The Effect of Zero Vector Location in SVPWM Fed by PV System

Abstract

In this paper, the effect of using different switching sequences for the six active and two zero vectors in SVPWM system is studied.   During four different topologies adopted in this work, the six active vectors change their location in the sampling period letting the zero vector occupy a new local location. A global zero vector location is based on a comparison study for the value of the harmonic factor of the lowest order harmonic and the THD of the voltage waveform. Tables and waveforms for the simulated study show that the symmetrical Double pulse topology and the direct sampling frequency topology have the lowest total harmonic distortion of load current besides high utilization of dc input voltage among other adopted topologies.