A Simulation and Analysis of Neutral Point Clamped Multilevel Inverter

The main usage of multi-level inverters is in medium voltage and high-power applications. From all types of multi-level inverters, proposed system uses Neutral Point Clamped Multilevel Inverter (NPCMLI) due to its robustness. In this paper, simulations of 3-level, 7-level and 9-level are performed using the MATLAB environment and shows appropriate simulation result of each level. This paper also does discussion about no. of switching device, clamping diodes per phase and DC bus capacitor which are used in 3-level inverter. This paper also consists of simulation of MLI with asynchronous machine which is used to provide stable AC power to the induction motor (asynchronous m/c) in industry. At the end, this paper compares THD% value of different level NPCMLI.