Abstract
In order to get the most out of our gadgets and appliances, we need to improve the quality of the electricity they're using. Power quality may be enhanced using a number of available devices. “Distribution Static Synchronous Compensator (DSTATCOM), Static VAR Compensator (SVC), Dynamic Voltage Restorer (DVR), and Unified Power Quality Compensator (UPQC)” are only some of the devices that may be used to enhance power quality in industries. The UPQC is an example of an active power filter. Together with power factor correction and the incorporation of renewable energy sources into the distribution network, it helps to reduce PQ problems associated to voltage and current. Topologies, compensation strategies, control theories, and technology advancements over the last several years are all covered in this study. It is anticipated that this study will play a pivotal role in assisting researchers in making use of the UPQC