Design of Single Phase Multilevel Cascade Inverter Using GPI Controller

The demonstration of generalized proportional integral (GPI) controller for cascaded multilevel single phase inverter design. The multi-level inverter reduces the harmonics and generates high voltage waveforms. The multilevel inverter constructed by two, three, four full H-bridges is considered in this paper. These inverters provide multilevel output voltages. This paper presents simulation results of the inverter system at five, seven and nine levels. MATLAB Simulink is used for demonstration of output and performance of these inverters. The fast fierier transform (FFT) spectrums of the outputs of five, seven and nine levels are compared. Simulation results show that THD can be decreased using GPI controller.