Investigation of control scheme based on stationary reference frame using three level space vector modulated grid connected inverter with NP balancing algorithm

In this paper a control scheme based on instantaneous reactive power theory for three phase three level grid connected inverter is presented. A fuzzy logic controller and a PR controller for the DC bus voltage and the current control are applied respectively. Space vector modulation for the switching pattern generation is used. The Space Vector modulation algorithm is improved via the utilization of a Neutral Point balancing technique, which results the performance enhancement of the inverter. Furthermore, the ability of the control system for uninterrupted compensation of the reactive power is investigated. The performance of the proposed electric power system is established using Matlab/Simulink.