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Power quality issues have become an increasing concern due to an increase of sensitive loads in distribution system. A dynamic series compensator or Dynamic Voltage Restorer (DVR) is a custom device that can be used to protect sensitive loads from various power quality problems from disturbed incoming supply. The dynamic voltage restorer (DVR) has become popular as a cost effective solution for the protection of sensitive loads from voltage sags. This paper highlights a series of discussion, analysis and studies performed on the active power injection requirements for a DVR under various system and load conditions, as well as for different types of fault in both single phase and three-phase fault. The analysis and experimental results validate the effectiveness of the DVR for mitigation voltage sag in low voltage distribution system.

Design Requirements for a Dynamic Series Compensator for Voltage Sags Mitigation in Low Voltage Distribution System