Three-Level NPC Inverter Fault Diagnosis using Wavelet Packet Transform and Statistical Analysis of the Emitted Near-Field

Ibtissem Abari, M. Hamouda, J. Ben Hadj Slama
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引用次数: 1

Abstract

This research paper deals with the open-circuit fault diagnosis in three-phase three-level Neutral Point Clamped (NPC) inverter. The proposed non-intrusive method identifies the faulty MOSFET based on the emitted near-field above the power conversion system. To detect the faulty switch, the wavelet packet transform is applied to extract a distinguishable electromagnetic signature. For the fault isolation, we focus on the two statistical moments, which are the mean value and the kurtosis of the radiated emissions. The proposed approach is verified through experimental results.
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基于小波包变换和发射近场统计分析的三级NPC逆变器故障诊断
研究了三相三电平中性点箝位(NPC)逆变器的开路故障诊断。提出了一种基于功率转换系统上方发射的近场信号识别故障MOSFET的非侵入式方法。为了检测故障开关,采用小波包变换提取可识别的电磁信号。对于故障隔离,我们主要关注两个统计矩,即辐射发射的平均值和峰度。实验结果验证了该方法的有效性。
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