A Seven-Switch Five-Level Active-Neutral-Point-Clamped Converter and Its Optimal Modulation Strategy

作者：Wang Hongliang; Kou Lei; Liu Yan Fei; Sen Paresh C

来源：IEEE Transactions on Power Electronics, 2017, 32(7): 5146-5161.

DOI：10.1109/TPEL.2016.2614265

• Active-neutral-point-clamped (ANPC) inverter
• flying-capacitor (FC)
• multilevel inverter
• pulse width modulation (PWM)

Multilevel inverters are receiving more attentions nowadays as one of preferred solutions for medium-and high-power applications. As one of the most popular hybrid multilevel inverter topologies, the five-level active-neutral-point-clamped inverter (5L-ANPC) combines the features of the conventional flying-capacitor type and neutral-point-clamped (NPC) type inverter and was commercially used for industrial applications. In order to further decrease the number of active switches, this paper proposes a seven-switch 5L-ANPC (7S-5L-ANPC) topology, which employs only seven active switches and two discrete diodes. The analysis has shown a lower current rating can be selected for the seventh switch under high power factor condition, which is verified by simulation results. The modulation strategy for 7S-5L-ANPC inverter is discussed. A 1 kVA single-phase experimental prototype is built to verify the validity and flexibility of the proposed topology and modulation method.

• 出版日期2017-7