基于结温监测的风电IGBT热安全性和寿命耗损研究

doi:10.19595/j.cnki.1000-6753.tces.170883

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Abstract For the insulated gate bipolar transistor (IGBT) modules applied in wind power converters, online monitoring method of junction temperature is studied, thermal safety and lifetime consumption are studied based on junction temperature sequences. Online monitoring model of IGBT module junction temperature was established. The model mainly includes wind turbine model, taking wind speed as an input variable, and the electrothermal coupling model, taking ambient temperature as an input variable. Three characteristic parameters were extracted from a sub-sequence with short time scale in the junction temperature sequences and three characteristic parameter sequences were developed from all the sub-sequences. Then the thermal safety was assessed and the lifetime consumption was quantitatively studied based on the Lesit lifetime model and linear damage accumulation theory. The results show that the main factors affecting IGBT module safety involves temperature fluctuations in winter, temperature fluctuations and high temperature (the temperature corresponds to the maximum probability of a temperature sequence at a certain period) in summer. Temperature difference is one of the main causes of IGBT damage and the lifetime consumption in summer is much higher than that in winter.

Key words： Wind power converters insulated gate bipolar transistor online junction temperature thermal safety damage accumulation

Received: 23 June 2017 Published: 08 May 2018

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TM46

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	Yao Fang
	Hu Yang
	Li Zheng
	Huang Kai
	Li Zhigang

Cite this article:

Yao Fang,Hu Yang,Li Zheng等. Study on Thermal Safety and Lifetime Consumption of IGBT in Wind Power Converters Based on Junction Temperature Monitoring[J]. Transactions of China Electrotechnical Society, 2018, 33(9): 2024-2033.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170883 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I9/2024

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