基于多神经网络的三电平逆变器器件开路故障诊断方法

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Abstract In order to diagnose different fault patterns of single device open circuit and several devices open circuit at the same time,a fault diagnosis method for a kind of three level inverters was discussed in this paper. Due to the reason of some fault patterns can not be isolated easily,the upper,middle and down bridge voltages were used as test signals. Then the fault features including harmonic amplitude and phase were extracted from these signals use the method of spectrum analysis. At last,a novel multi neural network was proposed to diagnose all these open circuit faults. The simulation and experiment result show that the method can isolate fault patterns exactly. This method has the advantages of high classification performance and high reliability.

Key words： Three level fault diagnosis spectrum analysis multi neural network bridge voltage

Received: 29 November 2011 Published: 11 December 2013

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TM464

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	Chen Danjiang
	Ye Yinzhong

Cite this article:

Chen Danjiang,Ye Yinzhong. Fault Diagnosis of Three Level Inverter Based on Multi Neural Network[J]. Transactions of China Electrotechnical Society, 2013, 28(7): 120-126.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I7/120

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