A Literature Review on Dynamic Voltage Restorer for Voltage Sags Mitigation in Medium Voltage Networks with Secondary Distribution Configuration

摘要

In recent years, utilities have been facing rising number of complaints regarding quality of power due to sags and swells. The paper is focused on the analysis of research works on mitigation of voltage sag problems in medium voltage with secondary distribution networks configuration and have been reviewed with aspect to DVR technology .The DVR (Dynamic Voltage Restorer) is a power custom device used to restore the load voltage to pre-sag voltage conditions during sag event. The DVR normally installed between the sources. Voltage and critical or sensitive load .DVR has to automatically detect and inject required voltage into the system whenever power quality problems occur. The Dynamic Voltage Restore (DVR) has become widely accepted as a cost effective key for the protection of sensitive loads from disturbances.