• T Simhachalam
• Dr. Ch Ravi Kumar

The advance use of power electronic devices introduces harmonics in the supply system which creates a problem in the quality of power delivered. Good Power Quality is very much important for our day to day use of appliances in both industrial and domestic sectors. Researchers have tried and implemented many useful technology for removing all the voltage and current related harmonic occurrence problems which in turn improves the quality of power delivered to the power system. The prime focus of this paper is the implementation of control strategies like SRF theory and instantaneous power (p-q) for the operation of Unified Power Quality Conditioner (UPQC) which is one of the recent technology that includes both series and shunt active power filter operating at the same time and there by improves all the current and voltage related problem like voltage sag/swell, flicker, etc. at the same time and helps in reduction of Total Harmonic Distortion (THD). In this paper it is shown via MATLAB simulation how UPQC model can be used to decrease the % THD in source voltage, source current and load voltage waveforms created due to non-linear sensitive loads usage.

Power Electronic Devices, Harmonic occurrence, Unified Power Quality Conditioner, Harmonic Distortion

"Power Quality Improvement Using Unified Power Quality Conditioner (UPQC)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.462-470, July-2018, Available :http://www.jetir.org/papers/JETIR1807312.pdf

"Power Quality Improvement Using Unified Power Quality Conditioner (UPQC)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp462-470, July-2018, Available at : http://www.jetir.org/papers/JETIR1807312.pdf