A New Approach to Dynamic Voltage Restorer Implementation in Distribution Systems Using a Multilevel Inverter System

Abstract

Abstract: The dynamic voltage restorer (DVR) is one of the modern devices used in distribution systems to protect Consumers against sudden changes in voltage amplitude. It is a custom power device used in power distribution networks to protect consumers from sudden sags (and swells) in grid voltage. In this paper, the controller using the P+Resonant controller and charge regulator is proposed in order to eliminate the steady-state error in DVR response and to stabilize the system, respectively. The innovation here is that the DVR with the fifteen level inverter systems protects the PCC voltage during a voltage sag condition without any real power injection into the DVR.Simulation results show the capability of the DVR to control the emergency conditions of the distribution systems.