T型逆变器开路故障诊断

doi:10.19595/j.cnki.1000-6753.tces.170137

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Abstract In this paper, the variations of load current and bus capacitor voltage in the case of open circuit fault of T-type inverter are analyzed. Then the fault characteristics of different open circuit switches are summarized. A fault diagnosis strategy based on load current and bus capacitor voltage variation law is proposed. Firstly, the fault of the inverter is judged by detecting bus capacitor voltage. The modulation ratio is limited to 0.25 after the fault is then detected. Finally, the precise location of the fault switch is realized by judging the variation law of load current and bus capacitor voltage in different sectors. The proposed fault diagnosis strategy does not need additional sensors, and it is easy to implement in engineering. Simulation and experimental results verify the feasibility of the proposed fault diagnosis strategy.

Key words： T-type inverter three-level space vector fault diagnosis

Received: 10 February 2017 Published: 24 May 2018

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TM464

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	Articles by authors
	Ma Xiaojun
	Li Minyu
	Wei Shuguang
	Shi Hao

Cite this article:

Ma Xiaojun,Li Minyu,Wei Shuguang等. Open Circuit Fault Diagnosis of T-Type Inverter[J]. Transactions of China Electrotechnical Society, 2018, 33(10): 2324-2333.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170137 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I10/2324

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