Comments on “Fault-Tolerant Control Strategies for T-Type Three-Level Inverters Considering Neutral-Point Voltage Oscillations”
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In the paper by Chen et al. (IEEE Trans. Ind. Electron., vol. 66, no. 4, pp. 2837–2846, Apr. 2019), the authors proposed two fault-tolerant control strategies for T-type three-level inverters considering neutral-point (NP) voltage oscillations. However, some basic problems are worth being discussed about the proposed fault-tolerant control methods. This letter presents some comments and results concerning the paper by Chen et al.
[1] S. El-Barbari,et al. A Comprehensive Study of Neutral-Point Self-Balancing Effect in Neutral-Point-Clamped Three-Level Inverters , 2011, IEEE Transactions on Power Electronics.
[2] Alian Chen,et al. Fault-Tolerant Control Strategies for T-Type Three-Level Inverters Considering Neutral-Point Voltage Oscillations , 2019, IEEE Transactions on Industrial Electronics.