MODELING AND ANALYSIS OF A FOUR-LEG INVERTER USING SPACE VECTOR PULSE WIDTH MODULATION TECHNIQUE

Abstract

The bad effect of zero sequence current in unbalanced load when connected to three-leg inverter is the main challenge leading to add fourth leg and using three dimensional space vector pulse width modulation (3-D) SVPWM technique to handle this problem. The paper presents an analysis and study of this technique, depending on the average large signal model. This technique simulated by using Matlab/Simulink and the results shows good performance with low THD for different operating conditions.

Keywords

• Three-dimensional space vector modulation (3-D SVM)
• three-phase four-leg voltage source inverter (3P4L-VSI)
• Inverter-based distributed generation (IBDG)
• Zero Switching Vectors (ZSV)
• Non- Zero Switching Vector (NZSV)