Investigation of Total Harmonic Distortion (THD) for the Optimize Design of a Single-Phase Seven-Level Diode Clamped Multi-Level Inverter

摘要

In this paper the Investigation of Total Harmonic Distortion (THD) for the Optimize Design of a Single-phaseseven-level Diode Clamped Multilevel Inverter is implemented. The THD analysis of the single-phase sevenleveldiode clamp multi-level inverter is performed using phase disposition (PD), phase opposition disposition(POD), and alternate phase opposition disposition (APOD) SPWM switching control techniques at varyingmodulation index (mi) of 0.6 to 1.0. The result obtained from MATLAB/SIMULINK simulation for THD of theDCMLI using PD SPWM for modulation index of 0.6 to 1.0 shows that the APOD SPWM has the lowest THD of17.89 % at a modulation index of 1.0.