Comparative Analysis of Mc-SPWM and MSVPWM for Seven Level Diode Clamped Multilevel Inverter

Abstract

Multilevel inverters are superior to the two-level inverters to meet medium and high-power applications. A seven-level diode-clamped multilevel topology (7L-DCMT) proposed, and compare the advantages and disadvantages of various control strategies such as multilevel space vector pulse width modulation (MSVPWM) with multicarrier sinusoidal pulse width modulations (MCSPWM) named as level shift and phase shift PWM based on the position of carriers at certain frequency. In level shift is further divided and compare the Inphase disposition sinusoidal pulse width modulation (IPD-SPWM), phase opposition and disposition-sinusoidal pulse width modulation (POD-SPWM), alternate phase opposition and disposition-sinusoidal pulse width modulation (APOD-SPWM) and carrier phase displacement sinusoidal pulse width modulation (CPD-SPWM). The 7L-DCMT designed with MATLAB/SIMULINK and the performance can analyses based on the observing total harmonic distortion (THD) at different control strategies.