June-Seok Lee, Ui-Min Choi, and Kyo-Beum Lee, "Comparison of Tolerance Controls for Open-Switch Fault in a Grid-Connected T-Type Rectifier," IEEE Transactions on Power Electronics, vol. 30, no. 10, pp. 5810–5820, Oct. 2015. -SCI > Paper

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Paper

International Journals June-Seok Lee, Ui-Min Choi, and Kyo-Beum Lee, "Comparison of Tolerance Controls for Open-Switch Fault in a Grid-Connected T-Type Rectifier," IEEE Transactions on Power Electronics, vol. 30, no. 10, pp. 5810–5820, Oct. 2015. -SCI

2015

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Multilevel rectifier topologies are commonly used in wide-power range applications. The T-type rectifier topology, which is a three-

level topology, has an advantage in terms of efficiency compared to a neutral-point clamped (NPC)-type topology. In applications

using the T-type rectifier topology, improving reliability has gained increased attention recently. A tolerance control for T-type

rectifiers is necessary to improve the reliability of applications. When an open fault of switches connected to the neutralpoint occurs,

the NPC-type rectifier cannot restore distorted input currents, on the other hand, the T-type rectifier can eliminate the input current

distortion completely. In this paper, we report two studies: 1) a three-level switching-oriented tolerance control, which is 

advantageous in terms of efficiency, for the Sx 2 and Sx 3 open-switch faults of the T-type rectifier and 2) comparison of the 

proposed tolerance control with two existing tolerance controls. In particular, the current total harmonic distortion, dc-link voltage 

ripple, and switch losses of these tolerance controls are analyzed by using simulation and experimental results. 

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