This paper argues that supplemental features in non-traditional energy systems are in high demand, especially in LV distribution networks. This is because of the meteoric rise of loads based on power electronics and alternative energy sources. These loads cause the grid to experience harmonic currents. Weak grid systems experience distortion because of this at the PCC. Voltage fluctuations happen at PCC because of the use of non-conventional energy sources like solar, wind, etc. The rising cost of repairs is directly attributable to these voltage fluctuations. Hence The combination of non-conventional energy sources with PQ improvement systems like DSTATCOM, DVR, UPQC, etc. provides the best possible power quality and clean energy solution. In this work, we propose a power quality (PQ) theory-based controller for a UPQC that is integrated into a solar PV array. To further aid in the compensation of harmonic voltages by series active filters, this paper also suggests controllers based on the Synchronous Reference Frame (SRF). Power factor is increased, and Total Harmonic Distortion (THD) is decreased when SRF is used for UPQC control.