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Simulation of Single Phase Multilevel Inverters with Simple Control Strategy Using MATLAB

Rajesh Kr Ahuja, Lalit Aggarwal, Pankaj Kumar

This paper presents the simulation of single phase three level, five level, seven level , nine level and eleven level inverters.. These different level inverters are realized by cascading one, two, three H- Bridges respectively in MATLAB. A multilevel inverter achieves high power ratings and improves the performance of the whole system in terms of harmonics. In this paper a simple control strategy is applied for switching the switches at appropriate conducting angles with suitable delays.. The Multilevel inverter is used to reduce the harmonics. The inverters with a large number of steps can generate high quality voltage waveforms. The simulation of single phase three level, five level, seven level, nine level and eleven level inverters is done in Matlab/Simulink. The FFT spectrums for the outputs are compared and presented to validate the proposed control strategy.