentation&Measurement,2016,65(11):2515-2526.
[12]SAEED O,MOHAMMAD R Z,JOSE R,et al.Quick diagnosis of short circuit faults in cascaded H-bridge multilevel inverters using FPGA[J].Journal of Power Electronics,2017,17(1):56-66.
[13]WU F,YANG Z,LIU Y.Current similarity based open-circuit fault diagnosis for induction motor drives with discrete wavelet transform[J].Microelectronics Reliability,2017,75:309-316.
[14]张德峰.MATLAB小波分析[M].北京:机械工业出版社,2009.
[15]杜海莲,苗诗瑜,杜文霞,等.改进PCA方法在化工过程中的故障诊断研究[J].山东科技大学学报(自然科学版),2017,36(5):16-22.DU Hailian,MIAO Shiyu,DU Wenxia,et al.Research on fault diagnosis of chemical process based on improved PCA method[J].Journal of Shandong University of Science and Technology(Natural Science),2017,36(5):16-22.
[16]公茂法,柳岩妮,王来河,等.基于改进蝙蝠算法优化BP神经网络的电力变压器故障诊断研究[J].山东科技大学学报(自然科学版),2017,36(3):70-74.GONG Maofa,LIU Yanni,WANG Laihe,et al.Fault diagnosis of power transformer based on improved BP neural network optimized by bat algorithm[J].Journal of Shandong University of Science and Technology(Natural Science),2017,36(3):70-74.
[17]MUHAMMAD T,FURQAN A,SUNG H K.A matlab and simulink based three-phase inverter fault diagnosis method using three-dimensional features[J].International Journal of Fuzzy Logic and Intelligent Systems,2016,16(3):173-180.
[18]HU K T,LIU Z G,LIN S S.Wavelet entropy-based traction inverter open switch fault diagnosis in high-speed railways[J].Entropy,2016,18(3):1-19.
[19]HE S M,WANG D H.A new method of parameters determined in PCNN[J].Applied Mechanics and Materials,2014,548-549:1059-1063.