Current Status of Researcheson Voltage Flicker Mitigation Techniques Based Application of Custom Power Devices in Distribution Systems

ABSTRACT:Voltage flicker is considered as one of the most severe power quality problems especially in loads like electrical arc furnaces (EAF) and much attention have been paid to it lately. Due to the latest achievements in the semiconductors industry and consequently the emergence of the compensators based on voltage source converters, FACTS devices have been gradually noticed to be used for voltage flicker compensation. This paper is to review the current state of the simulation and implementation ofpresented control technologies of various custom power devises such as DVR, STATCOM, SVC and UPFC employed in distribution systems to mitigates fluctuating voltage. It is found that continued research and development effort in this area is still needed for improving thesystems’ performance, establishing techniques for accurately predicting their output and reliably integrating them with other power quality disturbances.