整流器主电路开路故障诊断及容错控制研究

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Abstract A novel open circuit fault diagnosis method and the corresponding fault tolerant scheme are proposed in this paper to prevent traction converters breakdown from one leg open circuit fault.When an open circuit occurs in any leg of the traction converter,the newly proposed method can generate an indication accurately to the faulty leg rapidly without additional sensor.Furthermore,the faulty converter can be reconfigured to maintain its full rate operation.The fault diagnosis and locate process only utilize the converter’s input/output voltages,which are the most common parameters in the converter control.No extra sensors are needed.The diagnosis process and the control triggering signal are not related to the load variation.The fault tolerant process employs 5 additional switches to reconfigure the connection between the traction converter and the traction transformer without changing the original devices.All the 5 switches are working under the zero voltage and zero current condition.Simulation and experiment are proceeded to verify the effectiveness of the theoretical analysis.

Key words： Rectifier fault diagnosis fault locate fault tolerant control

Received: 23 March 2015 Published: 15 July 2016

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TM46

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	Articles by authors
	Cheng Shu
	Li Wei
	Chen Tefang
	Ding Rongjun
	Zhang Guixin

Cite this article:

Cheng Shu,Li Wei,Chen Tefang等. Research on Open-Circuit Fault Diagnosis and Fault-Tolerant Control Scheme for Rectifier Main Circuits[J]. Transactions of China Electrotechnical Society, 2016, 31(13): 26-35.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I13/26

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