A study of feeding an unbalanced load from a four-leg 3-phase inverter using SVPWM technique

The adverse effect of zero sequence current in unbalanced load when connected to a three-leg inverter, is the main challenge leading to add the fourth leg and using three-dimensional space vector pulse width modulation technique to handle this problem. The proposed system simulated by using Matlab/Simulink and the results shows good performance with low total harmonic distortion.