Real-time condition monitoring of IGBT modules in PV inverter systems

Conference: CIPS 2018 - 10th International Conference on Integrated Power Electronics Systems
03/20/2018 - 03/22/2018 at Stuttgart, Deutschland

Proceedings: ETG-Fb. 156: CIPS 2018

Pages: 5Language: englishTyp: PDF

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Choi, Ui-Min; Blaabjerg, Frede (Center of Reliable Power Electronics (CORPE), Department of Energy Technology, Aalborg University, Aalborg, Denmark)

This paper proposes a new method for the real-time condition monitoring of IGBT modules in PV inverter system. The proposed method uses only one monitoring parameter, VCE_ON and the wear-out failure modes of IGBT modules, bond-wire fatigue and solder joint fatigue can be distinguished by the VCE_ON values at two measurement points. Thus, it is cost-effective compared with using one more monitoring parameter in order to separate failure modes. Furthermore, the proposed method does not require re-characterizations of IGBT modules as it is worn out. Experimental results verify the validity and feasibility of the proposed method.