Dual-T-Type Seven-Level Boost Active-Neutral-Point-Clamped Inverter

By Sze Sing Lee, Kyo-Beum Lee. IEEE transactions on power electronics, 2019

177 citations recorded by the source corpus.

The conventional three-level active-neutral-point-clamped (ANPC) inverter requires high dc-link voltage at least twice the peak of ac output. To reduce the dc-link voltage, a recent topology that enhanced the voltage gain from half to unity has been presented. In this letter, an alternative ANPC topology is established by using two T-type inverters. Two floating capacitors with self-voltage balancing capability are integrated to achieve a voltage-boosting gain of 1.5. In addition, the proposed topology is capable of generating seven voltage levels. Its operation is validated through circuit analysis followed by experimental results of a prototype.

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