Dynamic voltage restorer based on 3-dimensional voltage space vector PWM algorithm

Abstract

A voltage space vector PWM algorithm for a dynamic voltage restorer (DVR) based on a 3-dimensional /spl alpha//spl beta/0 voltage space is described. The switching strategy is applicable to the control of 3-phase 4-wire inverter systems such as the split-capacitor PWM inverter and the 4-leg PWM inverter. Compared to the conventional voltage space vector PWM method, it controls /spl alpha//spl beta/0 components of the terminal voltages instantaneously. The control algorithm was verified by simulation. Experimental results for a 3 kW DVR system using a split-capacitor PWM inverter are presented to validate the simulation results.