A three-level neutral point clamped (NPC) converter with neutral-point voltage-balance control (NPVBC) and input power factor correction is proposed in this paper. First, the circuit operations and switching control strategies of the proposed three-level converter are described. Then, a dynamic model of the proposed three-level converter at nominal operating condition is derived. And accordingly, a robust controller is designed to meet the given voltage regulation control specifications. Some simulation results are presented to demonstrate the effectiveness of the proposed controller.
