Design of GPI Controller for Current Feedback Multilevel Cascaded Inverter

This paper demonstrates the analysis and study of three phase multilevel cascaded inverters. The harmonics can be reduced by using multilevel cascaded inverters and generates desired output voltage and current waveforms. In this work, three phase multilevel inverter is designed using output currents as feedback. This paper presents a seven level three phase inverter using cascaded H-bridges converter with separated DC sources. Control pulses have been generated for these inverters using Sinusoidal Pulse Width Modulation (SPWM). MA TLAB Simulink is used for demonstration of output and performance of these inverters. The Fast Fourier Transform (FFT) spectrums of the outputs currents and voltages are performed and simulation results show that the performance of proposed design is better than other existing systems.