SVPWM of High Power T-Type Three-Level Neutral-Point-Clamped Inverter

  • Yan Xia, Jianxiao Zou, Kai Li et al.
Keywords: Three-level, Neutral-point-clamped, Inverter, Space-vector-pulse-width-modulation, Current harmonics.


At present, the inverter is mainly two level topology. The three-level (3L) topology has the advantages of high voltage withstand level and low output current harmonics. However, because of the complexity of the modulation algorithm, the 3L topology is seldom used in high power inverters. In this paper, the space-vector-pulse-width-modulation (SVPWM) for 3L topology is studied. A 3L SVPWM is proposed, which is practical and easy to implement, and a 125kW 3L neutral-point-clamped (NPC) inverter is set up. The experimental results show that the proposed algorithm can effectively reduce harmonic current, which has some reference value for the application of high power 3L inverters.