A Space Vector Pulse Width Modulation with Capacitor Voltage Balance Control for Five-level Active Neutral-Point-Clamped Inverter Based on g-h Coordinate System

Abstract

Active neutral-point clamped five-level(ANPC-5L) inverter is an attractive topology for high-power medium-voltage filed. Aiming at the capacitor voltage balance of ANPC-5L, this paper proposes a hybrid SVM modulation algorithm based on g-h coordinate system without judging sector nor lots of trigonometric function calculation. To realize flying capacitor voltage and dc-link capacitor voltage balance, the appropriate redundancy vector sequences are chosen by judging the current working mode. Simulation results are presented to verify the validity of this method in MATLAB.