• Parimalkumar sureshbhai Patel
• Viral B. Patel

Nowadays more number of electronic devices is used by industries and residences in electrical system. For proper working of these devices, we have to provide high quality of power supply. But these devices inject harmonics in distribution system. This is one of the major problems in electrical system. The various power quality disturbances are transients, interruptions, voltage sag, voltage swell, voltage collapse, harmonics etc. It has been identified that power quality can be degraded both due to utility side abnormalities as well as the customer side abnormalities. To overcome the problems caused by customer side abnormalities so called custom power devices are connected closer to the load end. One modern and very promising solution that deals with both load current and supply voltage imperfections is the Unified Power Quality Conditioner (UPQC). In this dissertation, a UPQC is function of both series and shunt active power filter using P-Q Theory. This concept is introduce for mitigating different problems of power system.

Power quality, Unified Power Quality Conditioner (UPQC), Custom Power, Active power filter.

"Improved control method of UPQC for unbalanced and non linear load conditions", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.2, Issue 6, page no.1840-1848, June-2015, Available :http://www.jetir.org/papers/JETIR1506029.pdf

"Improved control method of UPQC for unbalanced and non linear load conditions", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.2, Issue 6, page no. pp1840-1848, June-2015, Available at : http://www.jetir.org/papers/JETIR1506029.pdf