June-Seok Lee, Seung-Joo Lee, and Kyo-Beum Lee, "Novel Switching Method for Single-Phase NPC Three-Level Inverter with Neutral-Point Voltage Control," International Journal of Electronics, vol. 105, no. 2, pp. 303–323, Feb. 2018. -SCI > Paper

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International Journals June-Seok Lee, Seung-Joo Lee, and Kyo-Beum Lee, "Novel Switching Method for Single-Phase NPC Three-Level Inverter with Neutral-Point Voltage Control," International Journal of Electronics, vol. 105, no. 2, pp. 303–323, Feb. 2018. -SCI

2018

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This paper proposes a novel switching method with the neutral-point voltage control in a single-phase neutral-point-clamped three-

level inverter (SP-NPCI) used in photovoltaic systems. A proposed novel switching method for the SP-NPCI improves the efficiency.

The main concept is to fix the switching state of one leg. As a result, the switching loss decreases and the total efficiency is improved.

In addition, it enables the maximum power-point-tracking operation to be performed by applying the proposed neutral-point voltage

control algorithm. This control is implemented by modifying the reference signal. Simulation and experimental results provide

verification of the performance of a novel switching method with the neutral-point voltage control.  

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