Application of DPWM on 3D Space Vector Modulation with ghγ coordinate system for Three Phase Inverters

This paper describes the three dimensional space vector modulation technique and its implementation using ghγ coordinate system for a three phase four wire inverters. The increased population of distributed generation and its resulting unbalances in the three-phase system demands 3D space vector modulation for the inverter switching. The new 3D coordinate system, ghγ is a non-orthogonal coordinate system, derived from the αβγ coordinate system for four wire inverters. Past researchers in this field developed a number of alternate coordinate methods to improve the system with primary focus to reduce computational complexity, common mode voltage as well as switching loss. This paper shows that the application of discontinuous PWM on three dimensional space vector modulation reduces switching loss and common mode voltage.