永磁直驱系统变流器开路故障诊断方法

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Abstract The open-circuit faults of the converters in wind energy conversion system will seriously affect the operation of the system. In order to improve the reliability of the system, it is necessary that demands the system can timely detect faults and accurately diagnose the faults’ position. This paper presents a diagnostic method for an open-circuit fault in the two power converters according to the variations of fautly current. This method detects faults based on the variations of current Park’s vector phase, locates fault’s position according to the range of motor-side average current Park’s vector phase and the positive or negative of grid-side each phase current. Simulation and experimental results verify the validity of the proposed method, besides this method has the robustness against disturbance such as load transients, grid voltage sags.

Key words： Directly-driven permanent magnet wind power generation converter fault fault diagnostic

Received: 12 July 2013 Published: 14 September 2015

PACS:	TM461
	TM464

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	Articles by authors
	Huang Keyuan
	Liu Jingjia
	Huang Shoudao
	Yi Yunlan
	Zhou Lize

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Huang Keyuan,Liu Jingjia,Huang Shoudao等. Converters Open-Circuit Fault-Diagnosis Methods Research for Direct-Driven Permanent Magnet Wind Power System[J]. Transactions of China Electrotechnical Society, 2015, 30(16): 129-136.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I16/129

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