A Novel Concept of Nine Level Active Neutral Point Converter

This paper presents a new single-phase nine-level active neutral-point clamped converter topology. The main aim of this topology is to achieve optimal total harmonic distortion and helps to obtain voltage balancing among the capacitors. An analysis of the switching state and commutation of the converter are also presented here in order to balance the power losses among the semiconductor devices. This paper also analyzes the Space Vector Pulse Width Modulation (SVPWM) strategy for 9L-ANPC converter in the virtual coordinate, and presents an optimized control strategy which can balance the Neutral Point (NP) voltage and avoid the dead-time effects for the first time. The nine-level active neutral-point-clamped (9LANPC) converter has been widely studied for its excellent performance in high-power medium-voltage applications. The simulation has been carried out in MATLAB SIMULINK to investigate the effectiveness of the proposed topology.