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http://dx.doi.org/10.7471/ikeee.2020.24.1.170

Open Switch Fault Tolerance Control of Active NPC Inverters With HF/LF Modulation  

Jung, Won Seok (Dept. of Electrical and Computer Engineering, Ajou University)
Kim, Ye-Ji (Dept. of Electrical and Computer Engineering, Ajou University)
Kim, Seok-Min (Dept. of Electrical and Computer Engineering, Ajou University)
Lee, Kyo-Beum (Dept. of Electrical and Computer Engineering, Ajou University)
Publication Information
Journal of IKEEE / v.24, no.1, 2020 , pp. 170-177 More about this Journal
Abstract
This paper presents an open-fault tolerance control method for active neutral point clamped (ANPC) inverter with high frequency/low frequency (HF/LF) modulation. By applying the ANPC inverter with SiC MOSFETs and Si IGBTs, the system efficiency and performance can be improved compared to a Si-based inverter. HF/LF modulation is used for a megawatt-scale inverter to minimize the commutation loop. The open-switch failure in megawatt-scale inverter causes severe damage to load and huge expenses when the inverter has been shut-down. The proposed tolerance control of open-switch failure provides continuous operation and improved reliability to the ANPC inverter. The effectiveness of the proposed fault tolerance control is verified by simulation results.
Keywords
Open-switch fault; Fault tolerance control; Silicon carbide (Si); Active neutral point clmaped (ANPC); reliability;
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