Withdrawn

Abstract

A comparison between single band hysteresis current controller and double band hysteresis current controller for a single phase grid integrated pulse width modulated VSI is highlighted in this paper. Disadvantages of the HCC like incapability of using zero output state and bipolar nature of output voltage can be overcome by using double band hysteresis current controller. The output of double band controller (DBC) switches between +VDC and zero or -VDC and zero voltage levels resulting in unipolar nature output voltage which is better than the bipolar one in terms of the harmonic content and output current ripple. It also achieves the zero state output voltage and the switching frequency is also reduces in case of DBC. The studied system is modeled and MATLAB/Simulink environment.