• Mr. Abhishek U. Deshmukh
• Dr. D.T. Ingole
• Prof. Sourabh Thakare

In this review paper author shows a three-phase line-interactive uninterruptible power supply (UPS) system along with the series-parallel power-line conditioning capabilities. In this system for harmonic and reactive power compensation author used Synchronous reference frame (SRF)-based controller that can be generated from any configuration of non-linear loads. General line conditions UPS system works on the principal of compensating the input currents and output voltages. Here author introduce a new technology which consist of two three-phase pulse width modulation (PWM) converters. First called series active filters and second called parallel active filters. This two are used to perform the series and parallel active power-line compensation. The series active filter works as sinusoidal current source in phase with the input voltage, drawing from utility sinusoidal and balanced input currents with low total harmonic distortion (THD). The parallel active filter works as sinusoidal voltage source in phase with the input voltage, providing regulated and sinusoidal output voltages with low THD.

Total harmonic distortion (THD), Synchronous reference frame (SRF), line-interactive UPS.

"Review on: To Optimize the Reduction of THD of Line Interactive UPS System with SRF Controller in 3 Phase 4 Wire System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 4, page no.460-463, April-2018, Available :http://www.jetir.org/papers/JETIR1804309.pdf

"Review on: To Optimize the Reduction of THD of Line Interactive UPS System with SRF Controller in 3 Phase 4 Wire System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 4, page no. pp460-463, April-2018, Available at : http://www.jetir.org/papers/JETIR1804309.pdf