• ASHISH THAPA
• MOHITH AKASH

First of all we need to know what is power quality. Power quality is one of the major issue during these days.Power quality(good) can be defined as stable supply voltage that remains within the specify range.Improper supply can lead to damage the equipment or may not give expected output. Power quality problems is an incidents seem as a abnormal current, voltage or repeat that outputs in error of close operate equipment's.Conscious mechanical weights and adequacy flow frameworks experience the evil encounter of various sorts of power outages and organization impedance which can lead to an important fiscal failure. For improvement of power quality special type of power devices are used. One of them is known as (DVR)dynamic voltage restorer. Working of dynamic voltage restorer is shown in simulation below. In this project, PWM generator and DQ controller(PLL based) are used for control logic. For different load ,different supply voltage is given. The major issues oversaw here are voltage swell, voltage swag, and voltages unbalances.The operating standard of DVR is delineated as underneath: Exposure circuit is used in first to distinguish the current and voltage of the network. we can develop the needed redress voltage abundancy . Inverter is use to convert dc to ac, and a channel circuit is used to penetrate through demand for symphonious of output wave. So that voltage is taken and it is enclose on voltage of structure with help of transformer.

"DYNAMIC VOLTAGE RESTORER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.510-515, April-2019, Available :http://www.jetir.org/papers/JETIR1904F81.pdf

"DYNAMIC VOLTAGE RESTORER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp510-515, April-2019, Available at : http://www.jetir.org/papers/JETIR1904F81.pdf