Simplified structure - A mapped space vector pulse width modulation for three level neutral point diode clamped multilevel inverter

In this paper, the space vector modulation technique for an ordinary two level inverter is described. Based on the two level inverter, the paper further deals with space vector PWM technique for a three level inverter. A new algorithm is adopted which ensures reduced computational complexity and the same methodology can be used with higher levels as well. Further a performance comparison of both two and three level inverter is done and this proves superiority of multilevel inverters over an ordinary inverter.A new multilevel space vector modulation (SVM) technique, termed mapped hybrid SVM, is presented. The SVM technique enables the use of three level SVM with multilevel inverters without introducing any carrier level modulation or phase shifts. The proposed technique is theoretically analyzed for five-, seven- and nine-level inverters and then generalized for the m-level inverter, validated by simulation using Matlab/Simulink and confirmed practically for a five-level, shunt, active power filter.