PROJECT TITLE :

Investigation on Dynamic Voltage Restorers With Two DC Links and Series Converters for Three-Phase Four-Wire Systems

ABSTRACT:

This paper proposes 3 dynamic voltage restorer (DVR) topologies. Such configurations are able to compensate voltage sags/swells in 3-section four-wire (3P4W) systems below balanced and unbalanced conditions. The proposed systems use two freelance dc links. Proposed configurations gift advantages in terms of switch blocking voltages and consequently lower dc-link voltage rating. The whole management system, as well as the pulsewidth modulation (PWM) technique, is developed, and comparisons between the proposed configurations and a typical one are performed. Simulation and experimental results are provided to validate the theoretical approach.